McEwen Files NI 43-101 Technical Reports: Grey Fox Prefeasibility Study in Ontario and Lookout Mountain and Windfall Mineral Resource Estimate in Nevada
Original announcement by tmx on
- Company
- McEwen Inc.
- Ticker
- MUX
- Exchange
- TSX
- Region
- Nevada
- Primary commodity
- Gold
- Secondary commodities
- Silver, Copper
- Document categories
- Resource update, Other
- Extracted
- 2026-09-12 14:35:27 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
McEwen Inc. has filed NI 43-101 technical reports for the Grey Fox Project in Ontario and the Lookout Mountain and Windfall deposits in Nevada. The filings support previously announced results, including Probable Reserves at Grey Fox and significant gold mineral resources in Nevada.
Reasoning: The filing of NI 43-101 technical reports formalizes previously announced PFS and MRE results for multiple key projects.
Positive factors
- Probable Reserves at Grey Fox
- Significant gold resources in Nevada
- Oxide mineralization amenable to heap leach
Negative factors
- Low novelty as reports support previously announced results
Facts used in scoring: 7
Classification and evidence
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: The document reports on technical reports supporting previously announced mineral resource estimates.
Evidence · text
“The report supports the Mineral Resource estimates previously announced”
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: Multiple Qualified Persons are named for both the Grey Fox and Lookout Mountain/Windfall reports.
Evidence · text
“The Grey Fox Report was prepared by the following Qualified Persons”
Extracted facts
Stored fact records: 7. Some facts used in scoring do not have a stored record.
Resource Estimates (7)
probableGrey Fox · goldTonnes: 9410000Grade: 3.24Grade Unit: g/tContained Metal: 980300Contained Unit: ozView all detailsHide details
Identity
- Project
- Grey Fox
- Commodity
- gold
- Region
- canada_on
- Reported Region
- Ontario
- Ticker
- MUX
Resource scope
- Estimate type
- reserve
- Resource group id
- resource:b6a3c19c311172b20340
Resource Data
- Category
- probable
- Tonnes
- 9410000
- Grade
- 3.24
- Grade Unit
- g/t
- Contained Metal
- 980300
- Contained Unit
- oz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-22T00:00:00.000Z
Reasoning: Probable reserves at Grey Fox with 3.24 g/t Au.
Positive factors
- Strong grade and tonnage for reserves
Negative factors
- Supports previously announced results
Evidence · text
“Probable Mineral Reserves of 9.41 million tonnes grading 3.24 g/t Au and containing 980,300 gold ounces”
Tags used in scoring
Probable Reservepositive
Indicated Resource with demonstrated economic viability after applying modifying factors.
Why it applies: category is "probable"
Cut-off Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
indicatedGrey Fox · goldTonnes: 9680000Grade: 2.25Grade Unit: g/tContained Metal: 701000Contained Unit: ozView all detailsHide details
Identity
- Project
- Grey Fox
- Commodity
- gold
- Region
- canada_on
- Reported Region
- Ontario
- Ticker
- MUX
Resource scope
- Estimate type
- resource
- Resource group id
- resource:bc35bbeeea58b56394e4
Resource Data
- Category
- indicated
- Tonnes
- 9680000
- Grade
- 2.25
- Grade Unit
- g/t
- Contained Metal
- 701000
- Contained Unit
- oz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-22T00:00:00.000Z
Reasoning: Indicated resource at Grey Fox.
Positive factors
- Significant indicated resource
Negative factors
- Supports previously announced results
Evidence · text
“9.68 million tonnes at 2.25 g/t Au for 701,000 gold ounces Indicated”
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
inferredGrey Fox · goldTonnes: 4700000Grade: 2.57Grade Unit: g/tContained Metal: 388000Contained Unit: ozView all detailsHide details
Identity
- Project
- Grey Fox
- Commodity
- gold
- Region
- canada_on
- Reported Region
- Ontario
- Ticker
- MUX
Resource scope
- Estimate type
- resource
- Resource group id
- resource:bb4d88529f0f25248059
Resource Data
- Category
- inferred
- Tonnes
- 4700000
- Grade
- 2.57
- Grade Unit
- g/t
- Contained Metal
- 388000
- Contained Unit
- oz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-22T00:00:00.000Z
Reasoning: Inferred resource at Grey Fox.
