Nevgold Files NI 43-101 Technical Report For Mineral Resource Estimate on the Limousine Butte Gold-Antimony Project, Nevada
Original announcement by tmx on
- Company
- Nevgold Corp.
- Ticker
- NAU
- Exchange
- TSX
- Region
- Nevada
- Primary commodity
- Gold
- Secondary commodities
- Antimony, Silver
- Document categories
- Resource update
- Extracted
- 2026-09-12 14:24:28 UTC
Analysis by Minestarters Atlas
Minestarters Atlas analysis
Summary
Nevgold Corp. has filed an NI 43-101 compliant technical report for its maiden Mineral Resource Estimate on the Limousine Butte gold-antimony project in Nevada, with an effective date of July 15, 2026. The MRE outlines a large-scale resource, including significant gold and antimony, and is signed off by Qualified Persons. The company highlights the potential for near-term antimony production from historical leach pads and notes that recent drilling has already expanded mineralization beyond this initial estimate.
Reasoning: Nevgold Corp. has filed its maiden NI 43-101 compliant MRE for the Limousine Butte project, establishing a significant gold-antimony resource, though a large portion is in the inferred category and the estimate may not reflect the most recent drilling.
Positive factors
- Maiden Mineral Resource Estimate establishes a baseline for the project
- NI 43-101 compliant and signed off by Qualified Persons
- Significant gold and antimony resources identified
- Potential for near-term antimony production from historical leach pads
- Metal equivalent assumptions for the main cut-off are disclosed
Negative factors
- A large portion of the resource is in the Inferred category, which is speculative
- The MRE effective date is July 15, 2026, but recent drilling has already expanded mineralization, suggesting the estimate is not fully current
Low confidence — this extraction should be reviewed alongside the original source.
Facts used in scoring: 79
Classification and evidence
Maiden Resourceneutral
First formal MRE for the project — establishes baseline but typically exploration-stage with high Inferred component. No prior estimate exists, so every change band is not applicable.
Why it applies: The document explicitly states this is a 'maiden Mineral Resource Estimate'.
Evidence · text
“maiden Mineral Resource Estimate”
NI 43-101 Compliantpositive
Resource estimate prepared in compliance with NI 43-101 (Canada) — high reporting standard.
Why it applies: The technical report was prepared 'in accordance with National Instrument 43-101'.
Evidence · text
“in accordance with National Instrument 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 report was 'prepared by Gregory Z. Mosher, P. Geo., M.Sc. Applied, and Daniel W. Kappes, P.E.' and 'reviewed and approved by Greg French, CPG'.
Evidence · text
“prepared by Gregory Z. Mosher, P. Geo., M.Sc. Applied, and Daniel W. Kappes, P.E. in accordance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects (“ NI 43-101 ”) and supports the MRE disclosure made by the Company in its news release dated July 15, 2026. A full copy of the Technical Report can be found at SEDAR+ ( www.sedarplus.ca ) under the Company’s issuer profile. There are no material differences between the MRE in the Technical Report and the information previously disclosed in the Company’s news release dated July 15, 2026. NevGold CEO, Brandon Bonifacio, comments: “Our maiden, large-scale, oxide gold-antimony Mineral Resource Estimate was an important first step in delivering on our uniquely positioned opportunity at Limo Butte. We have delivered on one of the largest, most strategic, gold-antimony resources in the United States , and our recently announced first drill results from 2026 have already expanded mineralization from the initial MRE. We have the potential to advance Limo Butte to a near-term antimony production scenario from the already mined material on surface from the historical gold leach pads, while we systematically advance the other deposits with further drilling to add scale and increase grade . We have also made strong progress advancing the next phase of Engineering Studies, which is another key upcoming milestone for the Project. We will continue to build off this initial MRE, as it will be a very active next period as our drill program continues with over 35 holes with assays pending .” Limousine Butte Maiden Mineral Resource Estimate The tables below are extracted from the MRE disclosed in the Technical Report. Table 1 . Limo Butte – Consolidated Mineral Resource Estimate (see notes below) Zone Tonnes (Mt) Gold Grade (g/t) Ounces Gold Silver Grade (g/t) Silver Ounces Sb (%) Sb (t) Measured Leach Pads 1.0 0.31 9,500 2.80 87,000 0.26% 2,600 Indicated Leach Pads 1.2 0.29 11,600 2.43 96,700 0.30% 3,700 Pre-Strip Dump 0.09 0.30 900 0.13 400 0.65% 600 Resurrection 12.9 0.38 159,400 0.91 378,100 0.19% 24,900 Cadillac Valley - - - - - - - Northern Zones 8 - - - - - - - Total M&I 15.2 0.37 181,400 1.15 562,200 0.21% 31,800 Inferred Leach Pads - - - - - - - Pre-Strip Dump 0.05 0.28 400 0.03 40 0.99% 500 Resurrection 28.5 0.29 261,600 0.87 799,100 0.12% 34,600 Cadillac Valley 57.2 0.37 686,500 0.49 895,700 0.07% 40,600 Northern Zones 8 31.7 0.25 255,000 - - - - Total Inferred 117.5 0.32 1,203,500 0.61 1,694,840 0.09% 75,700 Table 2 . Limo Butte: Antimony Sub-Domains within the Consolidated Mineral Resource Estimate (see notes below) Zone Tonnes (Mt) Gold Grade (g/t) Ounces Gold Silver Grade (g/t) Silver Ounces Sb (%) Sb (t) Measured Leach Pads 1.0 0.31 9,500 2.80 87,000 0.26% 2,600 Indicated Leach Pads 1.2 0.29 11,600 2.44 96,700 0.30% 3,700 Pre-Strip Dump 0.09 0.30 900 0.13 400 0.65% 600 Resurrection 9.1 0.37 107,500 0.97 283,500 0.25% 22,700 Cadillac Valley - - - - - - - Northern Zones 8 - - - - - - - Total M&I 11.3 0.36 129,500 1.28 467,600 0.26% 29,600 Inferred Leach Pads - - - - - - - Pre-Strip Dump 0.04 0.28 400 0.03 40 1.02% 500 Resurrection 14.1 0.19 87,300 0.61 275,700 0.20% 27,600 Cadillac Valley 12.7 0.26 108,400 0.53 218,100 0.16% 20,000 Northern Zones 8 - - - - - - - Total Inferred 26.9 0.23 196,100 0.57 493,900 0.18% 48,100 Table 3 . Limo Butte – Cut-Off Sensitivity Table (see notes below) Classification Tonnes (Mt) Gold Grade (g/t) Ounces Gold Silver Grade (g/t) Silver Ounces Sb (%) Sb (t) 0.60 g/t AuEq. cut-off Measured & Indicated 8.9 0.51 144,200 1.41 400,000 0.28% 25,100 Inferred 51.8 0.41 690,700 1.08 700,220 0.14% 28,600 0.45 g/t AuEq. cut-off Measured & Indicated 11.3 0.44 160,600 1.28 463,100 0.25% 28,400 Inferred 70.3 0.38 868,000 0.83 1,036,340 0.12% 46,000 0.30 g/t AuEq. cut-off Measured & Indicated 15.2 0.37 181,400 1.15 562,200 0.21% 31,800 Inferred 117.5 0.32 1,203,500 0.61 1,694,840 0.09% 75,700 0.15 g/t AuEq. cut-off Measured & Indicated 23.1 0.28 204,900 0.98 729,300 0.16% 36,100 Inferred 221.9 0.23 1,628,900 0.49 2,997,940 0.06% 114,000 Notes to Tables above: Effective date of this mineral resource estimate is July 15, 2026. All mineral resources have been