Altamira Gold Discovers New Mineralized Porphyry Body at Maria Bonita West, Cajueiro Gold District, Brazil
Original announcement by tmx on
- Company
- Altamira Gold Corp.
- Ticker
- ALTA
- Exchange
- TSX
- Region
- Brazil
- Primary commodity
- Gold
- Secondary commodities
- None reported
- Document categories
- Drill results, Other
- Extracted
- 2026-09-13 10:29:51 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Altamira Gold has confirmed a new mineralized porphyry body at Maria Bonita West in the Cajueiro Gold District, Brazil. Drill holes MBA-042 and MBA-043 returned wide, coherent gold intercepts, suggesting the system extends further west and at depth.
Reasoning: The drilling confirmed a new, distinct porphyry body with significant width and continuity, extending the known mineralized system at Maria Bonita.
Positive factors
- Discovery of a new mineralized porphyry body
- Wide coherent mineralized intersections (MBA-042 and MBA-043)
- Mineralization remains open to the west and at depth
- Consistent gold grades observed
Negative factors
- True widths not yet determined
Facts used in scoring: 6
Classification and evidence
Step-Out Extensionpositive
Mineralization extended beyond the previously known limit.
Why it applies: Drilling tested the western extension of the Maria Bonita porphyry system, confirming a new body.
Evidence · text
“tested the western extension of the Maria Bonita gold porphyry system”
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: Release details assay protocols, including 50g fire assay, ICP atomic absorption, and use of blanks, standards, and duplicates.
Evidence · text
“inserting control samples randomly into the submitted batch, comprising field duplicates, independent reference samples and "blank" samples.”
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 have not yet been determined.
Evidence · text
“True widths have not yet been determined.”
Extracted facts
Stored fact records: 6. Some facts used in scoring do not have a stored record.
Drill Results (6)
MBA-040Cajueiro · goldGrade: 0.1Grade Unit: g/tIntercept: 40 mView all detailsHide details
Identity
- Hole ID
- MBA-040
- Project
- Cajueiro
- Commodity
- gold
- Region
- brazil
- Reported Region
- brazil
- Ticker
- ALTA
Geometry
- Grade
- 0.1
- Grade Unit
- g/t
- Intercept
- 40 m
- From
- 184 m
- To
- 224 m
- Intercept Depth
- 184 m
Classification
- Deposit Type
- porphyry
- Program
- exploration
- Sample Type
- drill
- Group ID
- MBA-040:184-224
- Mining Method
- open_pit
Location
- Location
- Maria Bonita West
- Loc. Source
- document
QA/QC
- Laboratory
- SGS Geosol
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
- QA/QC Methods
- standards, blanks, duplicates
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-08-25T00:00:00.000Z
Reasoning: Weakly mineralized intercept in tuff wall rock.
Negative factors
- Low grade intercept
Evidence · table
“0.1”
Context: 40.0
Tags used in scoring
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: qaqc_disclosed is true
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
MBA-041Cajueiro · goldGrade: 0.2Grade Unit: g/tIntercept: 10.6 mView all detailsHide details
Identity
- Hole ID
- MBA-041
- Project
- Cajueiro
- Commodity
- gold
- Region
- brazil
- Reported Region
- brazil
- Ticker
- ALTA
Geometry
- Grade
- 0.2
- Grade Unit
- g/t
- Intercept
- 10.6 m
- From
- 0 m
- To
- 10.6 m
- Intercept Depth
- 0 m
Classification
- Deposit Type
- porphyry
- Program
- exploration
- Sample Type
- drill
- Group ID
- MBA-041:0-10.6
- Mining Method
- open_pit
Location
- Location
- Maria Bonita West
- Loc. Source
- document
QA/QC
- Laboratory
- SGS Geosol
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
- QA/QC Methods
- standards, blanks, duplicates
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-08-25T00:00:00.000Z
Reasoning: Weakly mineralized intercept in tuff wall rock.
Negative factors
- Low grade intercept
Evidence · table
“0.2”
Context: 10.6
Tags used in scoring
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: qaqc_disclosed is true
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
MBA-042Cajueiro · goldGrade: 0.4Grade Unit: g/tIntercept: 36.2 mHistorical resultNeeds review: historical_restatementView all detailsHide details
Identity
- Hole ID
- MBA-042
- Project
- Cajueiro
- Commodity
- gold
- Region
- brazil
- Reported Region
- brazil
- Ticker
- ALTA
Geometry
- Grade
- 0.4
- Grade Unit
- g/t
- Intercept
- 36.2 m
- From
- 0 m
- To
- 36.2 m
- Intercept Depth
- 0 m
Classification
- Deposit Type
- porphyry
- Program
- exploration
- Sample Type
- drill
- Group ID
- MBA-042:0-36.2
- Mining Method
- open_pit
Location
- Location
- Maria Bonita West
- Loc. Source
- document
QA/QC
- Laboratory
- SGS Geosol
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
- QA/QC Methods
- standards, blanks, duplicates
Review
- Needs Review
- Yes
- Review Reason
- historical_restatement
- Interp. Status
- scored
- Historical
- Yes
- Historical Source Date
- 2026-05-12T00:00:00.000Z
Dates
- Event date
- 2026-08-25T00:00:00.000Z
Reasoning: Part of a wide coherent mineralized intersection.
