American Tungsten Defines High-Grade Tungsten Mineral Resource in the United States at IMA Mine
Original announcement by orestocks on
- Company
- American Tungsten Corp.
- Ticker
- TUNG.CN
- Exchange
- Unavailable
- Region
- Idaho, U.S.
- Primary commodity
- Tungsten
- Secondary commodities
- Silver, Molybdenum, Copper, Lead
- Document categories
- Resource update
- Extracted
- 2026-08-20 11:48:24 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
American Tungsten Corp. announced a maiden NI 43-101 compliant Mineral Resource Estimate for its IMA Mine in Idaho, U.S., with an effective date of July 15, 2026. The MRE defines 316,000 tonnes of Indicated Resources at 0.55% WO₃ and 2,178,000 tonnes of Inferred Resources at 0.55% WO₃, along with significant silver, molybdenum, copper, and lead byproducts. An additional 267,000 tonnes of Indicated Resources at 0.155% WO₃ are contained in historical surface tailings, providing a potential lower-capital pathway to production.
Reasoning: American Tungsten announced a maiden NI 43-101 compliant Mineral Resource Estimate for its IMA Mine, defining high-grade tungsten and silver resources with significant growth potential. While the estimate is a key milestone and supports future economic studies, a large portion of the resource is in the Inferred category, and the extralateral rights supporting part of the resource are subject to challenge.
Positive factors
- high_grade_resource
- ni_43_101_compliant
- qp_signed
- growth_potential
- critical_mineral_focus
- existing_infrastructure
- pea_supporting
Negative factors
- large_inferred_component
- extralateral_rights_risk
Low confidence — this extraction should be reviewed alongside the original source.
Rubric flags
- M&I (Measured + Indicated) confidence tiers — The M&I percentage for the IMA Tungsten Vein System (12.67%) is weak (<25% M&I), indicating a high proportion of inferred resources.
- Contained metal scale by commodity — The total contained tungsten (13,680 tonnes WO₃) and silver (2.25 Moz Ag) are below the weak thresholds for comparable commodities, indicating a relatively small scale.
Facts used in scoring: 24
Classification and evidence
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: The Mineral Resource Estimate was prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects.
Evidence · text
“The MRE has an effective date of July 15, 2026 and was prepared by Minetech, LLC, in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects("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: The Mineral Resource estimates were prepared by Karl Swanson, SME-RM and AusIMM, an independent Qualified Person, and reviewed and approved by Austin Zinsser, P.G., SME-RM, a Qualified Person.
Evidence · text
“The Mineral Resource estimates were prepared by Karl Swanson, SME-RM and AusIMM, of Minetech, LLC,an independent Qualified Person for the purposes of NI 43-101. Technical information in this news release has been prepared in accordance with Canadian regulatory requirements set out in NI 43-101. Austin Zinsser, P.G., SME-RM, Vice President, Exploration for the Company, and a Qualified Person as defined by NI 43-101, has reviewed and approved the scientific and technical information in this news release.”
Maiden Resourceneutral
First formal MRE for the project — establishes baseline but typically exploration-stage with high Inferred component.
Why it applies: This announcement defines the first Mineral Resource Estimate for the IMA Mine by American Tungsten.
Evidence · text
“American Tungsten Defines High-Grade Tungsten Mineral Resource in the United States at IMA Mine”
PEA-Supportingneutral
Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study.
Why it applies: The MRE provides the technical foundation for advancing future resource and economic studies, including a Preliminary Economic Assessment.
Evidence · text
“The MRE provides the technical foundation for advancing future resource and economic studies, including a Preliminary Economic Assessment ("PEA").”
Cut-off Disclosedpositive
Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison.
Why it applies: The cut-off grades for both the tungsten vein system (0.20% WO₃) and historical tailings (0.0% WO₃ reported, 0.07% WO₃ effective) are clearly stated.
Evidence · text
“The underground tungsten vein system is reported at a cut-off grade of 0.20% WO₃... The effective cut-off grade for the IMA Historical Tailings is estimated at 0.07% WO₃... Tailings mineral resources are reported at 0.0% cut-off.”
