# Thunder Mountain Gold, Inc. Updated 43-101 Mineral Resource Estimate at South Mountain Shows Significant Increase Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269 Original source: https://money.tmx.com/en/quote/THM/news/7475487017530621/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun Publisher: tmx Original announcement: 2023-12-21T14:01:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Thunder Mountain Gold, Inc. - Ticker: THM - Exchange: TSX - Region: Idaho, U.S.A. - Primary commodity: Zinc - Secondary commodities: Silver, Gold, Copper, Lead - Document categories: Resource update - Extracted: 2026-09-15 03:10:37 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Thunder Mountain Gold, Inc. announced an updated NI 43-101 Mineral Resource Estimate for its South Mountain Project in Idaho, effective October 16, 2023. The estimate reports a 7.7% increase in Measured & Indicated tonnage and a 15.1% increase in Inferred tonnage, with significant growth in contained zinc, silver, gold, and copper. The DMEA Zone was extended by 250 feet down-dip and remains open, confirming the project's continued high-grade mineralization. Reasoning: The updated NI 43-101 Mineral Resource Estimate for the South Mountain Project shows substantial growth in both Measured & Indicated and Inferred categories across multiple high-value commodities, maintaining high grades and extending a key mineralized zone, all prepared to a high reporting standard. - Positive factor: Significant increase in Measured & Indicated tonnage \(7.7%\) and Inferred tonnage \(15.1%\) - Positive factor: Significant increase in contained zinc, silver, gold, and copper - Positive factor: High-grade mineralization maintained - Positive factor: DMEA Zone extended by 250 feet and remains open - Positive factor: NI 43-101 compliant estimate by independent firm - Positive factor: Qualified Person \(QP\) sign-off - Positive factor: Detailed disclosure of metal equivalent assumptions and cut-off grade Low confidence — this extraction should be reviewed alongside the original source. Facts used in scoring: 45 ## Classification and evidence **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The resource estimate was prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects \("NI-43-101"\). Evidence · text > prepared in accordance with National Instrument 43-101 Standards of Disclosure for Mineral Projects \("NI-43-101"\) **QP/CP Signed** Polarity: positive Definition: 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: Mr. Richard A. Schwering, SME-RM, P.G., of Hard Rock Consulting, LLC. is the QP for the estimate and is responsible for the South Mountain Project Mineral Resource Estimate. Evidence · text > The QP for the estimate Mr. Richard A. Schwering, SME-RM, P.G., of Hard Rock Consulting, LLC. is independent of South Mountain Mining, LLC. **Tonnage Growth** Polarity: positive Definition: Tonnage increase reaching the strong tier vs prior estimate, with grade maintained or improved. Why it applies: The Measured & Indicated tonnage increased by 7.7% and the Inferred tonnage increased by 15.1% from the previous 2021 MRE. Evidence · text > 7.7% increase to the Measured & Indicated tonnage... 15.1% increase in the Inferred tonnage **Contained Metal Growth** Polarity: positive Definition: True scale improvement — contained metal ounces/tonnes increased vs prior, accounting for both tonnage and grade changes. Why it applies: The update includes a significant increase in contained zinc, silver, gold, and copper, with specific increases of 14% in Inferred zinc and silver pounds. Evidence · text > significant increase in zinc, silver, gold, and copper. 15.1% increase in the Inferred tonnage, including a 14% increase in zinc and silver. **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: The mineral resource is reported at an underground mining cut-off of $97.50 U.S. Net Smelter Return \("NSR"\). Evidence · text > The mineral resource is reported at an underground mining cut-off of $97.50 U.S. Net Smelter Return \("NSR"\) **Underground Mining** Polarity: neutral Story-specific tag Definition: No canonical definition is currently available. Why it applies: The resource is reported at an underground mining cut-off of $97.50 U.S. Net Smelter Return \("NSR"\). Evidence · text > The mineral resource is reported at an underground mining cut-off of $97.50 U.S. Net Smelter Return \("NSR"\) **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: The document is titled "Updated 43-101 Mineral Resource Estimate" and describes a newly filed MRE incorporating recent drilling results. Evidence · text > Updated 43-101 Mineral Resource Estimate at South Mountain Shows Significant Increase **Multi-Domain Tested** Polarity: positive Story-specific tag Definition: Variability across ore domains \(oxide, transition, fresh\) has been addressed. Why it applies: The resource estimate provides details for two distinct metallurgical domains: Massive Sulfide Type and Skarn Type. Evidence · table > Massive Sulfide Type Context: Metallurgical Domain Classification ## Extracted facts Stored fact records: 45. Some facts used in scoring do not have a stored record. ## Resource Estimates (45) ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-0) South Mountain Project · zinc #### Identity - Project: South Mountain Project - Commodity: zinc - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:0080e8210acd07813441 - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: measured - Tonnes: 48988 - Grade: 11.51 - Grade Unit: % - Contained Metal: 12300000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: High-grade zinc in the Measured category for the Massive Sulfide domain contributes to the overall resource increase and confidence. - Positive factor: High-grade zinc in Measured category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 11.51 Context: 54,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-1) South Mountain Project · silver #### Identity - Project: South Mountain Project - Commodity: silver - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:0080e8210acd07813441 - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: measured - Tonnes: 48988 - Grade: 3.62 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 194000 - Contained Unit: t. oz - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Good silver grade in the Measured category for the Massive Sulfide domain adds to the project's polymetallic value. - Positive factor: Significant silver grade in Measured category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 3.62 Context: 54,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-2) South Mountain Project · gold #### Identity - Project: South Mountain Project - Commodity: gold - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:0080e8210acd07813441 - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: measured - Tonnes: 48988 - Grade: 0.07 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 3800 - Contained Unit: t. oz - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Gold grade in the Measured category for the Massive Sulfide domain adds to the polymetallic nature of the resource. - Positive factor: Gold contribution in Measured category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.070 Context: 54,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-3) South Mountain Project · copper #### Identity - Project: South Mountain Project - Commodity: copper - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:0080e8210acd07813441 - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: measured - Tonnes: 48988 - Grade: 0.45 - Grade Unit: % - Contained Metal: 500000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Copper grade in the Measured category for the Massive Sulfide domain enhances the polymetallic value of the resource. - Positive factor: Copper contribution in Measured category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.45 Context: 54,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-4) South Mountain Project · lead #### Identity - Project: South Mountain Project - Commodity: lead - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:0080e8210acd07813441 - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: measured - Tonnes: 48988 - Grade: 0.79 - Grade Unit: % - Contained Metal: 850000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Lead grade in the Measured category for the Massive Sulfide domain adds to the polymetallic nature of the resource. - Positive factor: Lead contribution in Measured category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.79 Context: 54,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-5) South Mountain Project · zinc #### Identity - Project: South Mountain Project - Commodity: zinc - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:7c1ad4054b4566a3098f - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 110656 - Grade: 11.15 - Grade Unit: % - Contained Metal: 27300000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: High-grade zinc in the Indicated category for the Massive Sulfide domain contributes significantly to the overall resource. - Positive factor: High-grade zinc in Indicated category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 11.15 Context: 122,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-6) South Mountain Project · silver #### Identity - Project: South Mountain Project - Commodity: silver - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:7c1ad4054b4566a3098f - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 110656 - Grade: 4.74 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 580000 - Contained Unit: t. oz - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Good silver grade in the Indicated category for the Massive Sulfide domain adds to the project's polymetallic value. - Positive factor: Significant silver grade in Indicated category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 4.74 Context: 122,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-7) South Mountain Project · gold #### Identity - Project: South Mountain Project - Commodity: gold - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:7c1ad4054b4566a3098f - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 110656 - Grade: 0.074 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 9100 - Contained Unit: t. oz - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Gold grade in the Indicated category for the Massive Sulfide domain adds to the polymetallic nature of the resource. - Positive factor: Gold contribution in Indicated category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.074 Context: 122,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-8) South Mountain Project · copper #### Identity - Project: South Mountain Project - Commodity: copper - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:7c1ad4054b4566a3098f - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 110656 - Grade: 0.55 - Grade Unit: % - Contained Metal: 1300000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Copper grade in the Indicated category for the Massive Sulfide domain enhances the polymetallic value of the resource. - Positive factor: Copper contribution in Indicated category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.55 Context: 122,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-9) South Mountain Project · lead #### Identity - Project: South Mountain Project - Commodity: lead - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:7c1ad4054b4566a3098f - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 110656 - Grade: 1.32 - Grade Unit: % - Contained Metal: 3240000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Lead grade in the Indicated category for the Massive Sulfide domain adds to the polymetallic nature of the resource. - Positive factor: Lead contribution in Indicated category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 