estimated in accordance with Canadian Institute of Mining, Metallurgy and Petroleum definitions, as required under NI 43-101 . The Mineral Resource Statement was prepared by Greg Mosher, P. Geo (Global Mineral Resource Services, “ GMRS ”) in accordance with NI 43-101. Ounce (troy) = metric tonnes x grade / 31.10348. All numbers have been rounded to reflect the relative accuracy of the estimate. The quantity and grade of reported Inferred Mineral Resources are uncertain in nature and there has not been sufficient work to define these Inferred Mineral Resources as Indicated or Measured Mineral Resources. It is reasonably expected that many of the Inferred Mineral Resources could be upgraded to Indicated Mineral Resources with continued exploration, however, there is no assurance that further exploration will result in all or any part of the Inferred Mineral Resources being converted into Indicated Mineral Resources. Tonnages and ounces in the tables are rounded to the nearest thousand and hundred, respectively. Numbers may not total due to rounding. There are no known legal, political, environmental, or other risks that could materially affect the development of the mineral resources. Mineral Resources for Leach Pads, Pre-Strip Dump, Resurrection, and Cadillac Valley are reported at a cut-off grade of 0.30 g/t AuEq. for an open-pit mining scenario contemplating recovery of gold and antimony. Cut-off grades are based on a price of US$3,000/oz gold and US$35,000/tonne antimony, and a number of operating cost and recovery assumptions, including a reasonable contingency factor. Metallurgical recoveries of 80% for gold, and 75% for antimony were used. Densities based on lithology were assigned. Mineral Resources for Northern Zones are reported at a cut-off grade of 0.15 g/t Au for an open-pit mining scenario contemplating recovery of gold as there is currently no antimony data for the Northern Zones. Cut-off grade was based on a price of US$3,000/oz gold, and a number of operating cost and recovery assumptions, including a reasonable contingency factor. Metallurgical recoveries of 80% for gold was used. Densities based on lithology were assigned. Antimony mineral resources are reported as a subset of the total mineral resource within the conceptual pit shells used to constrain the total mineral resource in order to demonstrate potential for economic viability, as required under NI 43-101; mineralization outside of these pit shells is not reported as a mineral resource. Mineral resources are not mineral reserves and do not have demonstrated economic viability. There is no guarantee that all or any part of the estimated mineral resources will be converted into mineral reserves. These Mineral Resource estimates include inferred Mineral Resources that are considered too speculative geologically to have economic considerations applied to them that would enable them to be categorized as Mineral Reserves. All figures are rounded to reflect the relative accuracy of the estimate. Notes to Table 2: Open pit antimony subdomain is reported at a cutoff grade 0.1% antimony within the overall 0.30 g/t AuEq. cutoff. These higher-grade antimony zones are reported separately in Table 2 to illustrate the potential for antimony production from the Project and are contained within the overall mineral resource estimate reported in Table 1. Antimony zones are reported only if they lie within the global resource estimate in Table 1. Readers are encouraged to review the Technical Report for detailed information pertaining to the MRE and underlying assumptions, disclaimers and other important information. Technical information contained in this news release has been reviewed and approved by Greg French, CPG, the Company’s Vice President, Exploration, who is NevGold’s Qualified Person under NI 43-101 and responsible for technical matters of this release. ON BEHALF OF THE BOARD “Signed” Brandon Bonifacio, President & CEO For further information, please contact Brandon Bonifacio at bbonifacio@nev-gold.com, call 604-337-4997, or visit our website at www.nev-gold.com . About the Company NevGold is dedicated to discovering, de-risking, and rapidly advancing gold and critical metals projects across premier jurisdictions in Nevada and Idaho to drive shareholder value and strengthen US mineral security. The Company holds a 100% interest in the Limousine Butte (gold-antimony) and Cedar Wash (gold) projects in Nevada, and the Nutmeg Mountain (gold) and Zeus (copper) projects in Idaho. For more information, please visit www.nev-gold.com . Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. Cautionary Note Regarding Forward Looking Statements This news release contains forward-looking statements that are based on the Company’s current expectations and estimates. Forward-looking statements are frequently characterized by words such as “plan”, “expect”, “project”, “intend”, “believe”, “anticipate”, “estimate”, “suggest”, “indicate” and other similar words or statements that certain events or conditions “may” or “will” occur. Forward-looking statements include, but are not limited to, statements regarding continued exploration on the Project, upgrading inferred mineral resources to indicated mineral resources, and entering the next phase of Engineering Studies. Such forward-looking statements involve known and unknown risks, uncertainties and other factors that could cause actual events or results to differ materially from estimated or anticipated events or results implied or expressed in such forward-looking statements. Such risks include, but are not limited to, dangers inherent in exploration, development and mining activities; the uncertainty of mineral resource estimates; actual exploration or development plans and costs differing materially from the Company’s estimates; obtaining additional financing from time-to-time to continue operations; compliance with government regulation; stock market volatility that may adversely affect the price of the Company’s securities; the ability to obtain and maintain any necessary permits, consents or authorizations required for mining activities; general economic, market and business conditions, and the ability to obtain all necessary regulatory approvals. There is some risk that the forward-looking statements will not prove to be accurate, that the management’s assumptions may not be correct or that actual results may differ materially from such forward-looking statements. Accordingly, readers should not place undue reliance on the forward-looking statements. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable securities laws, the Company disclaims any intent or obligation to update any forward-looking statement, whether as a result of new information, future events or results or otherwise. Forward-looking statements are not guarantees of future performance and accordingly undue reliance should not be put on such statements due to the inherent uncertainty therein.”
