# Oroco Continues South Zone Success

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b

Original source: https://www.newsfilecorp.com/release/313782/Oroco-Continues-South-Zone-Success

Publisher: newsfile

Original announcement: 2026-09-10T11:00:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Oroco Resource Corp.

- Ticker: OCO

- Exchange: Unavailable

- Region: Sinaloa, Mexico

- Primary commodity: Copper

- Secondary commodities: Molybdenum, Gold, Silver

- Document categories: Drill results, Metallurgy

- Extracted: 2026-09-10 11:15:21 UTC

Narrative sentiment: 0.80 · Bullish

## Minestarters Atlas summary

Oroco Resource Corp. reported positive assay results from its Phase 2 drilling program at the Santo Tomás copper project in Mexico, with several holes confirming and extending mineralization beyond current pit limits. Notable intercepts include 369.3 m grading 0.45% CuEq in hole S042 and 103 m grading 0.58% CuEq in S039. The drilling aims to convert Inferred Mineral Resources to the Indicated category and gather data for a Pre-Feasibility Study, supported by ongoing geometallurgical characterization.

Reasoning: The drill results confirm and extend significant copper mineralization at the South Zone, supporting resource upgrades and future economic studies, with robust QA/QC and ongoing geometallurgical work enhancing project confidence.

- Positive factor: Long intercepts with significant copper equivalent grades, including 369.3 m at 0.45% CuEq in S042.

- Positive factor: Drilling extended mineralization beyond the current PEA pit limits in holes S038 and S041, indicating potential resource expansion.

- Positive factor: Infill drilling supports the conversion of Inferred Mineral Resources to the Indicated category, de-risking the project.

- Positive factor: Geometallurgical work is underway to improve PFS-level mine planning and optimize mill throughput.

- Positive factor: Comprehensive QA/QC procedures are disclosed, including certified labs and QP sign-off.

- Negative factor: Copper equivalent calculations use variable recoveries and different metal prices than previous reports, making direct comparison challenging.

- Negative factor: Intervals are reported as downhole lengths, and true widths are not yet confirmed.

Low confidence — this extraction should be reviewed alongside the original source.

Facts used in scoring: 127

## Classification and evidence

**Mill Route**

Polarity: neutral

Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\).

Why it applies: the document describes a mill\_cil route \("CIP"\)

## Extracted facts

Stored fact records: 127. Some facts used in scoring do not have a stored record.

## Drill Results (127)

### S035

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-0)

Santo Tomás · copper

#### Identity

- Hole ID: S035
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.34
- Grade Unit: %
- Intercept: 25.2 m
- From: 74.8 m
- To: 100 m
- Intercept Depth: 74.8 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S035:74.8-100
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778838
- Northing: 2975787
- Elevation: 651 m
- Azimuth: 100 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A moderate copper equivalent grade over a reasonable width, confirming historical mineralization.

- Positive factor: Confirmed mineralization tenor relative to historical hole STD-35.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.34

Context: 25.2

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S035

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-1)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S035
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.002
- Grade Unit: %
- Intercept: 25.2 m
- From: 74.8 m
- To: 100 m
- Intercept Depth: 74.8 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S035:74.8-100
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778838
- Northing: 2975787
- Elevation: 651 m
- Azimuth: 100 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.002

Context: 25.2

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S035

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-2)

Santo Tomás · gold

#### Identity

- Hole ID: S035
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.09
- Grade Unit: ppm
- Intercept: 25.2 m
- From: 74.8 m
- To: 100 m
- Intercept Depth: 74.8 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S035:74.8-100
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778838
- Northing: 2975787
- Elevation: 651 m
- Azimuth: 100 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.090

Context: 25.2

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S035

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-3)

Santo Tomás · silver

#### Identity

- Hole ID: S035
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.19
- Grade Unit: ppm
- Intercept: 25.2 m
- From: 74.8 m
- To: 100 m
- Intercept Depth: 74.8 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S035:74.8-100
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778838
- Northing: 2975787
- Elevation: 651 m
- Azimuth: 100 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.19

Context: 25.2

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S035

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-4)

Santo Tomás · copper

#### Identity

- Hole ID: S035
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.55
- Grade Unit: %
- Intercept: 57.4 m
- From: 108 m
- To: 165.4 m
- Intercept Depth: 74.8 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S035:108-165.4
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778838
- Northing: 2975787
- Elevation: 651 m
- Azimuth: 100 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.72
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A strong copper equivalent grade over a significant width, contributing positively to the resource model.