Inferred Resourcenegative
Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone.
Why it applies: A significant portion of the resource, 2,178,000 tonnes, is classified as Inferred Mineral Resources.
Evidence · text
“2,178,000 tonnes of Inferred Mineral Resources grading 0.55% WO₃”
Extralateral Rights Risknegative · Story-specific tag
No canonical definition is currently available.
Why it applies: The Mineral Resource Estimate includes vein systems that rely on extralateral rights, which have not been adjudicated and may be subject to challenge.
Evidence · text
“While the Company believes its position of extralateral rights is well-supported by both the US mining law and the project geology and mineralization, such rights have not been adjudicated and may be subject to challenge by adjacent claim holders.”
Extracted facts
Stored fact records: 24. Some facts used in scoring do not have a stored record.
Resource Estimates (24)
indicatedIMA Mine · tungstenTonnes: 316000Grade: 0.553Grade Unit: % WO₃Contained Metal: 1747Contained Unit: tonnes WO₃View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- tungsten
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 316000
- Grade
- 0.553
- Grade Unit
- % WO₃
- Contained Metal
- 1747
- Contained Unit
- tonnes WO₃
- Cutoff Grade
- 0.2
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: High-grade indicated resource for a critical mineral, forming a key part of the maiden MRE and supporting future economic studies.
Positive factors
- high_grade_resource
- critical_mineral_focus
Evidence · table
“0.553”
Context: 316
indicatedIMA Mine · molybdenumTonnes: 316000Grade: 0.05Grade Unit: % MoS₂View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- molybdenum
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 316000
- Grade
- 0.05
- Grade Unit
- % MoS₂
- Cutoff Grade
- 0.2
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Minor byproduct molybdenum in the indicated resource, reported from the same block model as tungsten.
Evidence · table
“0.05”
Context: 316
indicatedIMA Mine · silverTonnes: 316000Grade: 1.16Grade Unit: oz/tContained Metal: 404000Contained Unit: ozView all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- silver
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 316000
- Grade
- 1.16
- Grade Unit
- oz/t
- Contained Metal
- 404000
- Contained Unit
- oz
- Cutoff Grade
- 0.2
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Significant byproduct silver resource in the indicated category, adding value to the project.
Evidence · table
“1.16”
Context: 316
indicatedIMA Mine · copperTonnes: 316000Grade: 0.09Grade Unit: %View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- copper
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 316000
- Grade
- 0.09
- Grade Unit
- %
- Cutoff Grade
- 0.2
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Minor byproduct copper in the indicated resource, reported from the same block model as tungsten.
Evidence · table
“0.09”
Context: 316
indicatedIMA Mine · leadTonnes: 316000Grade: 0.14Grade Unit: %View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- lead
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 316000
- Grade
- 0.14
- Grade Unit
- %
- Cutoff Grade
- 0.2
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Minor byproduct lead in the indicated resource, reported from the same block model as tungsten.
Evidence · table
“0.14”
Context: 316
inferredIMA Mine · tungstenTonnes: 2178000Grade: 0.548Grade Unit: % WO₃Contained Metal: 11933Contained Unit: tonnes WO₃View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- tungsten
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- inferred
- Tonnes
- 2178000
- Grade
- 0.548
- Grade Unit
- % WO₃
- Contained Metal
- 11933
- Contained Unit
- tonnes WO₃
- Cutoff Grade
- 0.2
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Significant inferred resource for a critical mineral, indicating growth potential but with lower geological confidence.
Positive factors
- high_grade_resource
- critical_mineral_focus
- growth_potential
Negative factors
- large_inferred_component
Evidence · table
“0.548”
Context: 2,178
inferredIMA Mine · molybdenumTonnes: 2178000Grade: 0.03Grade Unit: % MoS₂View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- molybdenum
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- inferred
- Tonnes
- 2178000
- Grade
- 0.03
- Grade Unit
- % MoS₂
- Cutoff Grade
- 0.2
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Minor byproduct molybdenum in the inferred resource, reported from the same block model as tungsten.