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 total resource is classified as Inferred, which is a speculative category.
Evidence · table
“117.5”
Context: Total Inferred
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 different zones and commodities are explicitly stated in the notes to the tables.
Evidence · text
“Mineral Resources for Leach Pads, Pre-Strip Dump, Resurrection, and Cadillac Valley are reported at a cut-off grade of 0.30 g/t AuEq.”
Metal Equivalent Assumptions Disclosedpositive · Story-specific tag
No canonical definition is currently available.
Why it applies: The document discloses the prices and recovery assumptions used for the AuEq calculation for the main cut-off grades.
Evidence · text
“Cut-off grades are based on a price of US$3,000/oz gold and US$35,000/tonne antimony, and a number of operating cost and recovery assumptions, including a reasonable contingency factor. Metallurgical recoveries of 80% for gold, and 75% for antimony were used.”
Stale Estimatenegative
Effective date is >2 years old — data currency concern, may not reflect current geological understanding.
Why it applies: The CEO states that 'recently announced first drill results from 2026 have already expanded mineralization from the initial MRE', indicating the MRE does not include the latest drilling.
Evidence · text
“our recently announced first drill results from 2026 have already expanded mineralization from the initial MRE.”
Extracted facts
Stored fact records: 79. Some facts used in scoring do not have a stored record.
Resource Estimates (79)
measuredLimousine Butte · goldTonnes: 1000000Grade: 0.31Grade Unit: g/tContained Metal: 9500Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:865d63534b16570cb9cd
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- measured
- Tonnes
- 1000000
- Grade
- 0.31
- Grade Unit
- g/t
- Contained Metal
- 9500
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured gold resource from leach pads, contributing to the maiden MRE with high confidence.
Positive factors
- Measured category indicates high confidence
- Part of the maiden MRE
Evidence · table
“0.31”
Context: 1.0
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
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
measuredLimousine Butte · silverTonnes: 1000000Grade: 2.8Grade Unit: g/tContained Metal: 87000Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:865d63534b16570cb9cd
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- measured
- Tonnes
- 1000000
- Grade
- 2.8
- Grade Unit
- g/t
- Contained Metal
- 87000
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured silver resource from leach pads, contributing to the maiden MRE with high confidence.
Positive factors
- Measured category indicates high confidence
- Part of the maiden MRE
Evidence · table
“2.80”
Context: 1.0
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
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
measuredLimousine Butte · antimonyTonnes: 1000000Grade: 0.26Grade Unit: %Contained Metal: 2600Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:865d63534b16570cb9cd
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- measured
- Tonnes
- 1000000
- Grade
- 0.26
- Grade Unit
- %
- Contained Metal
- 2600
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured antimony resource from leach pads, contributing to the maiden MRE with high confidence and potential for near-term production.
Positive factors
- Measured category indicates high confidence
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.26%”
Context: 1.0
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
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
indicatedLimousine Butte · goldTonnes: 1200000Grade: 0.29Grade Unit: g/tContained Metal: 11600Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:8bbae6baf0a8779f3949
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 1200000
- Grade
- 0.29
- Grade Unit
- g/t
- Contained Metal
- 11600
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated gold resource from leach pads, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.29”
Context: 1.2
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
indicatedLimousine Butte · silverTonnes: 1200000Grade: 2.43Grade Unit: g/tContained Metal: 96700Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:8bbae6baf0a8779f3949
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 1200000
- Grade
- 2.43
- Grade Unit
- g/t
- Contained Metal
- 96700
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated silver resource from leach pads, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“2.43”
Context: 1.2
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
indicatedLimousine Butte · antimonyTonnes: 1200000Grade: 0.3Grade Unit: %Contained Metal: 3700Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:8bbae6baf0a8779f3949
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 1200000
- Grade
- 0.3
- Grade Unit
- %
- Contained Metal
- 3700
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated antimony resource from leach pads, contributing to the maiden MRE and potential for near-term production.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.30%”
Context: 1.2
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
indicatedLimousine Butte · goldTonnes: 90000Grade: 0.3Grade Unit: g/tContained Metal: 900Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:21fbf4e677a434a85a3c
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 90000
- Grade
- 0.3
- Grade Unit
- g/t
- Contained Metal
- 900
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated gold resource from pre-strip dump, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.30”
Context: 0.09
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
indicatedLimousine Butte · silverTonnes: 90000Grade: 0.13Grade Unit: g/tContained Metal: 400Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:21fbf4e677a434a85a3c
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 90000
- Grade
- 0.13
- Grade Unit
- g/t
- Contained Metal
- 400
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated silver resource from pre-strip dump, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.13”
Context: 0.09
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
indicatedLimousine Butte · antimonyTonnes: 90000Grade: 0.65Grade Unit: %Contained Metal: 600Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:21fbf4e677a434a85a3c
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 90000
- Grade
- 0.65
- Grade Unit
- %
- Contained Metal
- 600
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated antimony resource from pre-strip dump, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.65%”
Context: 0.09
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
indicatedLimousine Butte · goldTonnes: 12900000Grade: 0.38Grade Unit: g/tContained Metal: 159400Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:c291e5feecd756665177
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 12900000
- Grade
- 0.38
- Grade Unit
- g/t
- Contained Metal
- 159400
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant indicated gold resource at Resurrection, forming a substantial part of the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Significant gold tonnage and contained metal
- Part of the maiden MRE
Evidence · table
“0.38”
Context: 12.9
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
indicatedLimousine Butte · silverTonnes: 12900000Grade: 0.91Grade Unit: g/tContained Metal: 378100Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:c291e5feecd756665177
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 12900000
- Grade
- 0.91
- Grade Unit
- g/t
- Contained Metal
- 378100
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated silver resource at Resurrection, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.91”
Context: 12.9
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
indicatedLimousine Butte · antimonyTonnes: 12900000Grade: 0.19Grade Unit: %Contained Metal: 24900Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:c291e5feecd756665177
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 12900000
- Grade
- 0.19
- Grade Unit
- %
- Contained Metal
- 24900
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant indicated antimony resource at Resurrection, forming a substantial part of the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Significant antimony tonnage and contained metal
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.19%”
Context: 12.9
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
indicatedLimousine Butte · goldTonnes: 15200000Grade: 0.37Grade Unit: g/tContained Metal: 181400Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:4196c0b49cbe03c11deb
- Deposit or zone
- Total M&I
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 15200000
- Grade
- 0.37
- Grade Unit
- g/t
- Contained Metal
- 181400
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Consolidated Measured and Indicated gold resource, representing a significant portion of the maiden MRE.