- Positive factor: Strong copper equivalent grade over a significant width.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.55

Context: 57.4

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S035

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-5)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S035
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.002
- Grade Unit: %
- Intercept: 57.4 m
- From: 108 m
- To: 165.4 m
- Intercept Depth: 74.8 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S035:108-165.4
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778838
- Northing: 2975787
- Elevation: 651 m
- Azimuth: 100 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.72
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.002

Context: 57.4

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S035

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-6)

Santo Tomás · gold

#### Identity

- Hole ID: S035
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.12
- Grade Unit: ppm
- Intercept: 57.4 m
- From: 108 m
- To: 165.4 m
- Intercept Depth: 74.8 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S035:108-165.4
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778838
- Northing: 2975787
- Elevation: 651 m
- Azimuth: 100 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.72
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.120

Context: 57.4

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S035

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-7)

Santo Tomás · silver

#### Identity

- Hole ID: S035
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.8
- Grade Unit: ppm
- Intercept: 57.4 m
- From: 108 m
- To: 165.4 m
- Intercept Depth: 74.8 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S035:108-165.4
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778838
- Northing: 2975787
- Elevation: 651 m
- Azimuth: 100 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.72
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.80

Context: 57.4

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-8)

Santo Tomás · copper

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.32
- Grade Unit: %
- Intercept: 17.4 m
- From: 92 m
- To: 109.4 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:92-109.4
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.4
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate copper equivalent grade over a reasonable width, confirming historical data.

- Positive factor: Copper grades correlate well with historical hole STD-50, confirming mineralization.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.32

Context: 17.4

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-9)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.011
- Grade Unit: %
- Intercept: 17.4 m
- From: 92 m
- To: 109.4 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:92-109.4
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.4
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.011

Context: 17.4

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-10)

Santo Tomás · gold

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.01
- Grade Unit: ppm
- Intercept: 17.4 m
- From: 92 m
- To: 109.4 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:92-109.4
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.4
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.010

Context: 17.4

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-11)

Santo Tomás · silver

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.22
- Grade Unit: ppm
- Intercept: 17.4 m
- From: 92 m
- To: 109.4 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:92-109.4
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.4
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.22

Context: 17.4

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-12)

Santo Tomás · copper

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.32
- Grade Unit: %
- Intercept: 186 m
- From: 113 m
- To: 299 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:113-299
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.37
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A long intercept with moderate copper equivalent grade, supporting resource continuity.

- Positive factor: Long intercept length, confirming continuity of mineralization.

- Positive factor: Copper grades correlate well with historical hole STD-50.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.32

Context: 186

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-13)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.006
- Grade Unit: %
- Intercept: 186 m
- From: 113 m
- To: 299 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:113-299
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.37
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.006

Context: 186

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-14)

Santo Tomás · gold

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.022
- Grade Unit: ppm
- Intercept: 186 m
- From: 113 m
- To: 299 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:113-299
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.37
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.022

Context: 186

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-15)

Santo Tomás · silver

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.7
- Grade Unit: ppm
- Intercept: 186 m
- From: 113 m
- To: 299 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:113-299
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.37
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 1.70

Context: 186

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-16)

Santo Tomás · copper

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.3
- Grade Unit: %
- Intercept: 82.3 m
- From: 307 m
- To: 389.3 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:307-389.3
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.37
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A significant intercept with moderate copper equivalent grade, supporting resource continuity.

- Positive factor: Significant intercept length, confirming continuity of mineralization.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.30

Context: 82.3

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-17)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.007
- Grade Unit: %
- Intercept: 82.3 m
- From: 307 m
- To: 389.3 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:307-389.3
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.37
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.007

Context: 82.3

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-18)

Santo Tomás · gold

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.018
- Grade Unit: ppm
- Intercept: 82.3 m
- From: 307 m
- To: 389.3 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:307-389.3
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.37
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.018

Context: 82.3

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-19)

Santo Tomás · silver

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.75
- Grade Unit: ppm
- Intercept: 82.3 m
- From: 307 m
- To: 389.3 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:307-389.3
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.37
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 1.75

Context: 82.3

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-20)

Santo Tomás · copper

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.16
- Grade Unit: %
- Intercept: 16 m
- From: 435 m
- To: 451 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:435-451
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.23
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low copper equivalent grade over a narrow width, but still above cutoff.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.16

Context: 16

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-21)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.011
- Grade Unit: %
- Intercept: 16 m
- From: 435 m
- To: 451 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:435-451
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.23
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.011

Context: 16

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-22)

Santo Tomás · gold

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.005
- Grade Unit: ppm
- Intercept: 16 m
- From: 435 m
- To: 451 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:435-451
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.23
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.005

Context: 16

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S036

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-23)

Santo Tomás · silver

#### Identity

- Hole ID: S036
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.74
- Grade Unit: ppm
- Intercept: 16 m
- From: 435 m
- To: 451 m
- Intercept Depth: 92 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S036:435-451
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779088
- Northing: 2974949
- Elevation: 802 m
- Azimuth: 0 °
- Dip: -90 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.23
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 1.74

Context: 16

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-24)

Santo Tomás · copper

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.09
- Grade Unit: %
- Intercept: 12 m
- From: 0 m
- To: 12 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:0-12
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.16
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A low copper equivalent grade over a narrow width, consistent with the block model.

- Positive factor: Grades conform with the block model and current pit limit.

