Amarillo Gold Provides New Resource Model, increases Measured Resource by 53% @ 2.00 g/t Au Mara Rosa Project, Brazil
Original announcement by tmx on
- Company
- Amarillo Gold Corp.
- Ticker
- AGC
- Exchange
- TSX
- Region
- Goias, Brazil
- Primary commodity
- Gold
- Secondary commodities
- None reported
- Document categories
- Resource update
- Extracted
- 2026-09-13 11:35:24 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Amarillo Gold has announced a new resource model for the Posse deposit at the Mara Rosa Project in Brazil. The update shows a 53% increase in Measured gold resources and an 84% increase in Inferred resources compared to the 2011 estimate.
Reasoning: Significant growth in Measured and Inferred categories driven by new drilling and improved modeling, increasing project scale and confidence.
Positive factors
- Measured resource increased by 53%
- Inferred resource increased 84%
- Improved geological confidence with higher M&I proportion
- Deposit remains open to depth and along strike
- QP sign-off provided
Facts used in scoring: 6
Classification and evidence
Category Upgradepositive
Resource confidence improved — Inferred upgraded to Indicated, or Indicated to Measured. De-risking signal.
Why it applies: The proportion of M+I category that moved to Measured increased confidence.
Evidence · text
“The proportion of the (M+I) category which has moved to a Measured resource increases confidence in the model.”
Tonnage Growthpositive
Tonnage increase reaching the strong tier vs prior estimate, with grade maintained or improved.
Why it applies: Inferred resource tonnage increased by 84% over the 2011 estimate.
Evidence · text
“Inferred resource has increased 84% over the 2011 estimate.”
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: Keith Whitehouse of AusIMM is named as the independent QP.
Evidence · text
“Keith Whitehouse is the independent Qualified Person (QP) for this resource statement”
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: The 0.5 g/t cutoff is explicitly stated for the new estimate.
Evidence · text
“calculated the new resource estimate at a 0.5 g/t cutoff”
Extracted facts
Stored fact records: 6. Some facts used in scoring do not have a stored record.
Resource Estimates (6)
measuredMara Rosa Project · goldTonnes: 8568000Grade: 2Grade Unit: g/tContained Metal: 551100Contained Unit: ozView all detailsHide details
Identity
- Project
- Mara Rosa Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Goias, Brazil
- Ticker
- AGC
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Keith Whitehouse
- Resource group id
- resource:71e1c581fbae885f9af9
- Deposit or zone
- Posse
- Mining method
- combined
Resource Data
- Category
- measured
- Tonnes
- 8568000
- Grade
- 2
- Grade Unit
- g/t
- Contained Metal
- 551100
- Contained Unit
- oz
- Cutoff Grade
- 0.5
- Cutoff Unit
- g/t
Prior Estimate
- Resource Date
- 2016-07-21
Lab
- Laboratory
- Australian Exploration Field Services Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2016-07-21T00:00:00.000Z
Reasoning: Strong growth in high-confidence category.
Positive factors
- 53% increase in measured category
Evidence · table
“2.00”
Context: 8,568,000
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
PFS-Supportingneutral
Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component.
Why it applies: the release names the study this estimate supports
DFS-Supportingneutral
Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence.
Why it applies: the release names the study this estimate supports
indicatedMara Rosa Project · goldTonnes: 13458000Grade: 1.52Grade Unit: g/tContained Metal: 659000Contained Unit: ozView all detailsHide details
Identity
- Project
- Mara Rosa Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Goias, Brazil
- Ticker
- AGC
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Keith Whitehouse
- Resource group id
- resource:0d0671a3c3e707a37964
- Deposit or zone
- Posse
- Mining method
- combined
Resource Data
- Category
- indicated
- Tonnes
- 13458000
- Grade
- 1.52
- Grade Unit
- g/t
- Contained Metal
- 659000
- Contained Unit
- oz
- Cutoff Grade
- 0.5
- Cutoff Unit
- g/t
Prior Estimate
- Resource Date
- 2016-07-21
Lab
- Laboratory
- Australian Exploration Field Services Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2016-07-21T00:00:00.000Z
Reasoning: Standard indicated resource component.
Evidence · table
“1.52”
Context: 13,458,000
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
PFS-Supportingneutral
Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component.
Why it applies: the release names the study this estimate supports
DFS-Supportingneutral
Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence.
