Golden Arrow Reports Initial Mineral Resource Estimate for San Pietro Copper-Gold-Iron-Cobalt Project, Chile
Original announcement by tmx on
- Company
- Golden Arrow Resources Corporation
- Ticker
- GRG
- Exchange
- TSX
- Region
- Chile
- Primary commodity
- Copper
- Secondary commodities
- Gold, Iron ore, Cobalt
- Document categories
- Resource update
- Extracted
- 2026-09-16 03:24:10 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Golden Arrow Resources announced its maiden Mineral Resource Estimate for the San Pietro Copper-Gold-Iron-Cobalt Project in Chile, reporting 492 million tonnes at an average grade of 0.23% Cu, 0.05 g/t Au, 14.43% Fe, and 99 ppm Co in the Inferred category. This initial pit-constrained estimate includes 2.5 billion pounds of copper and 770,000 ounces of gold, establishing a significant resource base for the project. The company plans further drilling to upgrade resource categories and undertake project-specific metallurgical testwork.
Reasoning: Golden Arrow announced its initial pit-constrained Inferred Mineral Resource Estimate for the San Pietro project, totaling 492 Mt at 0.23% Cu, 0.05 g/t Au, 14.43% Fe, and 99 ppm Co, which establishes a significant baseline but is entirely in the lowest confidence category.
Positive factors
- Maiden Resource
- Large Tonnage
- Pit-Constrained
- Multi-Commodity
- NI 43-101 Compliant
- QP-Signed
Negative factors
- 100% Inferred Category
- Relatively Low Grades for Copper and Gold
- Metallurgical Recoveries Assumed
Low confidence — this extraction should be reviewed alongside the original source.
Facts used in scoring: 4
Classification and evidence
Maiden Resourceneutral
First formal MRE for the project — establishes baseline but typically exploration-stage with high Inferred component. No prior estimate exists, so every change band is not applicable.
Why it applies: This is the first mineral resource estimate announced for the San Pietro project.
Evidence · text
“first mineral resource estimate ("MRE") for the San Pietro Copper-Gold-Iron-Cobalt Project”
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: The entire resource estimate is classified in the Inferred category.
Evidence · text
“492 million tonnes at an average grade of 0.23% Cu, 0.05 g/t Au, 14.43% Fe & 99 ppm Co in the Inferred category”
All Inferrednegative
M&I share below the weak bound — very early stage, no engineering confidence.
Why it applies: The resource estimate reports 100% of its tonnage in the Inferred category, indicating an early stage of confidence.
Evidence · text
“492 million tonnes at an average grade of 0.23% Cu, 0.05 g/t Au, 14.43% Fe & 99 ppm Co in the Inferred category”
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: The mineral resource estimate is prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects.
Evidence · text
“independent technical report prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101")”
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: The Mineral Resource Estimate was prepared under the direction of Susan Lomas, P.Geo., and Bruce Davis Ph.D., F.AusIMM, both independent Qualified Persons.
Evidence · text
“The Mineral Resource Estimate and technical data in this news release were prepared under the direction of Susan Lomas , P.Geo., of Lions Gate Geological Consulting Inc. and Bruce Davis Ph.D., F.AusIMM, Consultant. Both Ms. Lomas and Dr. Davis are independent Qualified Persons as defined in NI 43-101.”
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: The resource is reported using a 0.30% CuEq cutoff grade.
Evidence · table
“0.30”
Context: 492
Extracted facts
Stored fact records: 4. Some facts used in scoring do not have a stored record.
Resource Estimates (4)
inferredSan Pietro · copperTonnes: 492000000Grade: 0.23Grade Unit: %Contained Metal: 2470Contained Unit: mlbView all detailsHide details
Identity
- Project
- San Pietro
- Commodity
- copper
- Region
- chile
- Reported Region
- Chile
- Ticker
- GRG
Resource scope
- Estimate type
- resource
- Effective date
- 2025-01-24T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Susan Lomas, Bruce Davis
- Resource group id
- resource:3e253fa0f1c590654d1e
- Deposit or zone
- Rincones and Colla Deposits
Resource Data
- Category
- inferred
- Tonnes
- 492000000
- Grade
- 0.23
- Grade Unit
- %
- Contained Metal
- 2470
- Contained Unit
- mlb
- Cutoff Grade
- 0.3
- Cutoff Unit
- % CuEq
Prior Estimate
- Resource Date
- 2025-01-24
Metal Equivalent
- Metal Eq. Grade
- 0.41
- Metal Eq. Unit
- % CuEq
- Assumptions Disclosed
- Yes
Location
- Loc. Confidence
- inferred
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-02-28T00:00:00.000Z
Reasoning: Initial Inferred resource of 492 Mt at 0.23% Cu establishes a significant copper base, but the grade is low for an IOCG deposit and the confidence is limited by the Inferred category.