Positive factors
- Total M&I resource provides a strong base for the project
- Part of the maiden MRE
Evidence · table
“0.37”
Context: 15.2
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
indicatedLimousine Butte · silverTonnes: 15200000Grade: 1.15Grade Unit: g/tContained Metal: 562200Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:4196c0b49cbe03c11deb
- Deposit or zone
- Total M&I
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 15200000
- Grade
- 1.15
- Grade Unit
- g/t
- Contained Metal
- 562200
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Consolidated Measured and Indicated silver resource, contributing to the maiden MRE.
Positive factors
- Total M&I resource provides a strong base for the project
- Part of the maiden MRE
Evidence · table
“1.15”
Context: 15.2
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
indicatedLimousine Butte · antimonyTonnes: 15200000Grade: 0.21Grade Unit: %Contained Metal: 31800Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:4196c0b49cbe03c11deb
- Deposit or zone
- Total M&I
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 15200000
- Grade
- 0.21
- Grade Unit
- %
- Contained Metal
- 31800
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Consolidated Measured and Indicated antimony resource, representing a significant portion of the maiden MRE.
Positive factors
- Total M&I resource provides a strong base for the project
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.21%”
Context: 15.2
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
inferredLimousine Butte · goldTonnes: 50000Grade: 0.28Grade Unit: g/tContained Metal: 400Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:234b9809564f2451ebe4
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 50000
- Grade
- 0.28
- Grade Unit
- g/t
- Contained Metal
- 400
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred gold resource from pre-strip dump, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.28”
Context: 0.05
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
inferredLimousine Butte · silverTonnes: 50000Grade: 0.03Grade Unit: g/tContained Metal: 40Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:234b9809564f2451ebe4
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 50000
- Grade
- 0.03
- Grade Unit
- g/t
- Contained Metal
- 40
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred silver resource from pre-strip dump, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.03”
Context: 0.05
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
inferredLimousine Butte · antimonyTonnes: 50000Grade: 0.99Grade Unit: %Contained Metal: 500Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:234b9809564f2451ebe4
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 50000
- Grade
- 0.99
- Grade Unit
- %
- Contained Metal
- 500
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred antimony resource from pre-strip dump, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.99%”
Context: 0.05
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
inferredLimousine Butte · goldTonnes: 28500000Grade: 0.29Grade Unit: g/tContained Metal: 261600Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:12c34d41529e7d379b3d
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 28500000
- Grade
- 0.29
- Grade Unit
- g/t
- Contained Metal
- 261600
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant inferred gold resource at Resurrection, contributing to the maiden MRE but with lower confidence.
Positive factors
- Significant gold tonnage and contained metal
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.29”
Context: 28.5
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
inferredLimousine Butte · silverTonnes: 28500000Grade: 0.87Grade Unit: g/tContained Metal: 799100Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:12c34d41529e7d379b3d
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 28500000
- Grade
- 0.87
- Grade Unit
- g/t
- Contained Metal
- 799100
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant inferred silver resource at Resurrection, contributing to the maiden MRE but with lower confidence.
Positive factors
- Significant silver contained metal
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.87”
Context: 28.5
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
inferredLimousine Butte · antimonyTonnes: 28500000Grade: 0.12Grade Unit: %Contained Metal: 34600Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:12c34d41529e7d379b3d
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 28500000
- Grade
- 0.12
- Grade Unit
- %
- Contained Metal
- 34600
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant inferred antimony resource at Resurrection, contributing to the maiden MRE but with lower confidence.
Positive factors
- Significant antimony tonnage and contained metal
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.12%”
Context: 28.5
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
inferredLimousine Butte · goldTonnes: 57200000Grade: 0.37Grade Unit: g/tContained Metal: 686500Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:62d849349850eb706d5d
- Deposit or zone
- Cadillac Valley
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 57200000
- Grade
- 0.37
- Grade Unit
- g/t
- Contained Metal
- 686500
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Large inferred gold resource at Cadillac Valley, forming a significant part of the maiden MRE but with lower confidence.
Positive factors
- Large gold tonnage and contained metal
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.37”
Context: 57.2
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
inferredLimousine Butte · silverTonnes: 57200000Grade: 0.49Grade Unit: g/tContained Metal: 895700Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:62d849349850eb706d5d
- Deposit or zone
- Cadillac Valley
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 57200000
- Grade
- 0.49
- Grade Unit
- g/t
- Contained Metal
- 895700
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant inferred silver resource at Cadillac Valley, contributing to the maiden MRE but with lower confidence.
Positive factors
- Significant silver contained metal
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.49”
Context: 57.2
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
inferredLimousine Butte · antimonyTonnes: 57200000Grade: 0.07Grade Unit: %Contained Metal: 40600Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:62d849349850eb706d5d
- Deposit or zone
- Cadillac Valley
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 57200000
- Grade
- 0.07
- Grade Unit
- %
- Contained Metal
- 40600
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant inferred antimony resource at Cadillac Valley, contributing to the maiden MRE but with lower confidence.
Positive factors
- Significant antimony tonnage and contained metal
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.07%”
Context: 57.2
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
inferredLimousine Butte · goldTonnes: 31700000Grade: 0.25Grade Unit: g/tContained Metal: 255000Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:a38159977aaa45c39d2d
- Deposit or zone
- Northern Zones
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 31700000
- Grade
- 0.25
- Grade Unit
- g/t
- Contained Metal
- 255000
- Contained Unit
- oz
- Cutoff Grade
- 0.15
- Cutoff Unit
- g/t Au
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant inferred gold resource at Northern Zones, contributing to the maiden MRE but with lower confidence and no antimony data.
Positive factors
- Significant gold tonnage and contained metal
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
- No antimony data for this zone
Evidence · table
“0.25”
Context: 31.7
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
inferredLimousine Butte · goldTonnes: 117500000Grade: 0.32Grade Unit: g/tContained Metal: 1203500Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:a41ecbb1f27edfbe323e
- Deposit or zone
- Total Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117500000
- Grade
- 0.32
- Grade Unit
- g/t
- Contained Metal
- 1203500
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Large inferred gold resource, representing a significant portion of the maiden MRE but with lower confidence.
Positive factors
- Large gold tonnage and contained metal
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.32”
Context: 117.5
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
inferredLimousine Butte · silverTonnes: 117500000Grade: 0.61Grade Unit: g/tContained Metal: 1694840Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:a41ecbb1f27edfbe323e
- Deposit or zone
- Total Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117500000
- Grade
- 0.61
- Grade Unit
- g/t
- Contained Metal
- 1694840
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Large inferred silver resource, contributing to the maiden MRE but with lower confidence.
