# i-80 Gold Announces Additional High-Grade Assay Results From Archimedes Underground Including 16.2 g/t Au Over 56.4 Meters; Updates Timing of 2026 Technical Studies Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd Original source: https://orestocks.com/company/IAU.TO/press-releases/5068195335516787 Publisher: orestocks Original announcement: 2026-06-26T01:05:00.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-10-01T02:54:03.811Z Atlas analysis updated: 2026-10-01T02:54:03.811Z - Company: i-80 Gold Corp. - Ticker: IAU - Exchange: Unavailable - Region: Nevada - Primary commodity: Gold - Secondary commodities: Silver - Document categories: Drill results, Resource update - Extracted: 2026-10-01 02:54:04 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary i-80 Gold announced additional high-grade gold assay results from its Archimedes Underground Project, including 16.2 g/t Au over 56.4 meters. These infill drill results confirm significant widths and continuity of mineralization, supporting the project's development towards first gold in Q4 2026. The company also provided an updated mineral resource estimate for Archimedes and noted a delay in feasibility-level technical studies for its Granite Creek and Cove underground projects. Reasoning: The drill results confirm and extend high-grade gold mineralization at Archimedes, supporting the project's development timeline and resource update, despite the general nature of true width disclosure and minor delays in other studies. - Positive factor: High-grade gold intercepts with significant widths - Positive factor: Infill drilling confirms continuity and extends mineralization - Positive factor: Project development remains on schedule for first gold in Q4 2026 - Positive factor: Resource estimate updated with high confidence categories \(Indicated\) - Positive factor: Comprehensive QA/QC disclosure and QP sign-off - Negative factor: True width is estimated as a range rather than a precise value per intercept - Negative factor: Feasibility studies for other projects \(Granite Creek and Cove\) are delayed Low confidence — this extraction should be reviewed alongside the original source. Facts used in scoring: 46 ## Classification and evidence **Bonanza Intercept** Polarity: positive Definition: Exceptionally high-grade zone, well above the deposit-type norm. Why it applies: Hole iAU26-09 returned 16.2 g/t Au over 56.4 m, which is an exceptional grade-width product \(913.68 g/t·m\) for an underground gold deposit. Evidence · table > 16.2 Context: 56.4 **Bonanza Intercept** Polarity: positive Definition: Exceptionally high-grade zone, well above the deposit-type norm. Why it applies: Hole iAU26-11 returned 21.9 g/t Au over 20.2 m, which is an exceptional grade-width product \(442.38 g/t·m\) for an underground gold deposit. Evidence · table > 21.9 Context: 20.2 **True Width Disclosed** Polarity: positive Definition: Actual thickness perpendicular to structure is stated, not just downhole length. Why it applies: The document states that 'True widths are estimated between approximately 40%-65% of core width', providing an estimate for true width. Evidence · text > True widths are estimated between approximately 40%-65% of core width. **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: The release details that samples were submitted to MSALABS \(MSA\), an ISO9001 and ISO/IEC 17025 accredited laboratory, and that i-80 Gold's QA/QC program includes regular insertion of standards, duplicates, and blanks. Evidence · text > All samples were submitted to MSALABS \(MSA\) of Elko, NV, which is an ISO9001 and ISO/IEC 17025 accredited laboratory, independent of the Company. Samples submitted through MSA are crushed to 80% passing 2 mm and analyzed using CPA-Au1 \(Au; 500 gram photon assay\). MSA also undertakes their own internal coarse duplicate analysis to ensure proper sample preparation and equipment calibration. i-80 Gold's QA/QC program includes regular insertion of standards, duplicates, and blanks into the sample stream with a stringent review of all results. **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: The drill campaign is explicitly described as an 'infill drill campaign within the upper 426 zone' with a focus on 'further delineating the upper 426 zone to approximately 60-foot spacing'. Evidence · text > remaining assay results from the completed 2025-2026 infill drill campaign within the upper 426 zone of the Archimedes Underground Project **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 and technical studies are stated to be prepared in accordance with National Instrument 43-101. Evidence · text > prepared in accordance with National Instrument 43-101- Standards of Disclosure for Mineral Projects **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: The technical information has been reviewed and approved by Paul Chawrun P.Eng. and Tyler Hill CPG., who are qualified persons within the meaning of NI 43-101 and S-K 1300, and a QP from Practical Mining LLC reviewed the resource. Evidence · text > The technical information contained in this press release has been prepared under the supervision of, and has been reviewed and approved by Paul Chawrun P.Eng., Executive Vice President and Chief Operating Officer, and Tyler Hill CPG., Vice President Geology, for the Company, each of whom are qualified persons within the meaning of NI 43-101 and S-K 1300. ... A Qualified Person and employee of Practical Mining LLC, has reviewed the Ruby Hill Underground mineral resources and material assumptions included in the Ruby Hill Technical Report and confirmed that they remain current as of December 31, 2025. **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: The resource estimate includes a significant portion classified as Indicated Mineral Resources. Evidence · table > Indicated Mineral Resources Context: 426 **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: The resource estimate includes a significant portion classified as Inferred Mineral Resources. Evidence · table > Inferred Mineral Resources Context: 426 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: The document provides an updated mineral resource estimate for Archimedes as of December 31, 2025. Evidence · text > As of December 31, 2025, Archimedes hosts an Indicated Mineral Resource of 1.8 million tonnes containing 436,000 ounces of gold grading 7.6 grams per tonne and an Inferred Mineral Resource of 4.2 million tonnes containing 988,000 ounces of gold grading 7.3 grams per tonne\(1\). **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 cut-off grades for the resource estimate are explicitly stated as 5.06 and 5.48 Au g/t for the 426 and Ruby Deeps deposits respectively. Evidence · text > Pressure oxidation cutoff grades are 5.06 and 5.48 Au g/t \(0.148 and 0.160 opt\) for the 426 and Ruby Deeps deposits respectively. **Deleterious Elements Present** Polarity: negative Definition: Penalty elements \(arsenic, antimony, etc.