Negative factors
- large_inferred_component
Evidence · table
“0.03”
Context: 2,178
inferredIMA Mine · silverTonnes: 2178000Grade: 0.77Grade Unit: oz/tContained Metal: 1848000Contained Unit: ozView all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- silver
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- inferred
- Tonnes
- 2178000
- Grade
- 0.77
- Grade Unit
- oz/t
- Contained Metal
- 1848000
- Contained Unit
- oz
- Cutoff Grade
- 0.2
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Significant byproduct silver resource in the inferred category, adding value to the project.
Negative factors
- large_inferred_component
Evidence · table
“0.77”
Context: 2,178
inferredIMA Mine · copperTonnes: 2178000Grade: 0.06Grade Unit: %View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- copper
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- inferred
- Tonnes
- 2178000
- Grade
- 0.06
- Grade Unit
- %
- Cutoff Grade
- 0.2
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Minor byproduct copper in the inferred resource, reported from the same block model as tungsten.
Negative factors
- large_inferred_component
Evidence · table
“0.06”
Context: 2,178
inferredIMA Mine · leadTonnes: 2178000Grade: 0.07Grade Unit: %View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- lead
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- inferred
- Tonnes
- 2178000
- Grade
- 0.07
- Grade Unit
- %
- Cutoff Grade
- 0.2
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Minor byproduct lead in the inferred resource, reported from the same block model as tungsten.
Negative factors
- large_inferred_component
Evidence · table
“0.07”
Context: 2,178
indicatedIMA Mine · tungstenTonnes: 267000Grade: 0.155Grade Unit: % WO₃Contained Metal: 413Contained Unit: tonnes WO₃View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- tungsten
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 267000
- Grade
- 0.155
- Grade Unit
- % WO₃
- Contained Metal
- 413
- Contained Unit
- tonnes WO₃
- Cutoff Grade
- 0
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Indicated resource from historical tailings provides a lower-capital pathway to production, though at a lower grade than the vein system.
Positive factors
- existing_infrastructure
- lower_capital_pathway
Evidence · table
“0.155”
Context: 267
indicatedIMA Mine · molybdenumTonnes: 267000Grade: 0.02Grade Unit: % MoS₂View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- molybdenum
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 267000
- Grade
- 0.02
- Grade Unit
- % MoS₂
- Cutoff Grade
- 0
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Minor byproduct molybdenum in the indicated tailings resource.
Evidence · table
“0.02”
Context: 267
indicatedIMA Mine · silverTonnes: 267000Grade: 0.27Grade Unit: oz/tContained Metal: 79000Contained Unit: ozView all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- silver
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 267000
- Grade
- 0.27
- Grade Unit
- oz/t
- Contained Metal
- 79000
- Contained Unit
- oz
- Cutoff Grade
- 0
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Minor byproduct silver in the indicated tailings resource.
Evidence · table
“0.27”
Context: 267
indicatedIMA Mine · copperTonnes: 267000Grade: 0.02Grade Unit: %View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- copper
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 267000
- Grade
- 0.02
- Grade Unit
- %
- Cutoff Grade
- 0
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Trace byproduct copper in the indicated tailings resource.
Evidence · table
“0.02”
Context: 267
indicatedIMA Mine · leadTonnes: 267000Grade: 0.04Grade Unit: %View all detailsHide details
Identity
- Project
- IMA Mine
- Commodity
- lead
- Region
- usa_id
- Reported Region
- Idaho, U.S.
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 267000
- Grade
- 0.04
- Grade Unit
- %
- Cutoff Grade
- 0
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Trace byproduct lead in the indicated tailings resource.
Evidence · table
“0.04”
Context: 267
indicatedsilverTonnes: 316Grade: 1.16Grade Unit: oz/tView all detailsHide details
Identity
- Commodity
- silver
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 316
- Grade
- 1.16
- Grade Unit
- oz/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: High-grade indicated resource for a critical mineral, forming a key part of the maiden MRE and supporting future economic studies. (Expanded from multi-commodity resource table for completeness.)
Positive factors
- high_grade_resource
- critical_mineral_focus
Evidence · table
“1.16”
Context: 316
indicatedcopperTonnes: 316Grade: 0.09Grade Unit: %View all detailsHide details
Identity
- Commodity
- copper
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 316
- Grade
- 0.09
- Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: High-grade indicated resource for a critical mineral, forming a key part of the maiden MRE and supporting future economic studies. (Expanded from multi-commodity resource table for completeness.)
