Lundin Mining Increases M&I Copper Mineral Resources by 37% and Updates Mineral Reserves
Original announcement by yahoo_press on
- Company
- Lundin Mining Corporation
- Ticker
- LUN
- Exchange
- TSX
- Region
- Unavailable
- Primary commodity
- Copper
- Secondary commodities
- Gold, Silver
- Document categories
- Resource update
- Extracted
- 2026-09-21 08:14:37 UTC
Analysis by Minestarters Atlas
Atlas analysis published:
Minestarters Atlas analysis
Summary
Lundin Mining has reported updated Mineral Resource and Mineral Reserve estimates effective December 31, 2025. The update highlights a 37% increase in Measured and Indicated copper resources, totaling 28,372 kt at 0.35% Cu.
Reasoning: The company reported a 37% increase in M&I copper resources, representing a substantial expansion of the mineral asset base.
Positive factors
- Significant tonnage growth
- Contained metal growth
Facts used in scoring: 3
Classification and evidence
Tonnage Growthpositive
Significant tonnage increase (≥15%) vs prior estimate with grade maintained or improved.
Why it applies: M&I copper resources increased by 37%
Evidence · text
“Increases M&I Copper Mineral Resources by 37%”
Contained Metal Growthpositive
True scale improvement — contained metal ounces/tonnes increased vs prior, accounting for both tonnage and grade changes.
Why it applies: The increase in M&I copper resources implies growth in contained copper metal
Evidence · text
“Increases M&I Copper Mineral Resources by 37%”
Extracted facts
Stored fact records: 3. Some facts used in scoring do not have a stored record.
Resource Estimates (3)
indicatedcopperTonnes: 8193000000Grade: 0.35Grade Unit: %Contained Metal: 28372Contained Unit: ktView all detailsHide details
Identity
- Commodity
- copper
- Ticker
- LUN
Resource scope
- Estimate type
- resource
- Resource group id
- resource:64c731588e03ce422ac7
Resource Data
- Category
- indicated
- Tonnes
- 8193000000
- Grade
- 0.35
- Grade Unit
- %
- Contained Metal
- 28372
- Contained Unit
- kt
Prior Estimate
- Resource Date
- 2025-12-31
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-02-19T00:00:00.000Z
Reasoning: Significant increase in copper resource tonnage and contained metal.
Positive factors
- 37% increase in M&I copper resources
Evidence · text
“estimated Measured and Indicated Mineral Resources of contained copper is 28,372 kilotonnes ("kt"), ... (8,193 million tonnes ("Mt") at 0.35% Cu”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the release
indicatedgoldTonnes: 8193000000Grade: 0.18Grade Unit: g/tContained Metal: 48.2Contained Unit: mozView all detailsHide details
Identity
- Commodity
- gold
- Ticker
- LUN
Resource scope
- Estimate type
- resource
- Resource group id
- resource:64c731588e03ce422ac7
Resource Data
- Category
- indicated
- Tonnes
- 8193000000
- Grade
- 0.18
- Grade Unit
- g/t
- Contained Metal
- 48.2
- Contained Unit
- moz
Prior Estimate
- Resource Date
- 2025-12-31
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-02-19T00:00:00.000Z
Reasoning: Gold is reported as a secondary commodity within the resource estimate.
Evidence · text
“48.2 million ounces ("Moz") gold ... (8,193 million tonnes ("Mt") at ... 0.18 g/t Au”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the release
indicatedsilverTonnes: 8193000000Grade: 3.08Grade Unit: g/tContained Metal: 812Contained Unit: mozView all detailsHide details
Identity
- Commodity
- silver
- Ticker
- LUN
Resource scope
- Estimate type
- resource
- Resource group id
- resource:64c731588e03ce422ac7
Resource Data
- Category
- indicated
- Tonnes
- 8193000000
- Grade
- 3.08
- Grade Unit
- g/t
- Contained Metal
- 812
- Contained Unit
- moz
Prior Estimate
- Resource Date
- 2025-12-31
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-02-19T00:00:00.000Z
Reasoning: Silver is reported as a secondary commodity within the resource estimate.
Evidence · text
“812 Moz silver ... (8,193 million tonnes ("Mt") at ... 3.08 g/t Ag”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
No QP/CP Disclosurenegative
No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience.
Why it applies: no Qualified or Competent Person is named anywhere in the 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.