Positive factors
- Large silver contained metal
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.61”
Context: 117.5
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
inferredLimousine Butte · antimonyTonnes: 117500000Grade: 0.09Grade Unit: %Contained Metal: 75700Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:a41ecbb1f27edfbe323e
- Deposit or zone
- Total Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117500000
- Grade
- 0.09
- Grade Unit
- %
- Contained Metal
- 75700
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Large inferred antimony resource, contributing to the maiden MRE but with lower confidence.
Positive factors
- Large antimony tonnage and contained metal
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.09%”
Context: 117.5
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
measuredLimousine Butte · goldTonnes: 1000000Grade: 0.31Grade Unit: g/tContained Metal: 9500Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:865d63534b16570cb9cd
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- measured
- Tonnes
- 1000000
- Grade
- 0.31
- Grade Unit
- g/t
- Contained Metal
- 9500
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured gold resource from leach pads, contributing to the maiden MRE with high confidence.
Positive factors
- Measured category indicates high confidence
- Part of the maiden MRE
Evidence · table
“0.31”
Context: 1.0
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
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
measuredLimousine Butte · silverTonnes: 1000000Grade: 2.8Grade Unit: g/tContained Metal: 87000Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:865d63534b16570cb9cd
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- measured
- Tonnes
- 1000000
- Grade
- 2.8
- Grade Unit
- g/t
- Contained Metal
- 87000
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured silver resource from leach pads, contributing to the maiden MRE with high confidence.
Positive factors
- Measured category indicates high confidence
- Part of the maiden MRE
Evidence · table
“2.80”
Context: 1.0
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
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
measuredLimousine Butte · antimonyTonnes: 1000000Grade: 0.26Grade Unit: %Contained Metal: 2600Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:865d63534b16570cb9cd
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- measured
- Tonnes
- 1000000
- Grade
- 0.26
- Grade Unit
- %
- Contained Metal
- 2600
- Contained Unit
- t
- Cutoff Grade
- 0.1
- Cutoff Unit
- % antimony
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured antimony resource from leach pads, contributing to the maiden MRE with high confidence and potential for near-term production.
Positive factors
- Measured category indicates high confidence
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.26%”
Context: 1.0
Tags used in scoring
Measured Resourcepositive
Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves.
Why it applies: category is "measured"
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
indicatedLimousine Butte · goldTonnes: 1200000Grade: 0.29Grade Unit: g/tContained Metal: 11600Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:8bbae6baf0a8779f3949
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 1200000
- Grade
- 0.29
- Grade Unit
- g/t
- Contained Metal
- 11600
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated gold resource from leach pads, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.29”
Context: 1.2
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
indicatedLimousine Butte · silverTonnes: 1200000Grade: 2.44Grade Unit: g/tContained Metal: 96700Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:8bbae6baf0a8779f3949
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 1200000
- Grade
- 2.44
- Grade Unit
- g/t
- Contained Metal
- 96700
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated silver resource from leach pads, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“2.44”
Context: 1.2
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
indicatedLimousine Butte · antimonyTonnes: 1200000Grade: 0.3Grade Unit: %Contained Metal: 3700Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:8bbae6baf0a8779f3949
- Deposit or zone
- Leach Pads
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 1200000
- Grade
- 0.3
- Grade Unit
- %
- Contained Metal
- 3700
- Contained Unit
- t
- Cutoff Grade
- 0.1
- Cutoff Unit
- % antimony
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated antimony resource from leach pads, contributing to the maiden MRE and potential for near-term production.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.30%”
Context: 1.2
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
indicatedLimousine Butte · goldTonnes: 90000Grade: 0.3Grade Unit: g/tContained Metal: 900Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:21fbf4e677a434a85a3c
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 90000
- Grade
- 0.3
- Grade Unit
- g/t
- Contained Metal
- 900
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated gold resource from pre-strip dump, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.30”
Context: 0.09
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
indicatedLimousine Butte · silverTonnes: 90000Grade: 0.13Grade Unit: g/tContained Metal: 400Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:21fbf4e677a434a85a3c
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 90000
- Grade
- 0.13
- Grade Unit
- g/t
- Contained Metal
- 400
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated silver resource from pre-strip dump, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.13”
Context: 0.09
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
indicatedLimousine Butte · antimonyTonnes: 90000Grade: 0.65Grade Unit: %Contained Metal: 600Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:21fbf4e677a434a85a3c
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 90000
- Grade
- 0.65
- Grade Unit
- %
- Contained Metal
- 600
- Contained Unit
- t
- Cutoff Grade
- 0.1
- Cutoff Unit
- % antimony
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated antimony resource from pre-strip dump, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.65%”
Context: 0.09
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
indicatedLimousine Butte · goldTonnes: 9100000Grade: 0.37Grade Unit: g/tContained Metal: 107500Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:71686fc7ae3ccb4d51d4
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 9100000
- Grade
- 0.37
- Grade Unit
- g/t
- Contained Metal
- 107500
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant indicated gold resource at Resurrection, forming a substantial part of the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Significant gold tonnage and contained metal
- Part of the maiden MRE
Evidence · table
“0.37”
Context: 9.1
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
indicatedLimousine Butte · silverTonnes: 9100000Grade: 0.97Grade Unit: g/tContained Metal: 283500Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:71686fc7ae3ccb4d51d4
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 9100000
- Grade
- 0.97
- Grade Unit
- g/t
- Contained Metal
- 283500
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Indicated silver resource at Resurrection, contributing to the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.97”
Context: 9.1
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
indicatedLimousine Butte · antimonyTonnes: 9100000Grade: 0.25Grade Unit: %Contained Metal: 22700Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:71686fc7ae3ccb4d51d4
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 9100000
- Grade
- 0.25
- Grade Unit
- %
- Contained Metal
- 22700
- Contained Unit
- t
- Cutoff Grade
- 0.1
- Cutoff Unit
- % antimony
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant indicated antimony resource at Resurrection, forming a substantial part of the maiden MRE.
Positive factors
- Indicated category provides reasonable confidence
- Significant antimony tonnage and contained metal
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.25%”
Context: 9.1
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
indicatedLimousine Butte · goldTonnes: 11300000Grade: 0.36Grade Unit: g/tContained Metal: 129500Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:4fbf4a3d451f25cce562
- Deposit or zone
- Total M&I
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 11300000
- Grade
- 0.36
- Grade Unit
- g/t
- Contained Metal
- 129500
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Consolidated Measured and Indicated gold resource, representing a significant portion of the maiden MRE.
