# Oroco Increases South Zone Certainty at Santo Tom&\#xE1;s

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f

Original source: https://money.tmx.com/en/quote/OCO/news/7821281160549232/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s

Publisher: tmx

Original announcement: 2026-06-18T11:00:00.000Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Oroco Resource Corp.

- Ticker: OCO

- Exchange: TSX

- Region: Sinaloa, Mexico

- Primary commodity: Copper

- Secondary commodities: Molybdenum, Gold, Silver

- Document categories: Drill results, Resource update

- Extracted: 2026-08-24 02:30:52 UTC

Narrative sentiment: 0.60 · Bullish

## Minestarters Atlas summary

Oroco reports Phase 2 drill results from the South Zone of the Santo Tomás copper project, confirming mineralization consistent with the 2024 PEA block model. The program aims to convert Inferred resources to Indicated to support an upcoming Pre-Feasibility Study.

Reasoning: Phase 2 infill drilling confirms existing block model and provides evidence of mineralization extension, supporting the path to PFS.

- Positive factor: Results consistent with PEA block model

- Positive factor: Infill drilling increasing resource certainty

- Positive factor: Visual mineralization extending beyond inferred resource \(S031\)

- Negative factor: Metal equivalent assumptions differ from previous PEA

Facts used in scoring: 35

## Classification and evidence

**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: Release includes details on certified reference standards, blanks, duplicates, and lab names \(ALS\).

Evidence · text

> insertion of certified reference standards, blanks, and duplicates

**Infill Drilling**

Polarity: neutral

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

Why it applies: Holes S025 and S029 are explicitly described as infill drilling for block model support.

Evidence · text

> Infill drilling for block model support

## Extracted facts

Stored fact records: 35. Some facts used in scoring do not have a stored record.

## Drill Results (35)

### S025

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-0)

Santo Tomás · copper

#### Identity

- Hole ID: S025
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.29
- Grade Unit: %
- Intercept: 84.94 m
- From: 37 m
- To: 121.94 m

#### Classification

- Sample Type: drill
- Group ID: S025:37-121.94
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Standard infill intercept confirming model.

- Positive factor: Consistent with PEA block model

Evidence · table

> 0.29

Context: 84.94

### S025

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-1)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S025
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.005
- Grade Unit: %
- Intercept: 84.94 m
- From: 37 m
- To: 121.94 m

#### Classification

- Sample Type: drill
- Group ID: S025:37-121.94
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Trace molybdenum.

Evidence · table

> 0.005

Context: 84.94

### S025

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-2)

Santo Tomás · gold

#### Identity

- Hole ID: S025
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.014
- Grade Unit: ppm
- Intercept: 84.94 m
- From: 37 m
- To: 121.94 m

#### Classification

- Sample Type: drill
- Group ID: S025:37-121.94
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Trace gold.

Evidence · table

> 0.014

Context: 84.94

### S025

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-3)

Santo Tomás · silver

#### Identity

- Hole ID: S025
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 1.65
- Grade Unit: ppm
- Intercept: 84.94 m
- From: 37 m
- To: 121.94 m

#### Classification

- Sample Type: drill
- Group ID: S025:37-121.94
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Trace silver.

Evidence · table

> 1.65

Context: 84.94

### S025

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-4)

Santo Tomás · copper

#### Identity

- Hole ID: S025
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.41
- Grade Unit: %
- Intercept: 90 m
- From: 131 m
- To: 221 m

#### Classification

- Sample Type: drill
- Group ID: S025:131-221
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Higher grade interval in deeper section.

- Positive factor: Stronger mineralization than S024

Evidence · table

> 0.41

Context: 90

### S025

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-5)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S025
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.022
- Grade Unit: %
- Intercept: 90 m
- From: 131 m
- To: 221 m

#### Classification

- Sample Type: drill
- Group ID: S025:131-221
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Elevated Mo noted in deeper section.

