# Sendero Resources Reports Drilling Results at Peñas Negras Project; Confirms Geological Model and Identifies Geochemical Vectors in Vicuña Belt, Argentina

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/sendero-resources-reports-drilling-results-at-pen-as-negras-project-confirms-geo--0695bb5f-7411-4a4c-a475-fbffdaaecd87

Original source: https://www.thenewswire.com/press-releases/1kogFdEXj-sendero-resources-reports-drilling-results-at-penas-negras-project-confirms-geological-model-and-identifies-geochemical-vectors-in-vicuna-belt-argentina.html

Publisher: thenewswire

Original announcement: 2026-08-18T17:28:03.067Z

Analysis by Minestarters Atlas

Atlas analysis published: Unknown date

Atlas analysis updated: Unknown date

- Company: Sendero Resources Corp.

- Ticker: SEND

- Exchange: Unavailable

- Region: La Rioja, Argentina

- Primary commodity: Gold

- Secondary commodities: Silver, Copper, Molybdenum, Antimony, Arsenic, Lead, Zinc

- Document categories: Drill results, Other

- Extracted: 2026-08-24 04:14:52 UTC

Narrative sentiment: 0.70 · Bullish

## Minestarters Atlas summary

Sendero Resources has confirmed its porphyry-epithermal geological model at the Peñas Negras Project through reconnaissance drilling and rock sampling. The program identified near-surface gold and silver mineralization, along with geochemical vectors like antimony, supporting the potential for a larger hydrothermal system.

Reasoning: The drilling confirms the porphyry-epithermal model with gold and silver intercepts and identifies key pathfinder elements, though it is early-stage reconnaissance.

- Positive factor: Confirmation of geological model

- Positive factor: Presence of geochemical vectors

- Positive factor: Near-surface mineralization in all holes

- Positive factor: Strong rock sampling results

- Negative factor: True widths unknown

- Negative factor: Reconnaissance stage

Facts used in scoring: 5

## 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 mentions SGS lab, ISO/IEC 17025 accreditation, and use of standards, blanks, and duplicates.

Evidence · text

> Certified reference materials \(standards\), blank samples, and field duplicates \(quarter core samples\) were inserted into sampling stream at a rate of approximately 8%.

**Apparent Width Only**

Polarity: negative

Definition: Interval given as downhole width with no true width or drill orientation — apparent width may overstate true thickness.

Why it applies: The document explicitly states that true widths are unknown at this stage.

Evidence · text

> True widths are unknown at this stage.

## Extracted facts

Stored fact records: 5. Some facts used in scoring do not have a stored record.

## Drill Results (5)

### PNDH-201

[Link to this fact](https://atlas-staging.minestarters.com/news/sendero-resources-reports-drilling-results-at-pen-as-negras-project-confirms-geo--0695bb5f-7411-4a4c-a475-fbffdaaecd87#fact-drill-facts-0)

Peñas Negras Project · gold

#### Identity

- Hole ID: PNDH-201
- Project: Peñas Negras Project
- Commodity: gold
- Region: argentina
- Reported Region: La Rioja, Argentina
- Ticker: SEND

#### Geometry

- Grade: 1.04
- Grade Unit: g/t
- Intercept: 1.5 m
- From: 14 m
- To: 15.5 m

#### Classification

- Sample Type: drill
- Group ID: PNDH-201:14.0-15.5
- Mining Method: unknown

#### Location

- Loc. Confidence: medium

#### QA/QC

- Laboratory: SGS
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, standards, duplicates

#### Review

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

#### Dates

- Event date: 2026-08-18T00:00:00.000Z

Reasoning: 1.04 g/t Au over 1.5m is a solid reconnaissance intercept for an epithermal target.

