Selkirk Copper Expands Minto Resource Ahead of Mid-2026 Economic Study
Original announcement by cruxinvestor on
- Company
- Selkirk Copper Mines
- Ticker
- SCMI
- Exchange
- Unavailable
- Region
- central Yukon, Canada
- Primary commodity
- Copper
- Secondary commodities
- Gold, Silver
- Document categories
- Resource update
- Extracted
- 2026-08-20 18:31:56 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Selkirk Copper has released an updated Minto mineral resource estimate, significantly increasing M&I copper metal by 182% and total tonnage by 280% compared to the 2025 estimate. The updated resource of 47.8 Mt at 0.89% Cu, 0.34 g/t Au, and 3.2 g/t Ag will support a preliminary economic assessment due in mid-2026.
Reasoning: The update shows massive scale expansion in copper and tonnage, driven by both drilling and improved economic assumptions, despite a grade dilution.
Positive factors
- Significant tonnage growth (280%)
- Substantial copper metal growth (182%)
- Expansion of existing lenses and definition of new ones
- Supports upcoming PEA
Negative factors
- Average grade decline (1.20% to 0.89% Cu)
Facts used in scoring: 6
Classification and evidence
Tonnage Growthpositive
Significant tonnage increase (≥15%) vs prior estimate with grade maintained or improved.
Why it applies: Total M&I tonnage rose 280% vs the 2025 estimate.
Evidence · text
“total M&I tonnage rose 280%”
Grade Declinenegative
Average grade dropped >5% vs prior estimate — deposit economics worsening. May indicate high-grading in early drilling.
Why it applies: Average copper grade fell from 1.20% to 0.89%.
Evidence · text
“the average grade fell from 1.20% copper to 0.89% copper”
Contained Metal Growthpositive
True scale improvement — contained metal ounces/tonnes increased vs prior, accounting for both tonnage and grade changes.
Why it applies: M&I copper rose 182% over the 2025 estimate.
Evidence · text
“M&I copper rose 182% over the 2025 estimate”
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
Why it applies: The estimate feeds a preliminary economic assessment (PEA) targeted for mid-2026.
Evidence · text
“The estimate feeds a preliminary economic assessment (PEA) targeted for mid-2026”
Extracted facts
Stored fact records: 6. Some facts used in scoring do not have a stored record.
Resource Estimates (6)
indicatedcopperTonnes: 47800000Grade: 0.89Grade Unit: %Contained Metal: 940000000Contained Unit: poundsView all detailsHide details
Identity
- Commodity
- copper
- Ticker
- SCMI
Resource Data
- Category
- indicated
- Tonnes
- 47800000
- Grade
- 0.89
- Grade Unit
- %
- Contained Metal
- 940000000
- Contained Unit
- pounds
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-07T00:00:00.000Z
Reasoning: Significant metal and tonnage growth despite grade dilution.
Positive factors
- 182% increase in copper metal vs 2025
Negative factors
- Grade decline from 1.20% to 0.89%
Evidence · text
“M&I resources reached 47.8 million tonnes containing 940 million pounds of copper, 530,000 ounces of gold, and 4.97 million ounces of silver.”
indicatedgoldTonnes: 47800000Grade: 0.34Grade Unit: g/tContained Metal: 530000Contained Unit: ouncesView all detailsHide details
Identity
- Commodity
- gold
- Ticker
- SCMI
Resource Data
- Category
- indicated
- Tonnes
- 47800000
- Grade
- 0.34
- Grade Unit
- g/t
- Contained Metal
- 530000
- Contained Unit
- ounces
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-07T00:00:00.000Z
Reasoning: Part of the expanded M&I resource package.
Evidence · text
“47.8 million tonnes of M&I resources grading 0.89% copper, 0.34 grams per tonne (g/t) gold, and 3.2 g/t silver.”
indicatedsilverTonnes: 47800000Grade: 3.2Grade Unit: g/tContained Metal: 4970000Contained Unit: ouncesView all detailsHide details
Identity
- Commodity
- silver
- Ticker
- SCMI
Resource Data
- Category
- indicated
- Tonnes
- 47800000
- Grade
- 3.2
- Grade Unit
- g/t
- Contained Metal
- 4970000
- Contained Unit
- ounces
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-07T00:00:00.000Z
Reasoning: Part of the expanded M&I resource package.
Evidence · text
“47.8 million tonnes of M&I resources grading 0.89% copper, 0.34 grams per tonne (g/t) gold, and 3.2 g/t silver.”
inferredcopperTonnes: 16900000Grade: 0.76Grade Unit: %Contained Metal: 281000000Contained Unit: poundsView all detailsHide details
Identity
- Commodity
- copper
- Ticker
- SCMI
Resource Data
- Category
- inferred
- Tonnes
- 16900000
- Grade
- 0.76
- Grade Unit
- %
- Contained Metal
- 281000000
- Contained Unit
- pounds
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-07T00:00:00.000Z
Reasoning: Significant inferred resource providing exploration upside.
Evidence · text
“Minto holds 16.9 million tonnes of inferred resources grading 0.76% copper, containing 281 million pounds of copper, 142,000 ounces of gold, and 1.5 million ounces of silver.”
inferredgoldTonnes: 16900000Contained Metal: 142000Contained Unit: ouncesView all detailsHide details
Identity
- Commodity
- gold
- Ticker
- SCMI
Resource Data
- Category
- inferred
- Tonnes
- 16900000
- Contained Metal
- 142000
- Contained Unit
- ounces
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-07T00:00:00.000Z
Reasoning: Part of the inferred resource package.
Evidence · text
“16.9 million tonnes of inferred resources grading 0.76% copper, containing 281 million pounds of copper, 142,000 ounces of gold, and 1.5 million ounces of silver.”
inferredsilverTonnes: 16900000Contained Metal: 1500000Contained Unit: ouncesView all detailsHide details
Identity
- Commodity
- silver
- Ticker
- SCMI
Resource Data
- Category
- inferred
- Tonnes
- 16900000
- Contained Metal
- 1500000
- Contained Unit
- ounces
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-07T00:00:00.000Z
Reasoning: Part of the inferred resource package.
Evidence · text
“16.9 million tonnes of inferred resources grading 0.76% copper, containing 281 million pounds of copper, 142,000 ounces of gold, and 1.5 million ounces of silver.”
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.