- Negative factor: Low copper equivalent grade, barely above cutoff.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.09

Context: 12

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-25)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.005
- Grade Unit: %
- Intercept: 12 m
- From: 0 m
- To: 12 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:0-12
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.16
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.005

Context: 12

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-26)

Santo Tomás · gold

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.006
- Grade Unit: ppm
- Intercept: 12 m
- From: 0 m
- To: 12 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:0-12
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.16
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.006

Context: 12

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-27)

Santo Tomás · silver

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 3.07
- Grade Unit: ppm
- Intercept: 12 m
- From: 0 m
- To: 12 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:0-12
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.16
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 3.07

Context: 12

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-28)

Santo Tomás · copper

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.28
- Grade Unit: %
- Intercept: 167 m
- From: 18 m
- To: 185 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:18-185
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A long intercept with moderate copper equivalent grade, supporting resource continuity and model conformity.

- Positive factor: Long intercept length, confirming continuity of mineralization.

- Positive factor: Grades conform with the block model and current pit limit.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.28

Context: 167

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-29)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.015
- Grade Unit: %
- Intercept: 167 m
- From: 18 m
- To: 185 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:18-185
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.015

Context: 167

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-30)

Santo Tomás · gold

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.01
- Grade Unit: ppm
- Intercept: 167 m
- From: 18 m
- To: 185 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:18-185
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.010

Context: 167

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-31)

Santo Tomás · silver

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.9
- Grade Unit: ppm
- Intercept: 167 m
- From: 18 m
- To: 185 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:18-185
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 1.90

Context: 167

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-32)

Santo Tomás · copper

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.28
- Grade Unit: %
- Intercept: 51.8 m
- From: 195.8 m
- To: 247.6 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:195.8-247.6
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A moderate copper equivalent grade over a reasonable width, consistent with the block model.

- Positive factor: Grades conform with the block model and current pit limit.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.28

Context: 51.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-33)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.009
- Grade Unit: %
- Intercept: 51.8 m
- From: 195.8 m
- To: 247.6 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:195.8-247.6
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.009

Context: 51.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-34)

Santo Tomás · gold

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.018
- Grade Unit: ppm
- Intercept: 51.8 m
- From: 195.8 m
- To: 247.6 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:195.8-247.6
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.018

Context: 51.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S037

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-35)

Santo Tomás · silver

#### Identity

- Hole ID: S037
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.47
- Grade Unit: ppm
- Intercept: 51.8 m
- From: 195.8 m
- To: 247.6 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S037:195.8-247.6
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779260
- Northing: 2974443
- Elevation: 763 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.47

Context: 51.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-36)

Santo Tomás · copper

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.09
- Grade Unit: %
- Intercept: 33 m
- From: 0 m
- To: 33 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:0-33
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.19
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A low copper equivalent grade over a reasonable width, consistent with the block model.

- Negative factor: Low copper equivalent grade, barely above cutoff.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.09

Context: 33

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-37)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.011
- Grade Unit: %
- Intercept: 33 m
- From: 0 m
- To: 33 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:0-33
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.19
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.011

Context: 33

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-38)

Santo Tomás · gold

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.009
- Grade Unit: ppm
- Intercept: 33 m
- From: 0 m
- To: 33 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:0-33
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.19
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.009

Context: 33

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-39)

Santo Tomás · silver

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.52
- Grade Unit: ppm
- Intercept: 33 m
- From: 0 m
- To: 33 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:0-33
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.19
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.52

Context: 33

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-40)

Santo Tomás · copper

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.34
- Grade Unit: %
- Intercept: 21.8 m
- From: 70 m
- To: 91.8 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:70-91.8
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.39
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A moderate copper equivalent grade over a reasonable width.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.34

Context: 21.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-41)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.008
- Grade Unit: %
- Intercept: 21.8 m
- From: 70 m
- To: 91.8 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:70-91.8
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.39
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.008

Context: 21.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-42)

Santo Tomás · gold

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.012
- Grade Unit: ppm
- Intercept: 21.8 m
- From: 70 m
- To: 91.8 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:70-91.8
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.39
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.012

Context: 21.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-43)

Santo Tomás · silver

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.24
- Grade Unit: ppm
- Intercept: 21.8 m
- From: 70 m
- To: 91.8 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:70-91.8
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.39
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 1.24

Context: 21.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-44)

Santo Tomás · copper

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.37
- Grade Unit: %
- Intercept: 26.8 m
- From: 101.4 m
- To: 128.2 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:101.4-128.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A moderate copper equivalent grade over a reasonable width.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.37

Context: 26.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-45)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.011
- Grade Unit: %
- Intercept: 26.8 m
- From: 101.4 m
- To: 128.2 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:101.4-128.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.011

Context: 26.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-46)

Santo Tomás · gold

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.011
- Grade Unit: ppm
- Intercept: 26.8 m
- From: 101.4 m
- To: 128.2 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:101.4-128.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.011

Context: 26.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-47)

Santo Tomás · silver

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.62
- Grade Unit: ppm
- Intercept: 26.8 m
- From: 101.4 m
- To: 128.2 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:101.4-128.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.62

Context: 26.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-48)