\) or refractory concerns noted in the release. Why it applies: The resource estimate notes that 'Pressure oxidation gold metallurgical recoveries' are used, implying the presence of sulfide material that requires pressure oxidation, which can be a more complex and costly processing route. Evidence · text > Mineral resources have been estimated using pressure oxidation gold metallurgical recoveries of 96.8% and 89.5% for the 426 and Ruby Deeps deposits respectively. ## Extracted facts Stored fact records: 46. Some facts used in scoring do not have a stored record. ## Drill Results (34) ### iAU26-06 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-0) Archimedes Underground · gold #### Identity - Hole ID: iAU26-06 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 7.9 - Grade Unit: g/t - Intercept: 9.1 m - From: 107.6 m - To: 116.7 m - Intercept Depth: 107.6 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-06:107.6-116.7 - Mining Method: underground #### Location - Easting: 587367 - Northing: 4375865 - CRS: NAD83 Zone 11N - Elevation: 1774 m - Azimuth: 302 ° - Dip: -51 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: This intercept shows strong gold grades, confirming mineralization in an infill drilling program, contributing positively to resource confidence. - Positive factor: High-grade gold intercept \(7.9 g/t Au is strong for underground\) - Positive factor: Infill drilling confirms continuity - Negative factor: True width is estimated as a range Evidence · table > 7.9 Context: 9.1 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-06 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-1) Archimedes Underground · gold #### Identity - Hole ID: iAU26-06 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 6.8 - Grade Unit: g/t - Intercept: 3.8 m - From: 137.8 m - To: 141.7 m - Intercept Depth: 107.6 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-06:137.8-141.7 - Mining Method: underground #### Location - Easting: 587367 - Northing: 4375865 - CRS: NAD83 Zone 11N - Elevation: 1774 m - Azimuth: 302 ° - Dip: -51 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a narrow interval, contributing to the overall understanding of mineralization continuity. - Positive factor: Good gold grade \(6.8 g/t Au is strong for underground\) - Negative factor: Relatively narrow intercept length - Negative factor: True width is estimated as a range Evidence · table > 6.8 Context: 3.8 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-06 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-2) Archimedes Underground · gold #### Identity - Hole ID: iAU26-06 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 7.4 - Grade Unit: g/t - Intercept: 6.9 m - From: 157.2 m - To: 164.1 m - Intercept Depth: 107.6 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-06:157.2-164.1 - Mining Method: underground #### Location - Easting: 587367 - Northing: 4375865 - CRS: NAD83 Zone 11N - Elevation: 1774 m - Azimuth: 302 ° - Dip: -51 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a moderate interval, further supporting the continuity of mineralization. - Positive factor: Strong gold grade \(7.4 g/t Au is strong for underground\) - Negative factor: True width is estimated as a range Evidence · table > 7.4 Context: 6.9 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-07 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-3) Archimedes Underground · gold #### Identity - Hole ID: iAU26-07 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 16.1 - Grade Unit: g/t - Intercept: 17.6 m - From: 137.2 m - To: 154.8 m - Intercept Depth: 137.2 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-07:137.2-154.8 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 287 ° - Dip: -34 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: An exceptional high-grade gold intercept over a significant width, strongly supporting the project's economic potential and continuity. - Positive factor: Exceptional gold grade \(16.1 g/t Au is exceptional for underground\) - Positive factor: Significant intercept length \(17.6 m\) - Positive factor: High GT product \(283.36 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 16.1 Context: 17.6 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-07 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-4) Archimedes Underground · gold #### Identity - Hole ID: iAU26-07 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 2.4 - Grade Unit: g/t - Intercept: 19.8 m - From: 154.8 m - To: 174.5 m - Intercept Depth: 137.2 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-07:154.8-174.5 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 287 ° - Dip: -34 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A moderate intercept length with a weak gold grade, indicating some mineralization but below high-grade targets for underground mining. - Positive factor: Moderate intercept length \(19.8 m\) - Negative factor: Weak gold grade \(2.4 g/t Au is below weak for underground\) - Negative factor: True width is estimated as a range Evidence · table > 2.4 Context: 19.8 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-07 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-5) Archimedes Underground · gold #### Identity - Hole ID: iAU26-07 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 14 - Grade Unit: g/t - Intercept: 10.8 m - From: 185.6 m - To: 196.4 m - Intercept Depth: 137.2 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-07:185.6-196.4 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 