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

Original announcement by tmx on Aug 17, 2026

Bullish

Company: Sendero Resources Corp.
Ticker: SEND
Exchange: TSX
Region: La Rioja, Argentina
Primary commodity: Gold
Secondary commodities: Silver
Document categories: Drill results
Extracted: 2026-08-22 10:24:00 UTC

Minestarters Atlas analysis

Summary

Sendero Resources has confirmed its porphyry-epithermal geological model at the Peñas Negras Project through reconnaissance diamond drilling and rock sampling. The program identified gold and silver mineralization, a significant leached cap, and geochemical vectors consistent with high-sulfidation epithermal systems.

Reasoning: Reconnaissance drilling confirmed the porphyry-epithermal model with gold and silver intercepts and identified key geochemical vectors (Sb, As, Cu, Mo, Pb, Zn) and a leached cap.

Positive factors

Confirmation of geological model
Presence of geochemical vectors
Discovery of leached cap
Strong surface geochemistry

Negative factors

True widths unknown

Facts used in scoring: 4

Atlas analysis — Sendero Resources Corp.: Sendero Resources Reports Drilling Results at Peñas Negras Project; Confirms Geological Model and Identifies Geochemical Vectors in Vicuña Belt, Argentina. 1.04 g/t over 1.5 m

Classification and evidence

QA/QC Disclosedpositive

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

Why it applies: Release details SGS lab, ISO/IEC 17025 accreditation, and use of standards, blanks, and duplicates.

Evidence · text

“The SGS testing laboratory in Callao, Peru, holds ISO/IEC 17025 accreditation”

Apparent Width Onlynegative

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: 4. Some facts used in scoring do not have a stored record.

Drill Results (4)

PNDH-201Peñas Negras Project · goldGrade: 1.04Grade Unit: g/tIntercept: 1.5 mView all details

Link to this fact

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

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

Location

Loc. Confidence: high

QA/QC

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

Review

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

Dates

Event date: 2026-08-17T00:00:00.000Z

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

Positive factors

Confirmed mineralization

Negative factors

Apparent width only

Evidence · text

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

PNDH-201Peñas Negras Project · silverGrade: 48Grade Unit: g/tIntercept: 1.5 mView all details

Link to this fact

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

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

Location

Loc. Confidence: high

QA/QC

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

Review

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

Dates

Event date: 2026-08-17T00:00:00.000Z

Reasoning: 48 g/t Ag over 1.5m is a strong silver intercept for this stage.

Positive factors

Strong silver anomaly

Negative factors

Apparent width only

Evidence · text

“48 g/t Ag over 1.5 m from 14.0 m”

PNDH-201Peñas Negras Project · silverGrade: 28.2Grade Unit: g/tIntercept: 1 mView all details

Link to this fact

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

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

Location

Loc. Confidence: high

QA/QC

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

Review

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

Dates

Event date: 2026-08-17T00:00:00.000Z

Reasoning: 28.2 g/t Ag over 1.0m is a notable silver intercept.

Positive factors

Silver anomaly

Negative factors

Apparent width only

Evidence · text

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

PNDH-203Peñas Negras Project · antimonyView all details

Link to this fact

Identity

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

Classification

Program: exploration
Sample Type: drill
Mining Method: unknown

Location

Loc. Confidence: high

QA/QC

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

Review

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

Dates

Event date: 2026-08-17T00:00:00.000Z

Reasoning: Antimony anomaly supports the high-sulfidation epithermal thesis.

Positive factors

Geochemical vector

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.