Stillwater Critical Minerals More Than Doubles Stillwater West Inferred Mineral Resource and Establishes Maiden Indicated Resource
Original announcement by tmx on
- Company
- Stillwater Critical Minerals Corp.
- Ticker
- PGE
- Exchange
- TSX
- Region
- Montana, USA
- Primary commodity
- Nickel
- Secondary commodities
- Copper, Cobalt, Platinum, Palladium, Gold, Rhodium, Chromium
- Document categories
- Resource update
- Extracted
- 2026-09-12 18:22:53 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Stillwater Critical Minerals has announced an updated 2026 Mineral Resource Estimate for the Stillwater West project, establishing a maiden Indicated resource of 29.4 Mt at 0.38% NiTEq. The total resource (Indicated + Inferred) now comprises 834.5 Mt containing significant quantities of nickel, copper, cobalt, and platinum group metals.
Reasoning: The update establishes a maiden Indicated resource and significantly expands the Inferred resource tonnage and contained metal, representing a major de-risking and scale milestone for the project.
Positive factors
- Establishment of maiden Indicated resource
- Substantial tonnage increase (doubled Inferred)
- Significant contained metal scale
- NI 43-101 compliant with QP sign-off
- Expansion of rhodium and chromium resources
Facts used in scoring: 3
Classification and evidence
Indicated Resourcepositive
Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves.
Why it applies: The company established its first Indicated Mineral Resource of 29.4 Mt.
Evidence · text
“First definition of an Indicated Mineral Resource”
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: The estimate was prepared by an independent QP in accordance with NI 43-101.
Evidence · text
“in accordance with National Instrument 43-101”
Tonnage Growthpositive
Tonnage increase reaching the strong tier vs prior estimate, with grade maintained or improved.
Why it applies: The Inferred resource has been significantly expanded (more than doubled).
Evidence · text
“More Than Doubles Stillwater West Inferred Mineral Resource”
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: Timothy O. Kuhl and Ted Eggleston are named as the Qualified Persons.
Evidence · text
“The Qualified Person for the estimate is Mr. Timothy O. Kuhl”
Extracted facts
Stored fact records: 3. Some facts used in scoring do not have a stored record.
Resource Estimates (3)
indicatedStillwater West · nickelTonnes: 29400000View all detailsHide details
Identity
- Project
- Stillwater West
- Commodity
- nickel
- Region
- usa_mt
- Reported Region
- Montana, USA
- Ticker
- PGE
Resource scope
- Estimate type
- resource
- Effective date
- 2026-08-27T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Timothy O. Kuhl, Ted Eggleston
- Resource group id
- resource:8e0d2c10e0eec8145b63
- Deposit or zone
- Stillwater West
- Mining method
- open_pit
- Ownership percent
- 100 %
- Resource basis
- gross
Resource Data
- Category
- indicated
- Tonnes
- 29400000
- Cutoff Grade
- 0.2
- Cutoff Unit
- % NiTEq
Prior Estimate
- Resource Date
- 2026-08-27
Metal Equivalent
- Metal Eq. Grade
- 0.38
- Metal Eq. Unit
- % NiTEq
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-27T00:00:00.000Z
Reasoning: First Indicated resource established for this zone.
Positive factors
- Maiden Indicated resource
Evidence · text
“29.4 million tonnes of Indicated Mineral Resources grading 0.38% NiTEq”
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
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredStillwater West · nickelTonnes: 805100000View all detailsHide details
Identity
- Project
- Stillwater West
- Commodity
- nickel
- Region
- usa_mt
- Reported Region
- Montana, USA
- Ticker
- PGE
Resource scope
- Estimate type
- resource
- Effective date
- 2026-08-27T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Timothy O. Kuhl, Ted Eggleston
- Resource group id
- resource:692d5261b5d223c7bb30
- Deposit or zone
- Stillwater West
- Mining method
- open_pit
- Ownership percent
- 100 %
- Resource basis
- gross
Resource Data
- Category
- inferred
- Tonnes
- 805100000
- Cutoff Grade
- 0.2
- Cutoff Unit
- % NiTEq
Prior Estimate
- Resource Date
- 2026-08-27
Metal Equivalent
- Metal Eq. Grade
- 0.34
- Metal Eq. Unit
- % NiTEq
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-27T00:00:00.000Z
Reasoning: Significant expansion of the Inferred resource base.
Positive factors
- Substantial expansion of tonnage
Evidence · text
“805.1 million tonnes of Inferred Mineral Resources grading 0.34% total nickel equivalent ("NiTEq")”
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
No Contained Metalnegative
Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting.
Why it applies: contained_metal was not reported
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
inferredStillwater West · chromiumContained Metal: 6.6Contained Unit: blbsView all detailsHide details
Identity
- Project
- Stillwater West
- Commodity
- chromium
- Region
- usa_mt
- Reported Region
- Montana, USA
- Ticker
- PGE
Resource scope
- Estimate type
- resource
- Effective date
- 2026-08-27T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Timothy O. Kuhl, Ted Eggleston
- Resource group id
- resource:837131c1e704fe8b12b2
- Deposit or zone
- Stillwater West
- Mining method
- open_pit
- Ownership percent
- 100 %
- Resource basis
- gross
Resource Data
- Category
- inferred
- Contained Metal
- 6.6
- Contained Unit
- blbs
Prior Estimate
- Resource Date
- 2026-08-27
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-27T00:00:00.000Z
Reasoning: Large chromium resource reported but not included in NiTEq calculations.
Positive factors
- Massive chromium resource expansion
Negative factors
- No economic or recovery assumptions made
Evidence · text
“Expansion of Inferred chromium resource to 6.6 Blbs”
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
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
Resource Updateneutral
Revised estimate for an existing resource — compare to prior to assess progress.
Why it applies: the release compares against a previous estimate
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.