- Positive factor: Higher molybdenum in deeper interval

Evidence · table

> 0.022

Context: 90

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-6)

Santo Tomás · copper

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.56
- Grade Unit: %
- Intercept: 48.6 m
- From: 42 m
- To: 90.6 m

#### Classification

- Sample Type: drill
- Group ID: S026:42-90.6
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Strong intercept in shallower part of hole.

- Positive factor: Higher grade near top of hole

Evidence · table

> 0.56

Context: 48.6

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-7)

Santo Tomás · molybdenum

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: molybdenum
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.015
- Grade Unit: %
- Intercept: 48.6 m
- From: 42 m
- To: 90.6 m

#### Classification

- Sample Type: drill
- Group ID: S026:42-90.6
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Trace molybdenum.

Evidence · table

> 0.015

Context: 48.6

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-8)

Santo Tomás · gold

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.017
- Grade Unit: ppm
- Intercept: 48.6 m
- From: 42 m
- To: 90.6 m

#### Classification

- Sample Type: drill
- Group ID: S026:42-90.6
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Higher gold noted in shallow section.

- Positive factor: Notably higher Au grades near top

Evidence · table

> 0.017

Context: 48.6

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-9)

Santo Tomás · silver

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 3.12
- Grade Unit: ppm
- Intercept: 48.6 m
- From: 42 m
- To: 90.6 m

#### Classification

- Sample Type: drill
- Group ID: S026:42-90.6
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Trace silver.

Evidence · table

> 3.12

Context: 48.6

### S028

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-10)

Santo Tomás · copper

#### Identity

- Hole ID: S028
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.38
- Grade Unit: %
- Intercept: 44.52 m
- From: 44 m
- To: 88.52 m

#### Classification

- Sample Type: drill
- Group ID: S028:44-88.52
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Intercept tests western limits.

- Positive factor: Suggests deeper westward mineralization

Evidence · table

> 0.38

Context: 44.52

### S029

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-11)

Santo Tomás · copper

#### Identity

- Hole ID: S029
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.35
- Grade Unit: %
- Intercept: 58.76 m
- From: 27 m
- To: 85.76 m

#### Classification

- Sample Type: drill
- Group ID: S029:27-85.76
- Mining Method: open\_pit

#### QA/QC

- Laboratory: ALS Chemex
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Infill hole intersecting shallow mineralization.

- Positive factor: Very near surface mineralization

- Positive factor: Reduces strip compared to block model

Evidence · table

> 0.35

Context: 58.76

### S025

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-12)

Santo Tomás · mo

#### Identity

- Hole ID: S025
- Project: Santo Tomás
- Commodity: mo
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.005
- Grade Unit: %
- Intercept: 84.94 m
- From: 37 m
- To: 121.94 m

#### Classification

- Sample Type: drill
- Group ID: S025:37-121.94
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.005 % mo. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for mo; intercept not scored.

Evidence · table

> 0.005

Context: S025

### S025

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-13)

Santo Tomás · mo

#### Identity

- Hole ID: S025
- Project: Santo Tomás
- Commodity: mo
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.022
- Grade Unit: %
- Intercept: 90 m
- From: 131 m
- To: 221 m

#### Classification

- Sample Type: drill
- Group ID: S025:131-221
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.022 % mo. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for mo; intercept not scored.

Evidence · table

> 0.022

Context: S025

### S025

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-14)

Santo Tomás · gold

#### Identity

- Hole ID: S025
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.01
- Grade Unit: ppm
- Intercept: 90 m
- From: 131 m
- To: 221 m

#### Classification

- Sample Type: drill
- Group ID: S025:131-221
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

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

> 0.01

Context: S025

### S025

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-15)

Santo Tomás · silver

#### Identity

- Hole ID: S025
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 2.38
- Grade Unit: ppm
- Intercept: 90 m
- From: 131 m
- To: 221 m

#### Classification

- Sample Type: drill
- Group ID: S025:131-221
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 2.38 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

> 2.38

Context: S025

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-16)

Santo Tomás · mo

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: mo
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.015
- Grade Unit: %
- Intercept: 48.6 m
- From: 42 m
- To: 90.6 m

#### Classification

- Sample Type: drill
- Group ID: S026:42-90.6
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.015 % mo. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for mo; intercept not scored.