Positive factors
- Total M&I resource provides a strong base for the project
- Part of the maiden MRE
Evidence · table
“0.36”
Context: 11.3
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
indicatedLimousine Butte · silverTonnes: 11300000Grade: 1.28Grade Unit: g/tContained Metal: 467600Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:4fbf4a3d451f25cce562
- Deposit or zone
- Total M&I
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 11300000
- Grade
- 1.28
- Grade Unit
- g/t
- Contained Metal
- 467600
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Consolidated Measured and Indicated silver resource, contributing to the maiden MRE.
Positive factors
- Total M&I resource provides a strong base for the project
- Part of the maiden MRE
Evidence · table
“1.28”
Context: 11.3
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
indicatedLimousine Butte · antimonyTonnes: 11300000Grade: 0.26Grade Unit: %Contained Metal: 29600Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:4fbf4a3d451f25cce562
- Deposit or zone
- Total M&I
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 11300000
- Grade
- 0.26
- Grade Unit
- %
- Contained Metal
- 29600
- Contained Unit
- t
- Cutoff Grade
- 0.1
- Cutoff Unit
- % antimony
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Consolidated Measured and Indicated antimony resource, representing a significant portion of the maiden MRE.
Positive factors
- Total M&I resource provides a strong base for the project
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.26%”
Context: 11.3
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
inferredLimousine Butte · goldTonnes: 40000Grade: 0.28Grade Unit: g/tContained Metal: 400Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:ec9451fd11af6169bf66
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 40000
- Grade
- 0.28
- Grade Unit
- g/t
- Contained Metal
- 400
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred gold resource from pre-strip dump, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.28”
Context: 0.04
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
inferredLimousine Butte · silverTonnes: 40000Grade: 0.03Grade Unit: g/tContained Metal: 40Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:ec9451fd11af6169bf66
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 40000
- Grade
- 0.03
- Grade Unit
- g/t
- Contained Metal
- 40
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred silver resource from pre-strip dump, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.03”
Context: 0.04
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
inferredLimousine Butte · antimonyTonnes: 40000Grade: 1.02Grade Unit: %Contained Metal: 500Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:ec9451fd11af6169bf66
- Deposit or zone
- Pre-Strip Dump
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 40000
- Grade
- 1.02
- Grade Unit
- %
- Contained Metal
- 500
- Contained Unit
- t
- Cutoff Grade
- 0.1
- Cutoff Unit
- % antimony
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred antimony resource from pre-strip dump, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“1.02%”
Context: 0.04
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
inferredLimousine Butte · goldTonnes: 14100000Grade: 0.19Grade Unit: g/tContained Metal: 87300Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:7652de20b46cbdfb315a
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 14100000
- Grade
- 0.19
- Grade Unit
- g/t
- Contained Metal
- 87300
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred gold resource at Resurrection, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.19”
Context: 14.1
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
inferredLimousine Butte · silverTonnes: 14100000Grade: 0.61Grade Unit: g/tContained Metal: 275700Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:7652de20b46cbdfb315a
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 14100000
- Grade
- 0.61
- Grade Unit
- g/t
- Contained Metal
- 275700
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred silver resource at Resurrection, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.61”
Context: 14.1
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
inferredLimousine Butte · antimonyTonnes: 14100000Grade: 0.2Grade Unit: %Contained Metal: 27600Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:7652de20b46cbdfb315a
- Deposit or zone
- Resurrection
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 14100000
- Grade
- 0.2
- Grade Unit
- %
- Contained Metal
- 27600
- Contained Unit
- t
- Cutoff Grade
- 0.1
- Cutoff Unit
- % antimony
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred antimony resource at Resurrection, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.20%”
Context: 14.1
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
inferredLimousine Butte · goldTonnes: 12700000Grade: 0.26Grade Unit: g/tContained Metal: 108400Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:d96c9e3f7a41fdbd7505
- Deposit or zone
- Cadillac Valley
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 12700000
- Grade
- 0.26
- Grade Unit
- g/t
- Contained Metal
- 108400
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred gold resource at Cadillac Valley, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.26”
Context: 12.7
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
inferredLimousine Butte · silverTonnes: 12700000Grade: 0.53Grade Unit: g/tContained Metal: 218100Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:d96c9e3f7a41fdbd7505
- Deposit or zone
- Cadillac Valley
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 12700000
- Grade
- 0.53
- Grade Unit
- g/t
- Contained Metal
- 218100
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred silver resource at Cadillac Valley, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.53”
Context: 12.7
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
inferredLimousine Butte · antimonyTonnes: 12700000Grade: 0.16Grade Unit: %Contained Metal: 20000Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:d96c9e3f7a41fdbd7505
- Deposit or zone
- Cadillac Valley
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 12700000
- Grade
- 0.16
- Grade Unit
- %
- Contained Metal
- 20000
- Contained Unit
- t
- Cutoff Grade
- 0.1
- Cutoff Unit
- % antimony
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred antimony resource at Cadillac Valley, contributing to the maiden MRE but with lower confidence.
Positive factors
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.16%”
Context: 12.7
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
inferredLimousine Butte · goldTonnes: 26900000Grade: 0.23Grade Unit: g/tContained Metal: 196100Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:d8801537b4efb6fdf5ca
- Deposit or zone
- Total Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 26900000
- Grade
- 0.23
- Grade Unit
- g/t
- Contained Metal
- 196100
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Large inferred gold resource, representing a significant portion of the maiden MRE but with lower confidence.
Positive factors
- Significant gold tonnage and contained metal
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.23”
Context: 26.9
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
inferredLimousine Butte · silverTonnes: 26900000Grade: 0.57Grade Unit: g/tContained Metal: 493900Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:d8801537b4efb6fdf5ca
- Deposit or zone
- Total Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 26900000
- Grade
- 0.57
- Grade Unit
- g/t
- Contained Metal
- 493900
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant inferred silver resource, contributing to the maiden MRE but with lower confidence.
Positive factors
- Significant silver contained metal
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.57”
Context: 26.9
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
inferredLimousine Butte · antimonyTonnes: 26900000Grade: 0.18Grade Unit: %Contained Metal: 48100Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:d8801537b4efb6fdf5ca
- Deposit or zone
- Total Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 26900000
- Grade
- 0.18
- Grade Unit
- %
- Contained Metal
- 48100
- Contained Unit
- t
- Cutoff Grade
- 0.1
- Cutoff Unit
- % antimony
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Significant inferred antimony resource, contributing to the maiden MRE but with lower confidence.
Positive factors
- Significant antimony tonnage and contained metal
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.18%”
Context: 26.9
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
indicatedLimousine Butte · goldTonnes: 8900000Grade: 0.51Grade Unit: g/tContained Metal: 144200Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:e97ddec4f8648dc2d11f
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 8900000
- Grade
- 0.51
- Grade Unit
- g/t
- Contained Metal
- 144200
- Contained Unit
- oz
- Cutoff Grade
- 0.6
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated gold resource at a higher cut-off, showing grade sensitivity.