1.32 Context: 122,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-10) South Mountain Project · zinc #### Identity - Project: South Mountain Project - Commodity: zinc - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:a0605ac6a3482751e154 - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 787400 - Grade: 8.25 - Grade Unit: % - Contained Metal: 143200000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Significant zinc tonnage in the Inferred category for the Massive Sulfide domain provides substantial future potential. - Positive factor: Large tonnage of zinc in Inferred category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 8.25 Context: 868,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-11) South Mountain Project · silver #### Identity - Project: South Mountain Project - Commodity: silver - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:a0605ac6a3482751e154 - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 787400 - Grade: 5.96 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 5177000 - Contained Unit: t. oz - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: High silver grade and substantial contained metal in the Inferred category for the Massive Sulfide domain adds significant future value. - Positive factor: Significant silver grade and contained metal in Inferred category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 5.96 Context: 868,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-12) South Mountain Project · gold #### Identity - Project: South Mountain Project - Commodity: gold - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:a0605ac6a3482751e154 - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 787400 - Grade: 0.04 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 34700 - Contained Unit: t. oz - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Gold grade in the Inferred category for the Massive Sulfide domain adds to the polymetallic nature of the resource. - Positive factor: Gold contribution in Inferred category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.040 Context: 868,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-13) South Mountain Project · copper #### Identity - Project: South Mountain Project - Commodity: copper - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:a0605ac6a3482751e154 - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 787400 - Grade: 0.74 - Grade Unit: % - Contained Metal: 12800000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Copper grade in the Inferred category for the Massive Sulfide domain enhances the polymetallic value of the resource. - Positive factor: Copper contribution in Inferred category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.74 Context: 868,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-14) South Mountain Project · lead #### Identity - Project: South Mountain Project - Commodity: lead - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:a0605ac6a3482751e154 - Deposit or zone: Massive Sulfide Type - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 787400 - Grade: 1.16 - Grade Unit: % - Contained Metal: 20200000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Lead grade in the Inferred category for the Massive Sulfide domain adds to the polymetallic nature of the resource. - Positive factor: Lead contribution in Inferred category - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 1.16 Context: 868,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-15) South Mountain Project · zinc #### Identity - Project: South Mountain Project - Commodity: zinc - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:42119126325f8705f785 - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: measured - Tonnes: 13608 - Grade: 0.99 - Grade Unit: % - Contained Metal: 300000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Zinc grade in the Measured category for the Skarn domain contributes to the overall resource. - Positive factor: Zinc contribution in Measured category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.99 Context: 15,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-16) South Mountain Project · silver #### Identity - Project: South Mountain Project - Commodity: silver - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:42119126325f8705f785 - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: measured - Tonnes: 13608 - Grade: 4.61 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 70000 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Silver grade in the Measured category for the Skarn domain adds to the polymetallic value. - Positive factor: Good silver grade in Measured category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 4.61 Context: 15,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-17) South Mountain Project · gold #### Identity - Project: South Mountain Project - Commodity: gold - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:42119126325f8705f785 - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: measured - Tonnes: 13608 - Grade: 0.017 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 300 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Gold grade in the Measured category for the Skarn domain adds to the polymetallic nature of the resource. - Positive factor: Gold contribution in Measured category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.017 Context: 15,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-18) South Mountain Project · copper #### Identity - Project: South Mountain Project - Commodity: copper - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:42119126325f8705f785 - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: measured - Tonnes: 13608 - Grade: 1.12 - Grade Unit: % - Contained Metal: 300000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Copper grade in the Measured category for the Skarn domain enhances the polymetallic value of the resource. - Positive factor: Good