Evidence · table

> 0.015

Context: S026

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-17)

Santo Tomás · copper

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.2
- Grade Unit: %
- Intercept: 59 m
- From: 93 m
- To: 152 m

#### Classification

- Sample Type: drill
- Group ID: S026:93-152
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table. 0.2 % copper is below against the default band \[2.5, 1, 0.5, 0.25\] %. Grade×width 11.8 %·m is below.

- Negative factor: 0.2 % copper is below the weak threshold \(0.25 %\) on the default band.

- Negative factor: Scored from rubric bands during table expansion, not from document context.

Evidence · table

> 0.2

Context: S026

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-18)

Santo Tomás · mo

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: mo
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.026
- Grade Unit: %
- Intercept: 59 m
- From: 93 m
- To: 152 m

#### Classification

- Sample Type: drill
- Group ID: S026:93-152
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.026 % mo. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for mo; intercept not scored.

Evidence · table

> 0.026

Context: S026

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-19)

Santo Tomás · gold

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.008
- Grade Unit: ppm
- Intercept: 59 m
- From: 93 m
- To: 152 m

#### Classification

- Sample Type: drill
- Group ID: S026:93-152
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

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: S026

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-20)

Santo Tomás · silver

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 1.44
- Grade Unit: ppm
- Intercept: 59 m
- From: 93 m
- To: 152 m

#### Classification

- Sample Type: drill
- Group ID: S026:93-152
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 1.44 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

> 1.44

Context: S026

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-21)

Santo Tomás · copper

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.16
- Grade Unit: %
- Intercept: 23.45 m
- From: 280 m
- To: 303.45 m

#### Classification

- Sample Type: drill
- Group ID: S026:280-303.45
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table. 0.16 % copper is below against the default band \[2.5, 1, 0.5, 0.25\] %. Grade×width 3.8 %·m is below.

- Negative factor: 0.16 % copper is below the weak threshold \(0.25 %\) on the default band.

- Negative factor: Scored from rubric bands during table expansion, not from document context.

Evidence · table

> 0.16

Context: S026

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-22)

Santo Tomás · mo

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: mo
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.013
- Grade Unit: %
- Intercept: 23.45 m
- From: 280 m
- To: 303.45 m

#### Classification

- Sample Type: drill
- Group ID: S026:280-303.45
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.013 % mo. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for mo; intercept not scored.

Evidence · table

> 0.013

Context: S026

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-23)

Santo Tomás · gold

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.011
- Grade Unit: ppm
- Intercept: 23.45 m
- From: 280 m
- To: 303.45 m

#### Classification

- Sample Type: drill
- Group ID: S026:280-303.45
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.011 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

> 0.011

Context: S026

### S026

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-24)

Santo Tomás · silver

#### Identity

- Hole ID: S026
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 1.56
- Grade Unit: ppm
- Intercept: 23.45 m
- From: 280 m
- To: 303.45 m

#### Classification

- Sample Type: drill
- Group ID: S026:280-303.45
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 1.56 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

> 1.56

Context: S026

### S028

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-25)

Santo Tomás · mo

#### Identity

- Hole ID: S028
- Project: Santo Tomás
- Commodity: mo
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.013
- Grade Unit: %
- Intercept: 44.52 m
- From: 44 m
- To: 88.52 m

#### Classification

- Sample Type: drill
- Group ID: S028:44-88.52
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.013 % mo. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for mo; intercept not scored.