Positive factors
- Higher grade at this cut-off
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.51”
Context: 8.9
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
indicatedLimousine Butte · silverTonnes: 8900000Grade: 1.41Grade Unit: g/tContained Metal: 400000Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:e97ddec4f8648dc2d11f
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 8900000
- Grade
- 1.41
- Grade Unit
- g/t
- Contained Metal
- 400000
- Contained Unit
- oz
- Cutoff Grade
- 0.6
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated silver resource at a higher cut-off, showing grade sensitivity.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“1.41”
Context: 8.9
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
indicatedLimousine Butte · antimonyTonnes: 8900000Grade: 0.28Grade Unit: %Contained Metal: 25100Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:e97ddec4f8648dc2d11f
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 8900000
- Grade
- 0.28
- Grade Unit
- %
- Contained Metal
- 25100
- Contained Unit
- t
- Cutoff Grade
- 0.6
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated antimony resource at a higher cut-off, showing grade sensitivity.
Positive factors
- Higher grade at this cut-off
- Indicated category provides reasonable confidence
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.28%”
Context: 8.9
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
inferredLimousine Butte · goldTonnes: 51800000Grade: 0.41Grade Unit: g/tContained Metal: 690700Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:c929ee5421cb6e20830f
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 51800000
- Grade
- 0.41
- Grade Unit
- g/t
- Contained Metal
- 690700
- Contained Unit
- oz
- Cutoff Grade
- 0.6
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred gold resource at a higher cut-off, showing grade sensitivity but with lower confidence.
Positive factors
- Large gold tonnage and contained metal at a higher cut-off
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.41”
Context: 51.8
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
inferredLimousine Butte · silverTonnes: 51800000Grade: 1.08Grade Unit: g/tContained Metal: 700220Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:c929ee5421cb6e20830f
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 51800000
- Grade
- 1.08
- Grade Unit
- g/t
- Contained Metal
- 700220
- Contained Unit
- oz
- Cutoff Grade
- 0.6
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred silver resource at a higher cut-off, showing grade sensitivity but with lower confidence.
Positive factors
- Significant silver contained metal at a higher cut-off
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“1.08”
Context: 51.8
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
inferredLimousine Butte · antimonyTonnes: 51800000Grade: 0.14Grade Unit: %Contained Metal: 28600Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:c929ee5421cb6e20830f
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 51800000
- Grade
- 0.14
- Grade Unit
- %
- Contained Metal
- 28600
- Contained Unit
- t
- Cutoff Grade
- 0.6
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred antimony resource at a higher cut-off, showing grade sensitivity but with lower confidence.
Positive factors
- Significant antimony tonnage and contained metal at a higher cut-off
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.14%”
Context: 51.8
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
indicatedLimousine Butte · goldTonnes: 11300000Grade: 0.44Grade Unit: g/tContained Metal: 160600Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:547b07e974746e92cac2
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 11300000
- Grade
- 0.44
- Grade Unit
- g/t
- Contained Metal
- 160600
- Contained Unit
- oz
- Cutoff Grade
- 0.45
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated gold resource at a mid-range cut-off, showing grade sensitivity.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.44”
Context: 11.3
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
indicatedLimousine Butte · silverTonnes: 11300000Grade: 1.28Grade Unit: g/tContained Metal: 463100Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:547b07e974746e92cac2
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 11300000
- Grade
- 1.28
- Grade Unit
- g/t
- Contained Metal
- 463100
- Contained Unit
- oz
- Cutoff Grade
- 0.45
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated silver resource at a mid-range cut-off, showing grade sensitivity.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“1.28”
Context: 11.3
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
indicatedLimousine Butte · antimonyTonnes: 11300000Grade: 0.25Grade Unit: %Contained Metal: 28400Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:547b07e974746e92cac2
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 11300000
- Grade
- 0.25
- Grade Unit
- %
- Contained Metal
- 28400
- Contained Unit
- t
- Cutoff Grade
- 0.45
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated antimony resource at a mid-range cut-off, showing grade sensitivity.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.25%”
Context: 11.3
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
inferredLimousine Butte · goldTonnes: 70300000Grade: 0.38Grade Unit: g/tContained Metal: 868000Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:27699d6b2d7ff3ac0389
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 70300000
- Grade
- 0.38
- Grade Unit
- g/t
- Contained Metal
- 868000
- Contained Unit
- oz
- Cutoff Grade
- 0.45
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred gold resource at a mid-range cut-off, showing grade sensitivity but with lower confidence.
Positive factors
- Large gold tonnage and contained metal at a mid-range cut-off
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.38”
Context: 70.3
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
inferredLimousine Butte · silverTonnes: 70300000Grade: 0.83Grade Unit: g/tContained Metal: 1036340Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:27699d6b2d7ff3ac0389
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 70300000
- Grade
- 0.83
- Grade Unit
- g/t
- Contained Metal
- 1036340
- Contained Unit
- oz
- Cutoff Grade
- 0.45
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred silver resource at a mid-range cut-off, showing grade sensitivity but with lower confidence.
Positive factors
- Large silver contained metal at a mid-range cut-off
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.83”
Context: 70.3
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
inferredLimousine Butte · antimonyTonnes: 70300000Grade: 0.12Grade Unit: %Contained Metal: 46000Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:27699d6b2d7ff3ac0389
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 70300000
- Grade
- 0.12
- Grade Unit
- %
- Contained Metal
- 46000
- Contained Unit
- t
- Cutoff Grade
- 0.45
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred antimony resource at a mid-range cut-off, showing grade sensitivity but with lower confidence.
Positive factors
- Significant antimony tonnage and contained metal at a mid-range cut-off
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.12%”
Context: 70.3
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
indicatedLimousine Butte · goldTonnes: 15200000Grade: 0.37Grade Unit: g/tContained Metal: 181400Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:fb323f5948950faa08f3
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 15200000
- Grade
- 0.37
- Grade Unit
- g/t
- Contained Metal
- 181400
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated gold resource at the base case cut-off, showing grade sensitivity.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.37”
Context: 15.2
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
indicatedLimousine Butte · silverTonnes: 15200000Grade: 1.15Grade Unit: g/tContained Metal: 562200Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:fb323f5948950faa08f3
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 15200000
- Grade
- 1.15
- Grade Unit
- g/t
- Contained Metal
- 562200
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated silver resource at the base case cut-off, showing grade sensitivity.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“1.15”
Context: 15.2
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
indicatedLimousine Butte · antimonyTonnes: 15200000Grade: 0.21Grade Unit: %Contained Metal: 31800Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:fb323f5948950faa08f3
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 15200000
- Grade
- 0.21
- Grade Unit
- %
- Contained Metal
- 31800
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated antimony resource at the base case cut-off, showing grade sensitivity.