Santo Tomás · copper

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.39
- Grade Unit: %
- Intercept: 55.9 m
- From: 135 m
- To: 190.9 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:135-190.9
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.49
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A moderate copper equivalent grade over a significant width.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.39

Context: 55.9

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-49)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.014
- Grade Unit: %
- Intercept: 55.9 m
- From: 135 m
- To: 190.9 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:135-190.9
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.49
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.014

Context: 55.9

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-50)

Santo Tomás · gold

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.021
- Grade Unit: ppm
- Intercept: 55.9 m
- From: 135 m
- To: 190.9 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:135-190.9
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.49
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.021

Context: 55.9

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-51)

Santo Tomás · silver

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.99
- Grade Unit: ppm
- Intercept: 55.9 m
- From: 135 m
- To: 190.9 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:135-190.9
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.49
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 1.99

Context: 55.9

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-52)

Santo Tomás · copper

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.27
- Grade Unit: %
- Intercept: 76 m
- From: 198 m
- To: 274 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:198-274
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.47
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A long intercept with moderate copper equivalent grade, extending mineralization beyond the current pit limits.

- Positive factor: Long intercept length, confirming continuity of mineralization.

- Positive factor: Ended in mineralization approximately 200 m vertically below the current PEA pit limit, indicating potential for mineralization beyond the current pit shell.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.27

Context: 76

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-53)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.039
- Grade Unit: %
- Intercept: 76 m
- From: 198 m
- To: 274 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:198-274
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.47
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Strong molybdenum grade, contributing significantly to the overall CuEq.

Evidence · table

> 0.039

Context: 76

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-54)

Santo Tomás · gold

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.014
- Grade Unit: ppm
- Intercept: 76 m
- From: 198 m
- To: 274 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:198-274
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.47
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.014

Context: 76

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-55)

Santo Tomás · silver

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.09
- Grade Unit: ppm
- Intercept: 76 m
- From: 198 m
- To: 274 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:198-274
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.47
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.09

Context: 76

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-56)

Santo Tomás · copper

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.08
- Grade Unit: %
- Intercept: 15 m
- From: 314 m
- To: 329 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:314-329
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.2
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A low copper equivalent grade over a narrow width, consistent with the block model.

- Negative factor: Low copper equivalent grade, barely above cutoff.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.08

Context: 15

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-57)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.022
- Grade Unit: %
- Intercept: 15 m
- From: 314 m
- To: 329 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:314-329
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.2
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.022

Context: 15

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-58)

Santo Tomás · gold

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.012
- Grade Unit: ppm
- Intercept: 15 m
- From: 314 m
- To: 329 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:314-329
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.2
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.012

Context: 15

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-59)

Santo Tomás · silver

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.89
- Grade Unit: ppm
- Intercept: 15 m
- From: 314 m
- To: 329 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:314-329
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.2
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 0.89

Context: 15

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-60)

Santo Tomás · copper

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.08
- Grade Unit: %
- Intercept: 22 m
- From: 337 m
- To: 359 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:337-359
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.18
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A low copper equivalent grade over a narrow width, consistent with the block model.

- Negative factor: Low copper equivalent grade, barely above cutoff.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.08

Context: 22

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-61)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.012
- Grade Unit: %
- Intercept: 22 m
- From: 337 m
- To: 359 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:337-359
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.18
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.012

Context: 22

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-62)

Santo Tomás · gold

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.007
- Grade Unit: ppm
- Intercept: 22 m
- From: 337 m
- To: 359 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:337-359
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.18
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.007

Context: 22

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-63)

Santo Tomás · silver

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.5
- Grade Unit: ppm
- Intercept: 22 m
- From: 337 m
- To: 359 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:337-359
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.18
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.50

Context: 22

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-64)

Santo Tomás · copper

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.13
- Grade Unit: %
- Intercept: 29.2 m
- From: 370 m
- To: 399.2 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:370-399.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.24
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A low copper equivalent grade over a narrow width, consistent with the block model.

- Negative factor: Low copper equivalent grade, barely above cutoff.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.13

Context: 29.2

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-65)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.018
- Grade Unit: %
- Intercept: 29.2 m
- From: 370 m
- To: 399.2 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:370-399.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.24
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.018

Context: 29.2

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-66)

Santo Tomás · gold

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.008
- Grade Unit: ppm
- Intercept: 29.2 m
- From: 370 m
- To: 399.2 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:370-399.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.24
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.008

Context: 29.2

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S038

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-67)

Santo Tomás · silver

#### Identity

- Hole ID: S038
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.9
- Grade Unit: ppm
- Intercept: 29.2 m
- From: 370 m
- To: 399.2 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S038:370-399.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779257
- Northing: 2974444
- Elevation: 763 m
- Azimuth: 280 °
- Dip: -65 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.24
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 1.90

Context: 29.2

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-68)

Santo Tomás · copper

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.17
- Grade Unit: %
- Intercept: 13.8 m
- From: 25 m
- To: 38.8 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:25-38.8
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.2
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A low copper equivalent grade over a narrow width, consistent with the block model.