Positive factors
- Intercept from surface
Evidence · text
“36.2m @ 0.4g/t gold from surface”
Tags used in scoring
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: qaqc_disclosed is true
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
MBA-042Cajueiro · goldGrade: 0.3Grade Unit: g/tIntercept: 45.4 mView all detailsHide details
Identity
- Hole ID
- MBA-042
- Project
- Cajueiro
- Commodity
- gold
- Region
- brazil
- Reported Region
- brazil
- Ticker
- ALTA
Geometry
- Grade
- 0.3
- Grade Unit
- g/t
- Intercept
- 45.4 m
- From
- 61.9 m
- To
- 107.3 m
- Intercept Depth
- 61.9 m
Classification
- Deposit Type
- porphyry
- Program
- exploration
- Sample Type
- drill
- Group ID
- MBA-042:61.9-107.3
- Mining Method
- open_pit
Location
- Location
- Maria Bonita West
- Loc. Source
- document
QA/QC
- Laboratory
- SGS Geosol
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
- QA/QC Methods
- standards, blanks, duplicates
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-08-25T00:00:00.000Z
Reasoning: Part of a wide coherent mineralized intersection.
Evidence · text
“45.4m @ 0.3g/t gold from 61.9m depth”
Tags used in scoring
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: qaqc_disclosed is true
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
MBA-042Cajueiro · goldGrade: 0.3Grade Unit: g/tIntercept: 200.4 mView all detailsHide details
Identity
- Hole ID
- MBA-042
- Project
- Cajueiro
- Commodity
- gold
- Region
- brazil
- Reported Region
- brazil
- Ticker
- ALTA
Geometry
- Grade
- 0.3
- Grade Unit
- g/t
- Intercept
- 200.4 m
- From
- 113.2 m
- To
- 313.6 m
- Intercept Depth
- 113.2 m
Classification
- Deposit Type
- porphyry
- Program
- exploration
- Sample Type
- drill
- Group ID
- MBA-042:113.2-313.6
- Mining Method
- open_pit
Location
- Location
- Maria Bonita West
- Loc. Source
- document
QA/QC
- Laboratory
- SGS Geosol
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
- QA/QC Methods
- standards, blanks, duplicates
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-08-25T00:00:00.000Z
Reasoning: One of the widest coherent mineralized intersections encountered to date.
Positive factors
- Very wide intercept
- Continuous mineralization
Evidence · text
“200.4m @ 0.3g/t gold from 113.2m depth”
Tags used in scoring
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: qaqc_disclosed is true
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
MBA-043Cajueiro · goldGrade: 0.4Grade Unit: g/tIntercept: 231.5 mView all detailsHide details
Identity
- Hole ID
- MBA-043
- Project
- Cajueiro
- Commodity
- gold
- Region
- brazil
- Reported Region
- brazil
- Ticker
- ALTA
Geometry
- Grade
- 0.4
- Grade Unit
- g/t
- Intercept
- 231.5 m
- From
- 93 m
- To
- 324.5 m
- Intercept Depth
- 93 m
Classification
- Deposit Type
- porphyry
- Program
- exploration
- Sample Type
- drill
- Group ID
- MBA-043:93-324.5
- Mining Method
- open_pit
Location
- Location
- Maria Bonita West
- Loc. Source
- document
QA/QC
- Laboratory
- SGS Geosol
- QA/QC Disclosed
- Yes
- QP Signed
- Yes
- QA/QC Methods
- standards, blanks, duplicates
Review
- Needs Review
- No
- Interp. Status
- scored
- Historical
- No
Dates
- Event date
- 2026-08-25T00:00:00.000Z
Reasoning: One of the widest coherent mineralized intersections encountered to date.
Positive factors
- Very wide intercept
- Continuous mineralization
Evidence · text
“231.5m @ 0.4g/t gold from 93m depth”
Tags used in scoring
QA/QC Disclosedpositive
Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).
Why it applies: qaqc_disclosed is true
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
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.