Positive factors
- Indicated category provides reasonable confidence
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.21%”
Context: 15.2
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
inferredLimousine Butte · goldTonnes: 117500000Grade: 0.32Grade Unit: g/tContained Metal: 1203500Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:8f66c72ce00b71123bbc
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117500000
- Grade
- 0.32
- Grade Unit
- g/t
- Contained Metal
- 1203500
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred gold resource at the base case cut-off, showing grade sensitivity but with lower confidence.
Positive factors
- Large gold tonnage and contained metal at the base case cut-off
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.32”
Context: 117.5
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
inferredLimousine Butte · silverTonnes: 117500000Grade: 0.61Grade Unit: g/tContained Metal: 1694840Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:8f66c72ce00b71123bbc
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117500000
- Grade
- 0.61
- Grade Unit
- g/t
- Contained Metal
- 1694840
- Contained Unit
- oz
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred silver resource at the base case cut-off, showing grade sensitivity but with lower confidence.
Positive factors
- Large silver contained metal at the base case cut-off
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.61”
Context: 117.5
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
inferredLimousine Butte · antimonyTonnes: 117500000Grade: 0.09Grade Unit: %Contained Metal: 75700Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:8f66c72ce00b71123bbc
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 117500000
- Grade
- 0.09
- Grade Unit
- %
- Contained Metal
- 75700
- Contained Unit
- t
- Cutoff Grade
- 0.3
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Inferred antimony resource at the base case cut-off, showing grade sensitivity but with lower confidence.
Positive factors
- Large antimony tonnage and contained metal at the base case cut-off
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.09%”
Context: 117.5
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
indicatedLimousine Butte · goldTonnes: 23100000Grade: 0.28Grade Unit: g/tContained Metal: 204900Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:4a81874db6379a9f30fc
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 23100000
- Grade
- 0.28
- Grade Unit
- g/t
- Contained Metal
- 204900
- Contained Unit
- oz
- Cutoff Grade
- 0.15
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated gold resource at a lower cut-off, showing increased tonnage but lower grade.
Positive factors
- Increased tonnage at a lower cut-off
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.28”
Context: 23.1
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
indicatedLimousine Butte · silverTonnes: 23100000Grade: 0.98Grade Unit: g/tContained Metal: 729300Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:4a81874db6379a9f30fc
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 23100000
- Grade
- 0.98
- Grade Unit
- g/t
- Contained Metal
- 729300
- Contained Unit
- oz
- Cutoff Grade
- 0.15
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated silver resource at a lower cut-off, showing increased contained metal.
Positive factors
- Increased contained metal at a lower cut-off
- Indicated category provides reasonable confidence
- Part of the maiden MRE
Evidence · table
“0.98”
Context: 23.1
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
indicatedLimousine Butte · antimonyTonnes: 23100000Grade: 0.16Grade Unit: %Contained Metal: 36100Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:4a81874db6379a9f30fc
- Deposit or zone
- Measured & Indicated
- Mining method
- open_pit
Resource Data
- Category
- indicated
- Tonnes
- 23100000
- Grade
- 0.16
- Grade Unit
- %
- Contained Metal
- 36100
- Contained Unit
- t
- Cutoff Grade
- 0.15
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Measured and Indicated antimony resource at a lower cut-off, showing increased contained metal.
Positive factors
- Increased contained metal at a lower cut-off
- Indicated category provides reasonable confidence
- Part of the maiden MRE
- Antimony is a critical metal
Evidence · table
“0.16%”
Context: 23.1
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
inferredLimousine Butte · goldTonnes: 221900000Grade: 0.23Grade Unit: g/tContained Metal: 1628900Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- gold
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:d95fddfe86aefcd16937
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 221900000
- Grade
- 0.23
- Grade Unit
- g/t
- Contained Metal
- 1628900
- Contained Unit
- oz
- Cutoff Grade
- 0.15
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Very large inferred gold resource at a lower cut-off, showing significant tonnage but with lower confidence.
Positive factors
- Very large gold tonnage and contained metal at a lower cut-off
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.23”
Context: 221.9
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
inferredLimousine Butte · silverTonnes: 221900000Grade: 0.49Grade Unit: g/tContained Metal: 2997940Contained Unit: ozView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- silver
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:d95fddfe86aefcd16937
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 221900000
- Grade
- 0.49
- Grade Unit
- g/t
- Contained Metal
- 2997940
- Contained Unit
- oz
- Cutoff Grade
- 0.15
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Very large inferred silver resource at a lower cut-off, showing significant contained metal but with lower confidence.
Positive factors
- Very large silver contained metal at a lower cut-off
- Part of the maiden MRE
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.49”
Context: 221.9
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
inferredLimousine Butte · antimonyTonnes: 221900000Grade: 0.06Grade Unit: %Contained Metal: 114000Contained Unit: tView all detailsHide details
Identity
- Project
- Limousine Butte
- Commodity
- antimony
- Region
- usa_nv
- Reported Region
- Nevada
- Ticker
- NAU
Resource scope
- Estimate type
- resource
- Effective date
- 2026-07-15T00:00:00.000Z
- Reporting standards
- ni_43_101
- QP Signed
- Yes
- Qualified person names
- Gregory Z. Mosher, Daniel W. Kappes, Greg French
- Resource group id
- resource:d95fddfe86aefcd16937
- Deposit or zone
- Inferred
- Mining method
- open_pit
Resource Data
- Category
- inferred
- Tonnes
- 221900000
- Grade
- 0.06
- Grade Unit
- %
- Contained Metal
- 114000
- Contained Unit
- t
- Cutoff Grade
- 0.15
- Cutoff Unit
- g/t AuEq
Prior Estimate
- Resource Date
- 2026-07-15
Metal Equivalent
- Assumptions Disclosed
- Yes
Review
- Needs Review
- No
- Historical
- No
Dates
- Event date
- 2026-08-31T00:00:00.000Z
Reasoning: Very large inferred antimony resource at a lower cut-off, showing significant contained metal but with lower confidence.
Positive factors
- Very large antimony tonnage and contained metal at a lower cut-off
- Part of the maiden MRE
- Antimony is a critical metal
Negative factors
- Inferred category indicates lower confidence
Evidence · table
“0.06%”
Context: 221.9
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
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.