- Positive factor: Assays correspond well with the copper grades estimated in the block model.

- Negative factor: Low copper equivalent grade, barely above cutoff.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.17

Context: 13.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-69)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.004
- Grade Unit: %
- Intercept: 13.8 m
- From: 25 m
- To: 38.8 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:25-38.8
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.2
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.004

Context: 13.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-70)

Santo Tomás · gold

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.02
- Grade Unit: ppm
- Intercept: 13.8 m
- From: 25 m
- To: 38.8 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:25-38.8
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.2
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.020

Context: 13.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-71)

Santo Tomás · silver

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.6
- Grade Unit: ppm
- Intercept: 13.8 m
- From: 25 m
- To: 38.8 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:25-38.8
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.2
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 1.60

Context: 13.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-72)

Santo Tomás · copper

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.13
- Grade Unit: %
- Intercept: 11 m
- From: 55 m
- To: 66 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:55-66
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.17
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A low copper equivalent grade over a narrow width, consistent with the block model.

- Positive factor: Assays correspond well with the copper grades estimated in the block model.

- Negative factor: Low copper equivalent grade, barely above cutoff.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.13

Context: 11

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-73)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.003
- Grade Unit: %
- Intercept: 11 m
- From: 55 m
- To: 66 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:55-66
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.17
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.003

Context: 11

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-74)

Santo Tomás · gold

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.018
- Grade Unit: ppm
- Intercept: 11 m
- From: 55 m
- To: 66 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:55-66
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.17
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.018

Context: 11

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-75)

Santo Tomás · silver

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.98
- Grade Unit: ppm
- Intercept: 11 m
- From: 55 m
- To: 66 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:55-66
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.17
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 1.98

Context: 11

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-76)

Santo Tomás · copper

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.14
- Grade Unit: %
- Intercept: 10 m
- From: 80 m
- To: 90 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:80-90
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.19
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A low copper equivalent grade over a narrow width, consistent with the block model.

- Positive factor: Assays correspond well with the copper grades estimated in the block model.

- Negative factor: Low copper equivalent grade, barely above cutoff.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.14

Context: 10

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-77)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.003
- Grade Unit: %
- Intercept: 10 m
- From: 80 m
- To: 90 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:80-90
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.19
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.003

Context: 10

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-78)

Santo Tomás · gold

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.009
- Grade Unit: ppm
- Intercept: 10 m
- From: 80 m
- To: 90 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:80-90
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.19
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.009

Context: 10

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-79)

Santo Tomás · silver

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.96
- Grade Unit: ppm
- Intercept: 10 m
- From: 80 m
- To: 90 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:80-90
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.19
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.96

Context: 10

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-80)

Santo Tomás · copper

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.47
- Grade Unit: %
- Intercept: 103 m
- From: 98 m
- To: 201 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:98-201
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.58
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A strong copper equivalent grade over a significant width, consistent with the block model.

- Positive factor: Strong copper equivalent grade over a significant width.

- Positive factor: Assays correspond well with the copper grades estimated in the block model.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.47

Context: 103

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-81)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.006
- Grade Unit: %
- Intercept: 103 m
- From: 98 m
- To: 201 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:98-201
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.58
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.006

Context: 103

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-82)

Santo Tomás · gold

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.045
- Grade Unit: ppm
- Intercept: 103 m
- From: 98 m
- To: 201 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:98-201
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.58
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.045

Context: 103

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S039

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-83)

Santo Tomás · silver

#### Identity

- Hole ID: S039
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 3.36
- Grade Unit: ppm
- Intercept: 103 m
- From: 98 m
- To: 201 m
- Intercept Depth: 25 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S039:98-201
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779199
- Northing: 2975319
- Elevation: 759 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.58
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 3.36

Context: 103

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-84)

Santo Tomás · copper

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.42
- Grade Unit: %
- Intercept: 154 m
- From: 131 m
- To: 285 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:131-285
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.51
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A long intercept with strong copper equivalent grade, consistent with the block model.

- Positive factor: Long intercept length with strong copper equivalent grade.

- Positive factor: Assays correspond well with the copper grades estimated in the block model.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.42

Context: 154

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-85)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.011
- Grade Unit: %
- Intercept: 154 m
- From: 131 m
- To: 285 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:131-285
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.51
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.011

Context: 154

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-86)

Santo Tomás · gold

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.024
- Grade Unit: ppm
- Intercept: 154 m
- From: 131 m
- To: 285 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:131-285
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.51
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.024

Context: 154

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-87)

Santo Tomás · silver

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.66
- Grade Unit: ppm
- Intercept: 154 m
- From: 131 m
- To: 285 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:131-285
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.51
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.66

Context: 154

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-88)

Santo Tomás · copper

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.65
- Grade Unit: %
- Intercept: 14 m
- From: 287 m
- To: 301 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:287-301
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.83
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A high copper equivalent grade over a reasonable width, contributing significantly to the resource.

- Positive factor: High copper equivalent grade over a reasonable width.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.65

Context: 14

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-89)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0
- Grade Unit: %
- Intercept: 14 m
- From: 287 m
- To: 301 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:287-301
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.83
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: No molybdenum grade reported for this interval.

