Orosur Mining Inc Announces Maiden Mineral Resource Estimate at Pepas
Original announcement by tmx on
- Company
- Orosur Mining Inc
- Ticker
- OMI
- Exchange
- TSX
- Region
- Colombia
- Primary commodity
- Gold
- Secondary commodities
- None reported
- Document categories
- Resource update
- Extracted
- 2026-09-18 15:02:42 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Orosur Mining Inc has announced its maiden Mineral Resource Estimate for the Pepas deposit at the Anzá Project in Colombia. The estimate includes 1.14 Mt at 5.46 g/t gold in the Indicated category and 0.19 Mt at 2.99 g/t gold in the Inferred category, based on a 0.92 g/t Au cut-off.
Reasoning: The announcement of a maiden MRE with a strong Indicated grade and high-density drilling provides significant de-risking for the Pepas deposit.
Positive factors
- Maiden Mineral Resource Estimate established
- High Indicated grade of 5.46 g/t Au
- Close-spaced drilling (15-30m) supports classification
- NI 43-101 compliant with QP sign-off
Facts used in scoring: 2
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: First formal MRE for the Pepas deposit.
Evidence · text
“completion of a maiden Mineral Resource estimate ("MRE") for the Pepas deposit”
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: Significant portion of the resource is in the Indicated category.
Evidence · text
“1.14 Mt at 5.46 g/t Au in Indicated classification”
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: The MRE was prepared in accordance with NI 43-101 standards.
Evidence · text
“disclosed to National Instrument 43-101 ("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: Mr. Galen White, a Qualified Person, supervised the estimate.
Evidence · text
“prepared under the supervision of Mr. Galen White... Mr. White is a Qualified Person ("QP")”
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: The reporting cut-off grade of 0.92 g/t Au is clearly stated.
Evidence · text
“reporting cut-off grade of 0.92g/t Au”
Extracted facts
Stored fact records: 2. Some facts used in scoring do not have a stored record.
Resource Estimates (2)
indicatedPepas · goldTonnes: 1140000Grade: 5.46Grade Unit: g/tContained Metal: 201000Contained Unit: ozsView all detailsHide details
Identity
- Project
- Pepas
- Commodity
- gold
- Region
- colombia
- Reported Region
- Colombia
- Ticker
- OMI
Resource scope
- Estimate type
- resource
- Effective date
- 2026-01-16T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Galen White
- Resource group id
- resource:3ee285dec6742a4037dd
- Deposit or zone
- Pepas
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 1140000
- Grade
- 5.46
- Grade Unit
- g/t
- Contained Metal
- 201000
- Contained Unit
- ozs
- Cutoff Grade
- 0.92
- Cutoff Unit
- g/t Au
Prior Estimate
- Resource Date
- 2026-01-16
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-02-10T00:00:00.000Z
Reasoning: High-grade maiden indicated resource.
Positive factors
- Strong grade for Indicated category
- Maiden resource
Evidence · table
“5.46”
Context: 1.14
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
inferredPepas · goldTonnes: 190000Grade: 2.99Grade Unit: g/tContained Metal: 18000Contained Unit: ozsView all detailsHide details
Identity
- Project
- Pepas
- Commodity
- gold
- Region
- colombia
- Reported Region
- Colombia
- Ticker
- OMI
Resource scope
- Estimate type
- resource
- Effective date
- 2026-01-16T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Galen White
- Resource group id
- resource:8acfdd1bd75fcaccd1de
- Deposit or zone
- Pepas
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 190000
- Grade
- 2.99
- Grade Unit
- g/t
- Contained Metal
- 18000
- Contained Unit
- ozs
- Cutoff Grade
- 0.92
- Cutoff Unit
- g/t Au
Prior Estimate
- Resource Date
- 2026-01-16
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-02-10T00:00:00.000Z
Reasoning: Standard maiden inferred component.
Positive factors
- Contributes to total resource scale
Negative factors
- Inferred category carries higher geological risk
Evidence · table
“2.99”
Context: 0.19
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.