- Positive factor: Gold intercept in reconnaissance hole

- Negative factor: Narrow interval

Evidence · text

> PNDH-201 returning 1.04 g/t Au over 1.5 m from 14.0 m

### PNDH-201

[Link to this fact](https://atlas-staging.minestarters.com/news/sendero-resources-reports-drilling-results-at-pen-as-negras-project-confirms-geo--0695bb5f-7411-4a4c-a475-fbffdaaecd87#fact-drill-facts-1)

Peñas Negras Project · silver

#### Identity

- Hole ID: PNDH-201
- Project: Peñas Negras Project
- Commodity: silver
- Region: argentina
- Reported Region: La Rioja, Argentina
- Ticker: SEND

#### Geometry

- Grade: 48
- Grade Unit: g/t
- Intercept: 1.5 m
- From: 14 m
- To: 15.5 m

#### Classification

- Sample Type: drill
- Group ID: PNDH-201:14.0-15.5
- Mining Method: unknown

#### Location

- Loc. Confidence: medium

#### QA/QC

- Laboratory: SGS
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, standards, duplicates

#### Review

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

#### Dates

- Event date: 2026-08-18T00:00:00.000Z

Reasoning: 48 g/t Ag over 1.5m is a strong silver intercept accompanying the gold.

- Positive factor: Strong silver anomaly

Evidence · text

> 48 g/t Ag over 1.5 m from 14.0 m

### PNDH-201

[Link to this fact](https://atlas-staging.minestarters.com/news/sendero-resources-reports-drilling-results-at-pen-as-negras-project-confirms-geo--0695bb5f-7411-4a4c-a475-fbffdaaecd87#fact-drill-facts-2)

Peñas Negras Project · silver

#### Identity

- Hole ID: PNDH-201
- Project: Peñas Negras Project
- Commodity: silver
- Region: argentina
- Reported Region: La Rioja, Argentina
- Ticker: SEND

#### Geometry

- Grade: 28.2
- Grade Unit: g/t
- Intercept: 1 m
- From: 57 m
- To: 58 m

#### Classification

- Sample Type: drill
- Group ID: PNDH-201:57.0-58.0
- Mining Method: unknown

#### Location

- Loc. Confidence: medium

#### QA/QC

- Laboratory: SGS
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, standards, duplicates

#### Review

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

#### Dates

- Event date: 2026-08-18T00:00:00.000Z

Reasoning: 28.2 g/t Ag over 1.0m is a secondary silver anomaly.

- Positive factor: Silver anomaly

Evidence · text

> 28.2 g/t Ag over 1.0 m from 57.0 m in PNDH-201

### PNDH-201

[Link to this fact](https://atlas-staging.minestarters.com/news/sendero-resources-reports-drilling-results-at-pen-as-negras-project-confirms-geo--0695bb5f-7411-4a4c-a475-fbffdaaecd87#fact-drill-facts-3)

Peñas Negras Project · gold

#### Identity

- Hole ID: PNDH-201
- Project: Peñas Negras Project
- Commodity: gold
- Region: argentina
- Reported Region: La Rioja, Argentina
- Ticker: SEND

#### Geometry

- Grade: 0.11
- Grade Unit: ppm
- Intercept: 32 m
- From: 0 m
- To: 46 m

#### Classification

- Sample Type: drill
- Group ID: PNDH-201:0.0-46.0
- Mining Method: unknown

#### Location

- Loc. Confidence: medium

#### QA/QC

- Laboratory: SGS
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, standards, duplicates

#### Review

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

#### Dates

- Event date: 2026-08-18T00:00:00.000Z

Reasoning: A broad halo of 0.11 ppm Au over 46m provides geological context.

- Positive factor: Broad halo of gold

Evidence · text

> weighted average of 0.11 ppm Au for this interval

### PNDH-203

[Link to this fact](https://atlas-staging.minestarters.com/news/sendero-resources-reports-drilling-results-at-pen-as-negras-project-confirms-geo--0695bb5f-7411-4a4c-a475-fbffdaaecd87#fact-drill-facts-4)

Peñas Negras Project · antimony

#### Identity

- Hole ID: PNDH-203
- Project: Peñas Negras Project
- Commodity: antimony
- Region: argentina
- Reported Region: La Rioja, Argentina
- Ticker: SEND

#### Classification

- Sample Type: drill
- Mining Method: unknown

#### Location

- Loc. Confidence: medium

#### QA/QC

- Laboratory: SGS
- QA/QC Disclosed: Yes
- Lab Certified: Yes
- QP Signed: Yes
- QA/QC Methods: blanks, standards, duplicates

#### Review

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

#### Dates

- Event date: 2026-08-18T00:00:00.000Z

Reasoning: Anomalous antimony in PNDH-203 acts as a geochemical vector.

- Positive factor: Antimony anomaly supports epithermal model

Evidence · text

> The hole also returned anomalous antimony values

## 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.