Evidence · table

> 0.000

Context: 14

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-90)

Santo Tomás · gold

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.132
- Grade Unit: ppm
- Intercept: 14 m
- From: 287 m
- To: 301 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:287-301
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.83
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.132

Context: 14

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-91)

Santo Tomás · silver

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 3.29
- Grade Unit: ppm
- Intercept: 14 m
- From: 287 m
- To: 301 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:287-301
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.83
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 3.29

Context: 14

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-92)

Santo Tomás · copper

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.3
- Grade Unit: %
- Intercept: 12 m
- From: 307 m
- To: 319 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:307-319
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A moderate copper equivalent grade over a narrow width.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.30

Context: 12

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-93)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.003
- Grade Unit: %
- Intercept: 12 m
- From: 307 m
- To: 319 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:307-319
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.003

Context: 12

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-94)

Santo Tomás · gold

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.036
- Grade Unit: ppm
- Intercept: 12 m
- From: 307 m
- To: 319 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:307-319
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.036

Context: 12

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S040

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-95)

Santo Tomás · silver

#### Identity

- Hole ID: S040
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.08
- Grade Unit: ppm
- Intercept: 12 m
- From: 307 m
- To: 319 m
- Intercept Depth: 131 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S040:307-319
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779069
- Northing: 2975263
- Elevation: 761 m
- Azimuth: 100 °
- Dip: -55 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.08

Context: 12

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S041

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-96)

Santo Tomás · copper

#### Identity

- Hole ID: S041
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.25
- Grade Unit: %
- Intercept: 211.7 m
- From: 73.5 m
- To: 285.2 m
- Intercept Depth: 73.5 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S041:73.5-285.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779179
- Northing: 2974813
- Elevation: 813 m
- Azimuth: 155 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.32
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A very long intercept with moderate copper equivalent grade, extending mineralization beyond the current pit limits.

- Positive factor: Very long intercept length, confirming continuity of mineralization.

- Positive factor: Ended in mineralization approximately 90 m vertically below the current PEA pit limit, indicating potential for mineralization beyond the current pit shell.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.25

Context: 211.7

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S041

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-97)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S041
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.008
- Grade Unit: %
- Intercept: 211.7 m
- From: 73.5 m
- To: 285.2 m
- Intercept Depth: 73.5 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S041:73.5-285.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779179
- Northing: 2974813
- Elevation: 813 m
- Azimuth: 155 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.32
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.008

Context: 211.7

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S041

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-98)

Santo Tomás · gold

#### Identity

- Hole ID: S041
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.014
- Grade Unit: ppm
- Intercept: 211.7 m
- From: 73.5 m
- To: 285.2 m
- Intercept Depth: 73.5 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S041:73.5-285.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779179
- Northing: 2974813
- Elevation: 813 m
- Azimuth: 155 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.32
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.014

Context: 211.7

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S041

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-99)

Santo Tomás · silver

#### Identity

- Hole ID: S041
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.33
- Grade Unit: ppm
- Intercept: 211.7 m
- From: 73.5 m
- To: 285.2 m
- Intercept Depth: 73.5 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S041:73.5-285.2
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779179
- Northing: 2974813
- Elevation: 813 m
- Azimuth: 155 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.32
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.33

Context: 211.7

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S041

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-100)

Santo Tomás · copper

#### Identity

- Hole ID: S041
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.3
- Grade Unit: %
- Intercept: 249.7 m
- From: 289.3 m
- To: 539 m
- Intercept Depth: 73.5 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S041:289.3-539
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779179
- Northing: 2974813
- Elevation: 813 m
- Azimuth: 155 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A very long intercept with moderate copper equivalent grade, extending mineralization beyond the current pit limits.

- Positive factor: Very long intercept length, confirming continuity of mineralization.

- Positive factor: Ended in mineralization approximately 90 m vertically below the current PEA pit limit, indicating potential for mineralization beyond the current pit shell.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.30

Context: 249.7

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S041

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-101)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S041
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.01
- Grade Unit: %
- Intercept: 249.7 m
- From: 289.3 m
- To: 539 m
- Intercept Depth: 73.5 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S041:289.3-539
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779179
- Northing: 2974813
- Elevation: 813 m
- Azimuth: 155 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.010

Context: 249.7

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S041

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-102)

Santo Tomás · gold

#### Identity

- Hole ID: S041
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.01
- Grade Unit: ppm
- Intercept: 249.7 m
- From: 289.3 m
- To: 539 m
- Intercept Depth: 73.5 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S041:289.3-539
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779179
- Northing: 2974813
- Elevation: 813 m
- Azimuth: 155 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.010

Context: 249.7

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S041

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-103)

Santo Tomás · silver

#### Identity

- Hole ID: S041
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.66
- Grade Unit: ppm
- Intercept: 249.7 m
- From: 289.3 m
- To: 539 m
- Intercept Depth: 73.5 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S041:289.3-539
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 779179
- Northing: 2974813
- Elevation: 813 m
- Azimuth: 155 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.36
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 1.66

Context: 249.7

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S042

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-104)

Santo Tomás · copper

#### Identity

- Hole ID: S042
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.34
- Grade Unit: %
- Intercept: 369.3 m
- From: 0 m
- To: 369.3 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S042:0-369.3
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778951
- Northing: 2974702
- Elevation: 717 m
- Azimuth: 120 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: An exceptional, very long intercept from surface with strong copper equivalent grade, significantly improving resource confidence in the high-grade zone.

