# Thunder Mountain Gold Launches 2026 Drill Program at South Mountain Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04 Original source: https://money.tmx.com/en/quote/THM/news/6942016809947109/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain Publisher: tmx Original announcement: 2026-06-22T13:30:00.000Z 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 - Primary commodity: Silver - Secondary commodities: Zinc, Copper, Lead, Gold - Document categories: Resource update, Other, Drill results - Extracted: 2026-09-15 02:46:03 UTC Narrative sentiment: 0.40 · Bullish ## Minestarters Atlas summary Thunder Mountain Gold has launched a 10,000-foot exploration drilling campaign at the South Mountain Project in Idaho to expand its existing CRD massive sulfide resource. The program targets geophysical anomalies and aims to test new copper-gold targets within the district. Reasoning: The announcement focuses on the launch of a new drill program, while restating an existing mineral resource estimate for context. - Positive factor: Launch of new 10,000-foot drill program - Positive factor: Established CRD massive sulfide resource - Positive factor: Strategic land acquisitions expanding footprint Facts used in scoring: 17 ## Classification and evidence **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: The release restates the South Mountain mineral resource estimate for context alongside the drill program announcement. Evidence · table > Table 1. South Mountain mineral resource estimate . ## Extracted facts Stored fact records: 17. Some facts used in scoring do not have a stored record. ## Drill Results (2) ### Fact 1 [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-drill-facts-0) gold Historical result Needs review: drill\_no\_hole\_id #### Identity - Commodity: gold - Region: usa\_id - Reported Region: usa\_id - Ticker: THM #### Geometry - Grade: 0.221 - Grade Unit: g/t - Intercept: 84 m #### Classification - Sample Type: drill #### QA/QC - QA/QC Methods: standards #### Review - Needs Review: Yes - Review Reason: drill\_no\_hole\_id - Interp. Status: scored - Historical: Yes - Historical Source Date: 2010-10-04T00:00:00.000Z #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Historical RC drill result restated from 2010. Evidence · text > 84 meters grading 0.221 g/t Au #### Tags used in scoring **No QA/QC Disclosure** Polarity: negative Definition: Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document. Why it applies: qaqc\_disclosed is not true **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **Stale Data Re-release** Polarity: negative Definition: Historical results re-announced with no new assays or reinterpretation — low genuine novelty. Why it applies: the fact restates a prior release **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The Company recently announced the purchase of 113 acres of private land contiguous with the main historic mine area." ### Fact 2 [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-drill-facts-1) gold Historical result Needs review: drill\_no\_hole\_id #### Identity - Commodity: gold - Region: usa\_id - Reported Region: usa\_id - Ticker: THM #### Geometry - Grade: 0.289 - Grade Unit: g/t - Intercept: 81 m #### Classification - Sample Type: drill #### QA/QC - QA/QC Methods: standards #### Review - Needs Review: Yes - Review Reason: drill\_no\_hole\_id - Interp. Status: scored - Historical: Yes - Historical Source Date: 2010-10-04T00:00:00.000Z #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Historical RC drill result restated from 2010. Evidence · text > 81 meters grading 0.289 g/t Au #### Tags used in scoring **No QA/QC Disclosure** Polarity: negative Definition: Release does not disclose QA/QC — lab certification, CP/QP sign-off and assay protocols cannot be checked from this document. Why it applies: qaqc\_disclosed is not true **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **Stale Data Re-release** Polarity: negative Definition: Historical results re-announced with no new assays or reinterpretation — low genuine novelty. Why it applies: the fact restates a prior release **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "The Company recently announced the purchase of 113 acres of private land contiguous with the main historic mine area." ## Resource Estimates (15) ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-2) South Mountain · silver #### Identity - Project: South Mountain - Commodity: silver - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:0bb85b8f1bc12c0afcb5 - Mining method: underground #### Resource Data - Category: measured - Tonnes: 69000 - Grade: 3.84 - Grade Unit: ounces/ ton #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Measured silver resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-3) South Mountain · gold #### Identity - Project: South Mountain - Commodity: gold - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:0bb85b8f1bc12c0afcb5 - Mining method: underground #### Resource Data - Category: measured - Tonnes: 69000 - Grade: 0.058 - Grade Unit: ounces/ ton #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Measured gold resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-4) South Mountain · zinc #### Identity - Project: South Mountain - Commodity: zinc - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:0bb85b8f1bc12c0afcb5 - Mining method: underground #### Resource Data - Category: measured - Tonnes: 69000 - Grade: 9.18 - Grade Unit: % #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Measured zinc resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-5) South Mountain · copper #### Identity - Project: South Mountain - Commodity: copper - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:0bb85b8f1bc12c0afcb5 - Mining method: underground #### Resource Data - Category: measured - Tonnes: 69000 - Grade: 0.6 - Grade Unit: % #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Measured copper resource component. Evidence · table > 0.6 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### measured [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-6) South Mountain · lead #### Identity - Project: South Mountain - Commodity: lead - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:0bb85b8f1bc12c0afcb5 - Mining method: underground #### Resource Data - Category: measured - Tonnes: 69000 - Grade: 0.67 - Grade Unit: % #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Measured lead resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-7) South Mountain · silver #### Identity - Project: South Mountain - Commodity: silver - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:c65873ade6f0418c9224 - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 154000 - Grade: 4.47 - Grade Unit: ounces/ ton #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Indicated silver resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-8) South Mountain · gold #### Identity - Project: South Mountain - Commodity: gold - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:c65873ade6f0418c9224 - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 154000 - Grade: 0.06 - Grade Unit: ounces/ ton #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Indicated gold resource component. Evidence · table > 0.06 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-9) South Mountain · zinc #### Identity - Project: South Mountain - Commodity: zinc - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:c65873ade6f0418c9224 - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 154000 - Grade: 8.95 - Grade Unit: % #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Indicated zinc resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-10) South Mountain · copper #### Identity - Project: South Mountain - Commodity: copper - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:c65873ade6f0418c9224 - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 154000 - Grade: 0.66 - Grade Unit: % #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Indicated copper resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-11) South Mountain · lead #### Identity - Project: South Mountain - Commodity: lead - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:c65873ade6f0418c9224 - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 154000 - Grade: 1.06 - Grade Unit: % #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Indicated lead resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-12) South Mountain · silver #### Identity - Project: South Mountain - Commodity: silver - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:499be0088010211455c4 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 959000 - Grade: 5.67 - Grade Unit: ounces/ ton #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Inferred silver resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-13) South Mountain · gold #### Identity - Project: South Mountain - Commodity: gold - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:499be0088010211455c4 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 959000 - Grade: 0.037 - Grade Unit: ounces/ ton #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Inferred gold resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-14) South Mountain · zinc #### Identity - Project: South Mountain - Commodity: zinc - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:499be0088010211455c4 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 959000 - Grade: 7.56 - Grade Unit: % #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Inferred zinc resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-15) South Mountain · copper #### Identity - Project: South Mountain - Commodity: copper - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:499be0088010211455c4 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 959000 - Grade: 0.8 - Grade Unit: % #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Inferred copper resource component. Evidence · table > 0.8 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/thunder-mountain-gold-launches-2026-drill-program-at-south-mountain--afffeb7e-2a77-4502-b2d0-19f67675ec04#fact-resource-facts-16) South Mountain · lead #### Identity - Project: South Mountain - Commodity: lead - Region: usa\_id - Reported Region: Idaho - Ticker: THM #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Steven A. Osterberg - Resource group id: resource:499be0088010211455c4 - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 959000 - Grade: 1.06 - Grade Unit: % #### Prior Estimate - Resource Date: 2023-12-31 #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-22T00:00:00.000Z Reasoning: Inferred lead resource component. 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 Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was 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 **No Contained Metal** Polarity: negative Definition: Tonnage and grade reported but contained metal not calculated or disclosed — incomplete reporting. Why it applies: contained\_metal was not reported **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 **Stale Estimate** Polarity: negative Definition: Effective date is >2 years old — data currency concern, may not reflect current geological understanding. Why it applies: effective date is 2.5 years before this release ## 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.