Positive factors
- high_grade_resource
- critical_mineral_focus
Evidence · table
“0.09”
Context: 316
indicatedleadTonnes: 316Grade: 0.14Grade Unit: %View all detailsHide details
Identity
- Commodity
- lead
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 316
- Grade
- 0.14
- Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: High-grade indicated resource for a critical mineral, forming a key part of the maiden MRE and supporting future economic studies. (Expanded from multi-commodity resource table for completeness.)
Positive factors
- high_grade_resource
- critical_mineral_focus
Evidence · table
“0.14”
Context: 316
inferredsilverTonnes: 2178Grade: 0.77Grade Unit: oz/tView all detailsHide details
Identity
- Commodity
- silver
- Ticker
- TUNG.CN
Resource Data
- Category
- inferred
- Tonnes
- 2178
- Grade
- 0.77
- Grade Unit
- oz/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Significant inferred resource for a critical mineral, indicating growth potential but with lower geological confidence. (Expanded from multi-commodity resource table for completeness.)
Positive factors
- high_grade_resource
- critical_mineral_focus
- growth_potential
Negative factors
- large_inferred_component
Evidence · table
“0.77”
Context: 2,178
inferredcopperTonnes: 2178Grade: 0.06Grade Unit: %View all detailsHide details
Identity
- Commodity
- copper
- Ticker
- TUNG.CN
Resource Data
- Category
- inferred
- Tonnes
- 2178
- Grade
- 0.06
- Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Significant inferred resource for a critical mineral, indicating growth potential but with lower geological confidence. (Expanded from multi-commodity resource table for completeness.)
Positive factors
- high_grade_resource
- critical_mineral_focus
- growth_potential
Negative factors
- large_inferred_component
Evidence · table
“0.06”
Context: 2,178
inferredleadTonnes: 2178Grade: 0.07Grade Unit: %View all detailsHide details
Identity
- Commodity
- lead
- Ticker
- TUNG.CN
Resource Data
- Category
- inferred
- Tonnes
- 2178
- Grade
- 0.07
- Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: Significant inferred resource for a critical mineral, indicating growth potential but with lower geological confidence. (Expanded from multi-commodity resource table for completeness.)
Positive factors
- high_grade_resource
- critical_mineral_focus
- growth_potential
Negative factors
- large_inferred_component
Evidence · table
“0.07”
Context: 2,178
indicatedsilverTonnes: 267Grade: 0.27Grade Unit: oz/tView all detailsHide details
Identity
- Commodity
- silver
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 267
- Grade
- 0.27
- Grade Unit
- oz/t
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: High-grade indicated resource for a critical mineral, forming a key part of the maiden MRE and supporting future economic studies. (Expanded from multi-commodity resource table for completeness.)
Positive factors
- high_grade_resource
- critical_mineral_focus
Evidence · table
“0.27”
Context: 267
indicatedcopperTonnes: 267Grade: 0.02Grade Unit: %View all detailsHide details
Identity
- Commodity
- copper
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 267
- Grade
- 0.02
- Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: High-grade indicated resource for a critical mineral, forming a key part of the maiden MRE and supporting future economic studies. (Expanded from multi-commodity resource table for completeness.)
Positive factors
- high_grade_resource
- critical_mineral_focus
Evidence · table
“0.02”
Context: 267
indicatedleadTonnes: 267Grade: 0.04Grade Unit: %View all detailsHide details
Identity
- Commodity
- lead
- Ticker
- TUNG.CN
Resource Data
- Category
- indicated
- Tonnes
- 267
- Grade
- 0.04
- Grade Unit
- %
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-20T00:00:00.000Z
Reasoning: High-grade indicated resource for a critical mineral, forming a key part of the maiden MRE and supporting future economic studies. (Expanded from multi-commodity resource table for completeness.)
Positive factors
- high_grade_resource
- critical_mineral_focus
Evidence · table
“0.04”
Context: 267
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.