- Positive factor: Exceptional intercept length from surface with strong copper equivalent grade.

- Positive factor: Infill hole within the higher-grade S018 area of the South Zone, improving resource confidence.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.34

Context: 369.3

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S042

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-105)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S042
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.018
- Grade Unit: %
- Intercept: 369.3 m
- From: 0 m
- To: 369.3 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S042:0-369.3
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778951
- Northing: 2974702
- Elevation: 717 m
- Azimuth: 120 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.018

Context: 369.3

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S042

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-106)

Santo Tomás · gold

#### Identity

- Hole ID: S042
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.015
- Grade Unit: ppm
- Intercept: 369.3 m
- From: 0 m
- To: 369.3 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S042:0-369.3
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778951
- Northing: 2974702
- Elevation: 717 m
- Azimuth: 120 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low gold grade, contributing to the overall CuEq.

Evidence · table

> 0.015

Context: 369.3

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S042

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-107)

Santo Tomás · silver

#### Identity

- Hole ID: S042
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 2.42
- Grade Unit: ppm
- Intercept: 369.3 m
- From: 0 m
- To: 369.3 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S042:0-369.3
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778951
- Northing: 2974702
- Elevation: 717 m
- Azimuth: 120 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.45
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Low silver grade, contributing to the overall CuEq.

Evidence · table

> 2.42

Context: 369.3

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S042

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-108)

Santo Tomás · copper

#### Identity

- Hole ID: S042
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.13
- Grade Unit: %
- Intercept: 22.8 m
- From: 370.3 m
- To: 393.1 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S042:370.3-393.1
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778951
- Northing: 2974702
- Elevation: 717 m
- Azimuth: 120 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.2
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: A low copper equivalent grade over a narrow width, consistent with the block model.

- Negative factor: Low copper equivalent grade, barely above cutoff.

- Negative factor: Interval is reported as downhole length, true width not confirmed.

Evidence · table

> 0.13

Context: 22.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S042

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-109)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S042
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.014
- Grade Unit: %
- Intercept: 22.8 m
- From: 370.3 m
- To: 393.1 m
- Intercept Depth: 0 m

#### Classification

- Deposit Type: porphyry
- Program: resource
- Sample Type: drill
- Group ID: S042:370.3-393.1
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Easting: 778951
- Northing: 2974702
- Elevation: 717 m
- Azimuth: 120 °
- Dip: -45 °
- Loc. Confidence: high
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Metal Eq. Grade: 0.2
- Metal Eq. Unit: % CuEq
- Assumptions Disclosed: Yes

#### Compositing

- Cutoff Grade: 0.15
- Cutoff Unit: % Cu
- Max Dilution: 4 m

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Moderate molybdenum grade, contributing to the overall CuEq.

Evidence · table

> 0.014

Context: 22.8

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Infill Drilling**

Polarity: neutral

Definition: Confirmatory drilling to raise resource confidence, not new discovery.

Why it applies: drill\_program\_type is "resource"

### S042

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-110)

Santo Tomás · gold

#### Identity

- Hole ID: S042
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.008
- Grade Unit: ppm
- Intercept: 22.8 m
- From: 370.3 m
- To: 393.1 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S042:370.3-393.1
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.008 ppm gold, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the gold rubric unit g/t; not scored.

Evidence · table

> 0.008

Context: S042

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S042

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-111)

Santo Tomás · silver

#### Identity

- Hole ID: S042
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.1
- Grade Unit: ppm
- Intercept: 22.8 m
- From: 370.3 m
- To: 393.1 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S042:370.3-393.1
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 1.1 ppm silver, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the silver rubric unit g/t; not scored.

Evidence · table

> 1.10

Context: S042

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S043

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-112)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S043
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.016
- Grade Unit: %
- Intercept: 94.6 m
- From: 0 m
- To: 94.6 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S043:0-94.6
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.016 % molybdenum. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for molybdenum; intercept not scored.

Evidence · table

> 0.016

Context: S043

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S043

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-113)

Santo Tomás · gold

#### Identity

- Hole ID: S043
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.019
- Grade Unit: ppm
- Intercept: 94.6 m
- From: 0 m
- To: 94.6 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S043:0-94.6
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.019 ppm gold, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the gold rubric unit g/t; not scored.

Evidence · table

> 0.019

Context: S043

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S043

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-114)

Santo Tomás · silver

#### Identity

- Hole ID: S043
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.54
- Grade Unit: ppm
- Intercept: 94.6 m
- From: 0 m
- To: 94.6 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S043:0-94.6
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 1.54 ppm silver, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the silver rubric unit g/t; not scored.