copper grade in Measured category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 1.12 Context: 15,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-19) South Mountain Project · lead #### Identity - Project: South Mountain Project - Commodity: lead - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:42119126325f8705f785 - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: measured - Tonnes: 13608 - Grade: 0.27 - Grade Unit: % - Contained Metal: 80000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Lead grade in the Measured category for the Skarn domain adds to the polymetallic nature of the resource. - Positive factor: Lead contribution in Measured category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.27 Context: 15,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-20) South Mountain Project · zinc #### Identity - Project: South Mountain Project - Commodity: zinc - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:f73b5a504520723abd9f - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 29030 - Grade: 0.44 - Grade Unit: % - Contained Metal: 300000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Zinc grade in the Indicated category for the Skarn domain contributes to the overall resource. - Positive factor: Zinc contribution in Indicated category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.44 Context: 32,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-21) South Mountain Project · silver #### Identity - Project: South Mountain Project - Commodity: silver - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:f73b5a504520723abd9f - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 29030 - Grade: 3.44 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 109000 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Silver grade in the Indicated category for the Skarn domain adds to the polymetallic value. - Positive factor: Good silver grade in Indicated category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 3.44 Context: 32,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-22) South Mountain Project · gold #### Identity - Project: South Mountain Project - Commodity: gold - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:f73b5a504520723abd9f - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 29030 - Grade: 0.005 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 100 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Gold grade in the Indicated category for the Skarn domain adds to the polymetallic nature of the resource. - Positive factor: Gold contribution in Indicated category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.005 Context: 32,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-23) South Mountain Project · copper #### Identity - Project: South Mountain Project - Commodity: copper - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:f73b5a504520723abd9f - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 29030 - Grade: 1.12 - Grade Unit: % - Contained Metal: 700000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Copper grade in the Indicated category for the Skarn domain enhances the polymetallic value of the resource. - Positive factor: Good copper grade in Indicated category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 1.12 Context: 32,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-24) South Mountain Project · lead #### Identity - Project: South Mountain Project - Commodity: lead - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:f73b5a504520723abd9f - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 29030 - Grade: 0.07 - Grade Unit: % - Contained Metal: 40000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Lead grade in the Indicated category for the Skarn domain adds to the polymetallic nature of the resource. - Positive factor: Lead contribution in Indicated category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.07 Context: 32,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-25) South Mountain Project · zinc #### Identity - Project: South Mountain Project - Commodity: zinc - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:22accf84e2fa7883b4e8 - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 82550 - Grade: 1.02 - Grade Unit: % - Contained Metal: 1900000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Zinc grade in the Inferred category for the Skarn domain contributes to the overall resource potential. - Positive factor: Zinc contribution in Inferred category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 1.02 Context: 91,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-26) South Mountain Project · silver #### Identity - Project: South Mountain Project - Commodity: silver - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:22accf84e2fa7883b4e8 - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 82550 - Grade: 2.86 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 261000 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Silver grade in the Inferred category for the Skarn domain adds to the polymetallic value. - Positive factor: Silver contribution in Inferred category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 2.86 Context: 91,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-27) South Mountain Project · gold #### Identity - Project: South Mountain Project - Commodity: gold - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:22accf84e2fa7883b4e8 - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 82550 - Grade: 0.005 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 400 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Gold grade in the Inferred category for the Skarn domain adds to the polymetallic nature of the resource. - Positive factor: Gold contribution in Inferred category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.005 Context: 91,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-28) South Mountain Project · copper #### Identity - Project: South Mountain Project - Commodity: copper - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:22accf84e2fa7883b4e8 - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 82550 - Grade: 1.41 - Grade Unit: % - Contained Metal: 2600000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Copper grade in the Inferred category for the Skarn domain enhances the polymetallic value of the resource. - Positive factor: Good copper grade in Inferred category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 1.41 Context: 91,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-29) South Mountain Project · lead #### Identity - Project: South Mountain Project - Commodity: lead - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:22accf84e2fa7883b4e8 - Deposit or zone: Skarn Type - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 82550 - Grade: 0.04 - Grade Unit: % - Contained Metal: 70000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Lead grade in the Inferred category for the Skarn domain adds to the polymetallic nature of the resource. - Positive factor: Lead contribution in Inferred category for Skarn domain - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.04 Context: 91,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-30) South Mountain Project · zinc #### Identity - Project: South Mountain Project - Commodity: zinc - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:6bf68db341f5b6ee9daa - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: measured - Tonnes: 62595 - Grade: 9.18 - Grade Unit: % - Contained Metal: 12600000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: High-grade zinc in the Measured category for the total resource contributes significantly to the project's value. - Positive factor: High-grade zinc in Measured category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 9.18 Context: 69,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-31) South Mountain Project · silver #### Identity - Project: South Mountain Project - Commodity: silver - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:6bf68db341f5b6ee9daa - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: measured - Tonnes: 62595 - Grade: 3.84 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 264000 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Good silver grade in the Measured category for the total resource adds to the project's polymetallic value. - Positive factor: Significant silver grade in Measured category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 3.84 Context: 69,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-32) South Mountain Project · gold #### Identity - Project: South Mountain Project - Commodity: gold - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:6bf68db341f5b6ee9daa - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: measured - Tonnes: 62595 - Grade: 0.058 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 4000 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Gold grade in the Measured category for the total resource adds to the polymetallic nature of the project. - Positive factor: Gold contribution in Measured category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.058 Context: 69,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-33) South Mountain Project · copper #### Identity - Project: South Mountain Project - Commodity: copper - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:6bf68db341f5b6ee9daa - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: measured - Tonnes: 62595 - Grade: 0.6 - Grade Unit: % - Contained Metal: 800000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Copper grade in the Measured category for the total resource enhances the polymetallic value of the project. - Positive factor: Copper contribution in Measured category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.60 Context: 69,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-34) South Mountain Project · lead #### Identity - Project: South Mountain Project - Commodity: lead - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:6bf68db341f5b6ee9daa - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: measured - Tonnes: 62595 - Grade: 0.67 - Grade Unit: % - Contained Metal: 930000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Lead grade in the Measured category for the total resource adds to the polymetallic nature of the project. - Positive factor: Lead contribution in Measured category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.67 Context: 69,000 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-35) South Mountain Project · zinc #### Identity - Project: South Mountain Project - Commodity: zinc - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:995732994e3d9aaefb16 - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 139659 - Grade: 8.95 - Grade Unit: % - Contained Metal: 27600000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: High-grade zinc in the Indicated category for the total resource contributes significantly to the project's value. - Positive factor: High-grade zinc in Indicated category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 8.95 Context: 154,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-36) South Mountain Project · silver #### Identity - Project: South Mountain Project - Commodity: silver - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:995732994e3d9aaefb16 - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 139659 - Grade: 4.47 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 688000 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Good silver grade in the Indicated category for the total resource adds to the project's polymetallic value. - Positive factor: Significant silver grade in Indicated category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 4.47 Context: 154,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-37) South Mountain Project · gold #### Identity - Project: South Mountain Project - Commodity: gold - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:995732994e3d9aaefb16 - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 139659 - Grade: 0.06 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 9300 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Gold grade in the Indicated category for the total resource adds to the polymetallic nature of the project. - Positive factor: Gold contribution in Indicated category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.060 Context: 154,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-38) South Mountain Project · copper #### Identity - Project: South Mountain Project - Commodity: copper - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:995732994e3d9aaefb16 - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 139659 - Grade: 0.66 - Grade Unit: % - Contained Metal: 2000000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Copper grade in the Indicated category for the total resource enhances the polymetallic value of the project. - Positive factor: Copper contribution in Indicated category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.66 Context: 154,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-39) South Mountain Project · lead #### Identity - Project: South Mountain Project - Commodity: lead - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:995732994e3d9aaefb16 - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 139659 - Grade: 1.06 - Grade Unit: % - Contained Metal: 3280000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Lead grade in the Indicated category for the total resource adds to the polymetallic nature of the project. - Positive factor: Lead contribution in Indicated category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 1.06 Context: 154,000 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-40) South Mountain Project · zinc #### Identity - Project: South Mountain Project - Commodity: zinc - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:e4815047bbf4b1ef356f - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 869900 - Grade: 7.56 - Grade Unit: % - Contained Metal: 145000000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Significant zinc tonnage in the Inferred category for the total resource provides substantial future potential. - Positive factor: Large tonnage of zinc in Inferred category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 7.56 Context: 959,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-41) South Mountain Project · silver #### Identity - Project: South Mountain Project - Commodity: silver - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:e4815047bbf4b1ef356f - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 869900 - Grade: 5.67 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 5438000 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: High silver grade and substantial contained metal in the Inferred category for the total resource adds significant future value. - Positive factor: Significant silver grade and contained metal in Inferred category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 5.67 Context: 959,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-42) South Mountain Project · gold #### Identity - Project: South Mountain Project - Commodity: gold - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:e4815047bbf4b1ef356f - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 869900 - Grade: 0.037 - Grade Unit: t. oz/ sh. Ton - Contained Metal: 35200 - Contained Unit: oz/ sh. ton - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Gold grade in the Inferred category for the total resource adds to the polymetallic nature of the project. - Positive factor: Gold contribution in Inferred category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.037 Context: 959,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-43) South Mountain Project · copper #### Identity - Project: South Mountain Project - Commodity: copper - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:e4815047bbf4b1ef356f - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 869900 - Grade: 0.8 - Grade Unit: % - Contained Metal: 15400000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Copper grade in the Inferred category for the total resource enhances the polymetallic value of the project. - Positive factor: Copper contribution in Inferred category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 0.80 Context: 959,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-inc-updated-43-101-mineral-resource-estimate-at-south-moun--6f9eb40e-782a-40ea-a699-50d4ad868269#fact-resource-facts-44) South Mountain Project · lead #### Identity - Project: South Mountain Project - Commodity: lead - Region: usa\_id - Reported Region: Idaho, U.S.A. - Ticker: THM #### Resource scope - Estimate type: resource - Effective date: 2023-10-16T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Richard A. Schwering - Resource group id: resource:e4815047bbf4b1ef356f - Deposit or zone: Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 869900 - Grade: 1.06 - Grade Unit: % - Contained Metal: 20270000 - Contained Unit: lb. - Cutoff Grade: 97.5 - Cutoff Unit: USD/ton NSR #### Prior Estimate - Resource Date: 2023-10-16 #### Metal Equivalent - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Global #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-12-21T00:00:00.000Z Reasoning: Lead grade in the Inferred category for the total resource adds to the polymetallic nature of the project. - Positive factor: Lead contribution in Inferred category \(Total\) - Positive factor: Part of an updated NI 43-101 compliant resource Evidence · table > 1.06 Context: 959,000 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: 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 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ## How Atlas produces this analysis Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.