Positive factors
- Good grade for inferred resource
Negative factors
- Supports previously announced results
Evidence · text
“4.70 million tonnes at 2.57 g/t Au for 388,000 gold ounces Inferred”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
indicatedLookout Mountain · goldTonnes: 19570000Grade: 0.64Grade Unit: g/tContained Metal: 402300Contained Unit: ozView all detailsHide details
Identity
- Project
- Lookout Mountain
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- MUX
Resource scope
- Estimate type
- resource
- Resource group id
- resource:1648a9cef5e7b8141a9e
Resource Data
- Category
- indicated
- Tonnes
- 19570000
- Grade
- 0.64
- Grade Unit
- g/t
- Contained Metal
- 402300
- Contained Unit
- oz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-22T00:00:00.000Z
Reasoning: Indicated resource at Lookout Mountain.
Positive factors
- Large indicated resource
Negative factors
- Supports previously announced results
Evidence · text
“Indicated Mineral Resources of 19.57 million tonnes at 0.64 g/t Au, containing 402,300 gold ounces”
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
inferredLookout Mountain · goldTonnes: 7290000Grade: 0.57Grade Unit: g/tContained Metal: 134200Contained Unit: ozView all detailsHide details
Identity
- Project
- Lookout Mountain
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- MUX
Resource scope
- Estimate type
- resource
- Resource group id
- resource:5748d7b55f7a8b619bd5
Resource Data
- Category
- inferred
- Tonnes
- 7290000
- Grade
- 0.57
- Grade Unit
- g/t
- Contained Metal
- 134200
- Contained Unit
- oz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-22T00:00:00.000Z
Reasoning: Inferred resource at Lookout Mountain.
Negative factors
- Supports previously announced results
Evidence · text
“Inferred Mineral Resources of 7.29 million tonnes at 0.57 g/t Au, containing 134,200 gold ounces”
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 Undisclosednegative
High-grade interval reported without stating the cut-off grade used for compositing.
Why it applies: no cutoff_grade was stated
indicatedWindfall · goldTonnes: 9400000Grade: 0.75Grade Unit: g/tContained Metal: 227500Contained Unit: ozView all detailsHide details
Identity
- Project
- Windfall
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- MUX
Resource scope
- Estimate type
- resource
- Resource group id
- resource:33834289346db367ecb3
Resource Data
- Category
- indicated
- Tonnes
- 9400000
- Grade
- 0.75
- Grade Unit
- g/t
- Contained Metal
- 227500
- Contained Unit
- oz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-22T00:00:00.000Z
Reasoning: Indicated resource at Windfall.
Positive factors
- Solid indicated resource
Negative factors
- Supports previously announced results
Evidence · text
“Indicated Mineral Resources of 9.40 million tonnes at 0.75 g/t Au, containing 227,500 gold ounces”
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
inferredWindfall · goldTonnes: 2600000Grade: 1.53Grade Unit: g/tContained Metal: 127800Contained Unit: ozView all detailsHide details
Identity
- Project
- Windfall
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- MUX
Resource scope
- Estimate type
- resource
- Resource group id
- resource:0ba53c482199ccab58f9
Resource Data
- Category
- inferred
- Tonnes
- 2600000
- Grade
- 1.53
- Grade Unit
- g/t
- Contained Metal
- 127800
- Contained Unit
- oz
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-07-22T00:00:00.000Z
Reasoning: Inferred resource at Windfall.
Positive factors
- High grade for inferred resource
Negative factors
- Supports previously announced results
Evidence · text
“Inferred Mineral Resources of 2.60 million tonnes at 1.53 g/t Au, containing 127,800 gold ounces”
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 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.