Evidence · table

> 1.54

Context: S043

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S043

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-115)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S043
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.025
- Grade Unit: %
- Intercept: 46.4 m
- From: 232.6 m
- To: 279 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S043:232.6-279
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.025 % molybdenum. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for molybdenum; intercept not scored.

Evidence · table

> 0.025

Context: S043

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S043

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-116)

Santo Tomás · gold

#### Identity

- Hole ID: S043
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.009
- Grade Unit: ppm
- Intercept: 46.4 m
- From: 232.6 m
- To: 279 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S043:232.6-279
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.009 ppm gold, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the gold rubric unit g/t; not scored.

Evidence · table

> 0.009

Context: S043

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S043

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-117)

Santo Tomás · silver

#### Identity

- Hole ID: S043
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.97
- Grade Unit: ppm
- Intercept: 46.4 m
- From: 232.6 m
- To: 279 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S043:232.6-279
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.97 ppm silver, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the silver rubric unit g/t; not scored.

Evidence · table

> 0.97

Context: S043

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S043

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-118)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S043
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.019
- Grade Unit: %
- Intercept: 18 m
- From: 295 m
- To: 313 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S043:295-313
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.019 % molybdenum. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for molybdenum; intercept not scored.

Evidence · table

> 0.019

Context: S043

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S043

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-119)

Santo Tomás · gold

#### Identity

- Hole ID: S043
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.01
- Grade Unit: ppm
- Intercept: 18 m
- From: 295 m
- To: 313 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S043:295-313
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.01 ppm gold, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the gold rubric unit g/t; not scored.

Evidence · table

> 0.010

Context: S043

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S043

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-120)

Santo Tomás · silver

#### Identity

- Hole ID: S043
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.56
- Grade Unit: ppm
- Intercept: 18 m
- From: 295 m
- To: 313 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S043:295-313
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.56 ppm silver, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the silver rubric unit g/t; not scored.

Evidence · table

> 0.56

Context: S043

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S044

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-121)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S044
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.017
- Grade Unit: %
- Intercept: 213 m
- From: 0 m
- To: 213 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S044:0-213
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.017 % molybdenum. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for molybdenum; intercept not scored.

Evidence · table

> 0.017

Context: S044

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S044

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-122)

Santo Tomás · gold

#### Identity

- Hole ID: S044
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.01
- Grade Unit: ppm
- Intercept: 213 m
- From: 0 m
- To: 213 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S044:0-213
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.01 ppm gold, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the gold rubric unit g/t; not scored.

Evidence · table

> 0.010

Context: S044

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S044

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-123)

Santo Tomás · silver

#### Identity

- Hole ID: S044
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 1.66
- Grade Unit: ppm
- Intercept: 213 m
- From: 0 m
- To: 213 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S044:0-213
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 1.66 ppm silver, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the silver rubric unit g/t; not scored.

Evidence · table

> 1.66

Context: S044

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S044

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-124)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S044
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.026
- Grade Unit: %
- Intercept: 10 m
- From: 219 m
- To: 229 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S044:219-229
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.026 % molybdenum. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for molybdenum; intercept not scored.

Evidence · table

> 0.026

Context: S044

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S044

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-125)

Santo Tomás · gold

#### Identity

- Hole ID: S044
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.009
- Grade Unit: ppm
- Intercept: 10 m
- From: 219 m
- To: 229 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S044:219-229
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.009 ppm gold, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the gold rubric unit g/t; not scored.

Evidence · table

> 0.009

Context: S044

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

### S044

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-continues-south-zone-success--ddf113e3-6e90-4deb-9087-f235effb604b#fact-drill-facts-126)

Santo Tomás · silver

#### Identity

- Hole ID: S044
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: mexico
- Ticker: OCO

#### Geometry

- Grade: 0.45
- Grade Unit: ppm
- Intercept: 10 m
- From: 219 m
- To: 229 m

#### Classification

- Deposit Type: porphyry
- Sample Type: drill
- Group ID: S044:219-229
- Mining Method: open\_pit

#### Location

- Location: South Zone
- Loc. Source: document

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, duplicates

#### Metal Equivalent

- Assumptions Disclosed: Yes

#### Review

- Needs Review: No
- Interp. Status: scored
- Historical: No

#### Dates

- Event date: 2026-09-10T00:00:00.000Z

Reasoning: Expanded from assay table: 0.45 ppm silver, reported in a unit the rubric does not cover \(g/t\).

- Negative factor: Grade unit ppm does not match the silver rubric unit g/t; not scored.

Evidence · table

> 0.45

Context: S044

#### Tags used in scoring

**QA/QC Disclosed**

Polarity: positive

Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\).

Why it applies: qaqc\_disclosed is true

**Cut-off Undisclosed**

Polarity: negative

Definition: High-grade interval reported without stating the cut-off grade used for compositing.

Why it applies: no cutoff\_grade was stated

## How Atlas produces this analysis

Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.