Altamira Gold Announces Maiden Mineral Resource Estimate for Maria Bonita Porphyry Gold Project, Cajueiro District, Brazil
Original announcement by tmx on
- Company
- Altamira Gold Corp.
- Ticker
- ALTA
- Exchange
- TSX
- Region
- Mato Grosso, Brazil
- Primary commodity
- Gold
- Secondary commodities
- None reported
- Document categories
- Resource update, Drill results
- Extracted
- 2026-09-13 12:02:19 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Altamira Gold Corp. has announced a maiden mineral resource estimate for the Maria Bonita porphyry gold project in Brazil. The resource includes 24.19Mt of Indicated and 25.64Mt of Inferred resources at 0.46 g/t and 0.44 g/t gold respectively, based on a 0.2 g/t Au cut-off.
Reasoning: The announcement of a maiden mineral resource for a new porphyry target (Maria Bonita) that doubles the company's resource base is a highly material and novel development.
Positive factors
- Maiden resource establishes a new significant asset
- High-grade near-surface saprolite component identified
- Deposit remains open to the west, south and at depth
- Significant district-scale potential with 8 additional targets
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: The announcement is for the first formal mineral resource estimate for the Maria Bonita deposit.
Evidence · text
“maiden mineral resource estimate for the Maria Bonita porphyry gold deposit”
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: The resource estimate was prepared in accordance with NI 43-101 standards and supervised by a QP.
Evidence · text
“All Inferred Resources and Indicated Resources are defined in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum Definition Standards for Mineral Resources and Mineral Reserves (2014) (the "CIM Standards").”
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: Volodymyr Myadzel, PhD, MAIG is named as the Qualified Person supervising the preparation.
Evidence · text
“Qualified Person Volodymyr Myadzel, PhD, MAIG, a consultant to the Company as well as a Qualified Person as defined by National Instrument 43-101, supervised the preparation”
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: The cut-off grade of 0.2 g/t gold is explicitly stated for the resource estimation.
Evidence · text
“These resources were calculated using a 0.2 g/t gold cut-off grade.”
Extracted facts
Stored fact records: 4. Some facts used in scoring do not have a stored record.
Resource Estimates (4)
indicatedCajueiro Project · goldTonnes: 24190000Grade: 0.46Grade Unit: g/tContained Metal: 357800Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Cajueiro Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Mato Grosso, Brazil
- Ticker
- ALTA
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Volodymyr Myadzel
- Resource group id
- resource:228ebdd60076bf0496d9
- Deposit or zone
- Maria Bonita
- Mining method
- open_pit
- Material type
- fresh
Resource Data
- Category
- indicated
- Tonnes
- 24190000
- Grade
- 0.46
- Grade Unit
- g/t
- Contained Metal
- 357800
- Contained Unit
- oz
- Cutoff Grade
- 0.2
- Cutoff Unit
- g/t Au
Lab
- Laboratory
- SGS
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
Dates
- Event date
- 2025-05-05T00:00:00.000Z
Reasoning: Indicated resource for a new maiden porphyry target.
Positive factors
- Maiden resource
Evidence · text
“total Indicated Resources of 24.19Mt @ 0.46g/t gold (for a total of 357,800oz)”
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
inferredCajueiro Project · goldTonnes: 25640000Grade: 0.44Grade Unit: g/tContained Metal: 362400Contained Unit: ozHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Project
- Cajueiro Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Mato Grosso, Brazil
- Ticker
- ALTA
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Volodymyr Myadzel
- Resource group id
- resource:a8dd28ed839dfdfe6166
- Deposit or zone
- Maria Bonita
- Mining method
- open_pit
- Material type
- fresh
Resource Data
- Category
- inferred
- Tonnes
- 25640000
- Grade
- 0.44
- Grade Unit
- g/t
- Contained Metal
- 362400
- Contained Unit
- oz
- Cutoff Grade
- 0.2
- Cutoff Unit
- g/t Au
Lab
- Laboratory
- SGS
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Historical
- Yes
Dates
- Event date
- 2025-05-05T00:00:00.000Z
Reasoning: Inferred resource for a new maiden porphyry target.
Positive factors
- Maiden resource
Negative factors
- Inferred category
Evidence · text
“Total Inferred Resources of 25.64Mt @ 0.44g/t gold (for a total of 362,400oz)”
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
indicatedCajueiro Project · goldTonnes: 2020000Grade: 0.59Grade Unit: g/tContained Metal: 38000Contained Unit: ozView all detailsHide details
Identity
- Project
- Cajueiro Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Mato Grosso, Brazil
- Ticker
- ALTA
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Volodymyr Myadzel
- Resource group id
- resource:218ef09e563ac07c1387
- Deposit or zone
- Maria Bonita saprolite
- Mining method
- open_pit
- Material type
- saprolite
Resource Data
- Category
- indicated
- Tonnes
- 2020000
- Grade
- 0.59
- Grade Unit
- g/t
- Contained Metal
- 38000
- Contained Unit
- oz
- Cutoff Grade
- 0.2
- Cutoff Unit
- g/t Au
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-05-05T00:00:00.000Z
Reasoning: Indicated saprolite resource component.
Positive factors
- Higher grade near-surface saprolite
Evidence · text
“near-surface saprolite Indicated Resources of 2,02Mt @ 0.59g/t gold (for a total of 38,000oz)”
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
inferredCajueiro Project · goldTonnes: 680000Grade: 0.4Grade Unit: g/tContained Metal: 8700Contained Unit: ozView all detailsHide details
Identity
- Project
- Cajueiro Project
- Commodity
- gold
- Region
- brazil
- Reported Region
- Mato Grosso, Brazil
- Ticker
- ALTA
Resource scope
- Estimate type
- resource
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Volodymyr Myadzel
- Resource group id
- resource:665b8b354bf87a800a26
- Deposit or zone
- Maria Bonita saprolite
- Mining method
- open_pit
- Material type
- saprolite
Resource Data
- Category
- inferred
- Tonnes
- 680000
- Grade
- 0.4
- Grade Unit
- g/t
- Contained Metal
- 8700
- Contained Unit
- oz
- Cutoff Grade
- 0.2
- Cutoff Unit
- g/t Au
Lab
- Laboratory
- SGS
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2025-05-05T00:00:00.000Z
Reasoning: Inferred saprolite resource component.
Negative factors
- Inferred category
Evidence · text
“Inferred Resources of 0.68t @ 0.40g/t gold (for a total of 8,700oz)”
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.