Positive factors
- Maiden Resource
- Large Tonnage
- Pit-Constrained
- NI 43-101 Compliant
- QP-Signed
Negative factors
- 100% Inferred Category
- Relatively Low Grade
- Metallurgical Recoveries Assumed
Evidence · table
“0.23”
Context: 492
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
inferredSan Pietro · goldTonnes: 492000000Grade: 0.05Grade Unit: g/tContained Metal: 770000Contained Unit: ozView all detailsHide details
Identity
- Project
- San Pietro
- Commodity
- gold
- Region
- chile
- Reported Region
- Chile
- Ticker
- GRG
Resource scope
- Estimate type
- resource
- Effective date
- 2025-01-24T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Susan Lomas, Bruce Davis
- Resource group id
- resource:3e253fa0f1c590654d1e
- Deposit or zone
- Rincones and Colla Deposits
Resource Data
- Category
- inferred
- Tonnes
- 492000000
- Grade
- 0.05
- Grade Unit
- g/t
- Contained Metal
- 770000
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- % CuEq
Prior Estimate
- Resource Date
- 2025-01-24
Metal Equivalent
- Metal Eq. Grade
- 0.41
- Metal Eq. Unit
- % CuEq
- Assumptions Disclosed
- Yes
Location
- Loc. Confidence
- inferred
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-02-28T00:00:00.000Z
Reasoning: Initial Inferred resource of 492 Mt at 0.05 g/t Au provides a gold credit, but the grade is very low and the confidence is limited by the Inferred category.
Positive factors
- Maiden Resource
- Large Tonnage
- Pit-Constrained
- NI 43-101 Compliant
- QP-Signed
Negative factors
- 100% Inferred Category
- Very Low Grade
- Metallurgical Recoveries Assumed
Evidence · table
“0.05”
Context: 492
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
inferredSan Pietro · cobaltTonnes: 492000000Grade: 99Grade Unit: ppmContained Metal: 107Contained Unit: mlbView all detailsHide details
Identity
- Project
- San Pietro
- Commodity
- cobalt
- Region
- chile
- Reported Region
- Chile
- Ticker
- GRG
Resource scope
- Estimate type
- resource
- Effective date
- 2025-01-24T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Susan Lomas, Bruce Davis
- Resource group id
- resource:3e253fa0f1c590654d1e
- Deposit or zone
- Rincones and Colla Deposits
Resource Data
- Category
- inferred
- Tonnes
- 492000000
- Grade
- 99
- Grade Unit
- ppm
- Contained Metal
- 107
- Contained Unit
- mlb
- Cutoff Grade
- 0.3
- Cutoff Unit
- % CuEq
Prior Estimate
- Resource Date
- 2025-01-24
Metal Equivalent
- Metal Eq. Grade
- 0.41
- Metal Eq. Unit
- % CuEq
- Assumptions Disclosed
- Yes
Location
- Loc. Confidence
- inferred
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-02-28T00:00:00.000Z
Reasoning: Initial Inferred resource of 492 Mt at 99 ppm Co provides a cobalt credit, adding to the polymetallic nature of the deposit, but the confidence is limited by the Inferred category.
Positive factors
- Maiden Resource
- Large Tonnage
- Pit-Constrained
- NI 43-101 Compliant
- QP-Signed
Negative factors
- 100% Inferred Category
- Metallurgical Recoveries Assumed
Evidence · table
“99”
Context: 492
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
inferredSan Pietro · iron_oreTonnes: 492000000Grade: 14.43Grade Unit: %Contained Metal: 157Contained Unit: blbView all detailsHide details
Identity
- Project
- San Pietro
- Commodity
- iron_ore
- Region
- chile
- Reported Region
- Chile
- Ticker
- GRG
Resource scope
- Estimate type
- resource
- Effective date
- 2025-01-24T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Susan Lomas, Bruce Davis
- Resource group id
- resource:3e253fa0f1c590654d1e
- Deposit or zone
- Rincones and Colla Deposits
Resource Data
- Category
- inferred
- Tonnes
- 492000000
- Grade
- 14.43
- Grade Unit
- %
- Contained Metal
- 157
- Contained Unit
- blb
- Cutoff Grade
- 0.3
- Cutoff Unit
- % CuEq
Prior Estimate
- Resource Date
- 2025-01-24
Metal Equivalent
- Metal Eq. Grade
- 0.41
- Metal Eq. Unit
- % CuEq
- Assumptions Disclosed
- Yes
Location
- Loc. Confidence
- inferred
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-02-28T00:00:00.000Z
Reasoning: Initial Inferred resource of 492 Mt at 14.43% Fe provides a substantial iron component, which is a positive for an IOCG deposit, but the confidence is limited by the Inferred category.
Positive factors
- Maiden Resource
- Large Tonnage
- Pit-Constrained
- NI 43-101 Compliant
- QP-Signed
- Moderate Grade
Negative factors
- 100% Inferred Category
- Metallurgical Recoveries Assumed
Evidence · table
“14.43”
Context: 492
Tags used in scoring
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: category is "inferred"
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: cutoff_grade is stated
QP/CP Signedpositive
Qualified Person (QP) or Competent Person (CP) named and signed off — a member of a recognized professional association (e.g., AusIMM, SME, AIG, P.Geo) with relevant experience.
Why it applies: qp_signed is true
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: reporting_standards includes ni_43_101
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.