Why it applies: the release names the study this estimate supports
inferredMara Rosa Project · goldTonnes: 7119000Grade: 1.26Grade Unit: g/tContained Metal: 287700Contained Unit: ozView all detailsHide details
Identity
- Project
- Mara Rosa Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Goias, Brazil
- Ticker
- AGC
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Keith Whitehouse
- Resource group id
- resource:ea2945d22945573ba10f
- Deposit or zone
- Posse
- Mining method
- combined
Resource Data
- Category
- inferred
- Tonnes
- 7119000
- Grade
- 1.26
- Grade Unit
- g/t
- Contained Metal
- 287700
- Contained Unit
- oz
- Cutoff Grade
- 0.5
- Cutoff Unit
- g/t
Prior Estimate
- Resource Date
- 2016-07-21
Lab
- Laboratory
- Australian Exploration Field Services Ltd
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2016-07-21T00:00:00.000Z
Reasoning: Significant expansion of the resource footprint.
Positive factors
- 84% increase in inferred category
Evidence · table
“1.26”
Context: 7,119,000
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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
PFS-Supportingneutral
Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component.
Why it applies: the release names the study this estimate supports
DFS-Supportingneutral
Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence.
Why it applies: the release names the study this estimate supports
measuredMara Rosa Project · goldTonnes: 5463000Grade: 2.04Grade Unit: g/tContained Metal: 358300Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Mara Rosa Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Goias, Brazil
- Ticker
- AGC
Resource scope
- Estimate type
- resource
- QP Signed
- No
- Resource group id
- resource:81e7faf14e7929d7ed84
- Deposit or zone
- Posse
Resource Data
- Category
- measured
- Tonnes
- 5463000
- Grade
- 2.04
- Grade Unit
- g/t
- Contained Metal
- 358300
- Contained Unit
- oz
- Cutoff Grade
- 0.5
- Cutoff Unit
- g/t
Prior Estimate
- Resource Date
- 2011-09-01
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
- Historical Source Date
- 2011-09-01T00:00:00.000Z
Dates
- Event date
- 2016-07-21T00:00:00.000Z
Reasoning: Historical baseline for comparison.
Evidence · table
“2.04”
Context: 5,463,000
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
PFS-Supportingneutral
Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component.
Why it applies: the release names the study this estimate supports
DFS-Supportingneutral
Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence.
Why it applies: the release names the study this estimate supports
Stale Estimatenegative
Effective date is >2 years old — data currency concern, may not reflect current geological understanding.
Why it applies: effective date is 4.9 years before this release
indicatedMara Rosa Project · goldTonnes: 15393000Grade: 1.65Grade Unit: g/tContained Metal: 816600Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Mara Rosa Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Goias, Brazil
- Ticker
- AGC
Resource scope
- Estimate type
- resource
- QP Signed
- No
- Resource group id
- resource:a2cfd0e620f0c24406da
- Deposit or zone
- Posse
Resource Data
- Category
- indicated
- Tonnes
- 15393000
- Grade
- 1.65
- Grade Unit
- g/t
- Contained Metal
- 816600
- Contained Unit
- oz
- Cutoff Grade
- 0.5
- Cutoff Unit
- g/t
Prior Estimate
- Resource Date
- 2011-09-01
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
- Historical Source Date
- 2011-09-01T00:00:00.000Z
Dates
- Event date
- 2016-07-21T00:00:00.000Z
Reasoning: Historical baseline for comparison.
Evidence · table
“1.65”
Context: 15,393,000
Tags used in scoring
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: category is "indicated"
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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
PFS-Supportingneutral
Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component.
Why it applies: the release names the study this estimate supports
DFS-Supportingneutral
Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence.
Why it applies: the release names the study this estimate supports
Stale Estimatenegative
Effective date is >2 years old — data currency concern, may not reflect current geological understanding.
Why it applies: effective date is 4.9 years before this release
inferredMara Rosa Project · goldTonnes: 3630000Grade: 1.34Grade Unit: g/tContained Metal: 156400Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Mara Rosa Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Goias, Brazil
- Ticker
- AGC
Resource scope
- Estimate type
- resource
- QP Signed
- No
- Resource group id
- resource:3ea723773f9e6b6e2fe4
- Deposit or zone
- Posse
Resource Data
- Category
- inferred
- Tonnes
- 3630000
- Grade
- 1.34
- Grade Unit
- g/t
- Contained Metal
- 156400
- Contained Unit
- oz
- Cutoff Grade
- 0.5
- Cutoff Unit
- g/t
Prior Estimate
- Resource Date
- 2011-09-01
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
- Historical Source Date
- 2011-09-01T00:00:00.000Z
Dates
- Event date
- 2016-07-21T00:00:00.000Z
Reasoning: Historical baseline for comparison.
Evidence · table
“1.34”
Context: 3,630,000
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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
PFS-Supportingneutral
Resource estimate prepared to support a Pre-Feasibility Study — requires adequate M&I component.
Why it applies: the release names the study this estimate supports
DFS-Supportingneutral
Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence.
Why it applies: the release names the study this estimate supports
Stale Estimatenegative
Effective date is >2 years old — data currency concern, may not reflect current geological understanding.
Why it applies: effective date is 4.9 years before this release
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.