Evidence · table

> 0.013

Context: S028

### S028

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-26)

Santo Tomás · gold

#### Identity

- Hole ID: S028
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.01
- Grade Unit: ppm
- Intercept: 44.52 m
- From: 44 m
- To: 88.52 m

#### Classification

- Sample Type: drill
- Group ID: S028:44-88.52
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

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

> 0.01

Context: S028

### S028

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-27)

Santo Tomás · silver

#### Identity

- Hole ID: S028
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 1.83
- Grade Unit: ppm
- Intercept: 44.52 m
- From: 44 m
- To: 88.52 m

#### Classification

- Sample Type: drill
- Group ID: S028:44-88.52
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 1.83 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

> 1.83

Context: S028

### S029

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-28)

Santo Tomás · mo

#### Identity

- Hole ID: S029
- Project: Santo Tomás
- Commodity: mo
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.009
- Grade Unit: %
- Intercept: 58.76 m
- From: 27 m
- To: 85.76 m

#### Classification

- Sample Type: drill
- Group ID: S029:27-85.76
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.009 % mo. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for mo; intercept not scored.

Evidence · table

> 0.009

Context: S029

### S029

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-29)

Santo Tomás · gold

#### Identity

- Hole ID: S029
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.018
- Grade Unit: ppm
- Intercept: 58.76 m
- From: 27 m
- To: 85.76 m

#### Classification

- Sample Type: drill
- Group ID: S029:27-85.76
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.018 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

> 0.018

Context: S029

### S029

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-30)

Santo Tomás · silver

#### Identity

- Hole ID: S029
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 2.22
- Grade Unit: ppm
- Intercept: 58.76 m
- From: 27 m
- To: 85.76 m

#### Classification

- Sample Type: drill
- Group ID: S029:27-85.76
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 2.22 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

> 2.22

Context: S029

### S029

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-31)

Santo Tomás · copper

#### Identity

- Hole ID: S029
- Project: Santo Tomás
- Commodity: copper
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.29
- Grade Unit: %
- Intercept: 16.01 m
- From: 87.32 m
- To: 103.33 m

#### Classification

- Sample Type: drill
- Group ID: S029:87.32-103.33
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table. 0.29 % copper is weak against the default band \[2.5, 1, 0.5, 0.25\] %. Grade×width 4.6 %·m is below \(grade alone is weak; the better of the two is used\).

- Negative factor: Scored from rubric bands during table expansion, not from document context.

Evidence · table

> 0.29

Context: S029

### S029

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-32)

Santo Tomás · mo

#### Identity

- Hole ID: S029
- Project: Santo Tomás
- Commodity: mo
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.007
- Grade Unit: %
- Intercept: 16.01 m
- From: 87.32 m
- To: 103.33 m

#### Classification

- Sample Type: drill
- Group ID: S029:87.32-103.33
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.007 % mo. No grade band defined for this commodity, so the score is a placeholder.

- Negative factor: No grade rubric for mo; intercept not scored.

Evidence · table

> 0.007

Context: S029

### S029

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-33)

Santo Tomás · gold

#### Identity

- Hole ID: S029
- Project: Santo Tomás
- Commodity: gold
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 0.007
- Grade Unit: ppm
- Intercept: 16.01 m
- From: 87.32 m
- To: 103.33 m

#### Classification

- Sample Type: drill
- Group ID: S029:87.32-103.33
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 0.007 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

> 0.007

Context: S029

### S029

[Link to this fact](https://atlas-staging.minestarters.com/news/oroco-increases-south-zone-certainty-at-santo-tom-xe1-s--8739bf19-d81b-482e-a9e4-16fc9722c48f#fact-drill-facts-34)

Santo Tomás · silver

#### Identity

- Hole ID: S029
- Project: Santo Tomás
- Commodity: silver
- Region: mexico
- Reported Region: Sinaloa, Mexico
- Ticker: OCO

#### Geometry

- Grade: 1.71
- Grade Unit: ppm
- Intercept: 16.01 m
- From: 87.32 m
- To: 103.33 m

#### Classification

- Sample Type: drill
- Group ID: S029:87.32-103.33
- Mining Method: open\_pit

#### Review

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

#### Dates

- Event date: 2026-06-18T00:00:00.000Z

Reasoning: Expanded from assay table: 1.71 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

> 1.71

Context: S029

## 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.