287 ° - Dip: -34 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A high-grade gold intercept over a moderate width, adding to the positive results from this hole and confirming mineralization. - Positive factor: High-grade gold intercept \(14.0 g/t Au is strong for underground\) - Positive factor: Moderate intercept length \(10.8 m\) - Positive factor: High GT product \(151.2 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 14.0 Context: 10.8 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-08 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-6) Archimedes Underground · gold #### Identity - Hole ID: iAU26-08 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 7.3 - Grade Unit: g/t - Intercept: 33.1 m - From: 183.5 m - To: 216.6 m - Intercept Depth: 183.5 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-08:183.5-216.6 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1758 m - Azimuth: 5 ° - Dip: -48 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a significant width, indicating good continuity and potential for economic extraction in an underground setting. - Positive factor: Strong gold grade \(7.3 g/t Au is strong for underground\) - Positive factor: Significant intercept length \(33.1 m\) - Positive factor: High GT product \(241.63 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 7.3 Context: 33.1 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-08 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-7) Archimedes Underground · gold #### Identity - Hole ID: iAU26-08 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 9.8 - Grade Unit: g/t - Intercept: 4 m - From: 183.5 m - To: 187.5 m - Intercept Depth: 183.5 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-08:183.5-187.5 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1758 m - Azimuth: 5 ° - Dip: -48 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a narrow interval, contributing to the overall mineralization profile of the hole. - Positive factor: Strong gold grade \(9.8 g/t Au is strong for underground\) - Negative factor: Relatively narrow intercept length - Negative factor: True width is estimated as a range Evidence · table > 9.8 Context: 4.0 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-09 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-8) Archimedes Underground · gold #### Identity - Hole ID: iAU26-09 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 16.2 - Grade Unit: g/t - Intercept: 56.4 m - From: 145.9 m - To: 202.3 m - Intercept Depth: 145.9 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-09:145.9-202.3 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 281 ° - Dip: -31 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: This is an outstanding high-grade gold intercept over a very significant width, representing a bonanza result that strongly supports the project's economic viability and potential for expansion. - Positive factor: Exceptional gold grade \(16.2 g/t Au is exceptional for underground\) - Positive factor: Very significant intercept length \(56.4 m\) - Positive factor: Exceptional GT product \(913.68 g/t·m\) - Positive factor: Headline intercept for the release - Negative factor: True width is estimated as a range Evidence · table > 16.2 Context: 56.4 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-11 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-9) Archimedes Underground · gold #### Identity - Hole ID: iAU26-11 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 21.9 - Grade Unit: g/t - Intercept: 20.2 m - From: 181.4 m - To: 201.6 m - Intercept Depth: 181.4 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-11:181.4-201.6 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 276 ° - Dip: -31 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: An exceptional high-grade gold intercept over a significant width, representing a bonanza result that strongly supports the project's economic viability. - Positive factor: Exceptional gold grade \(21.9 g/t Au is exceptional for underground\) - Positive factor: Significant intercept length \(20.2 m\) - Positive factor: Exceptional GT product \(442.38 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 21.9 Context: 20.2 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-12 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-10) Archimedes Underground · gold #### Identity - Hole ID: iAU26-12 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 2.4 - Grade Unit: g/t - Intercept: 28.3 m - From: 107.4 m - To: 135.8 m - Intercept Depth: 107.4 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-12:107.4-135.8 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 355 ° - Dip: -55 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A moderate intercept length with a weak gold grade, indicating some mineralization but below high-grade targets for underground mining. - Positive factor: Moderate intercept length \(28.3 m\) - Negative factor: Weak gold grade \(2.4 g/t Au is below weak for underground\) - Negative factor: True width is estimated as a range Evidence · table > 2.4 Context: 28.3 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-12 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-11) Archimedes Underground · gold #### Identity - Hole ID: iAU26-12 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 5.2 - Grade Unit: g/t - Intercept: 5.7 m - From: 138.7 m - To: 144.4 m - Intercept Depth: 107.4 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-12:138.7-144.4 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 355 ° - Dip: -55 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A moderate gold grade over a narrow interval, contributing to the overall mineralization profile. - Positive factor: Moderate gold grade \(5.2 g/t Au is moderate for underground\) - Negative factor: Relatively narrow intercept length - Negative factor: True width is estimated as a range Evidence · table > 5.2 Context: 5.7 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-12 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-12) Archimedes Underground · gold #### Identity - Hole ID: iAU26-12 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 9 - Grade Unit: g/t - Intercept: 8.7 m - From: 167.8 m - To: 176.5 m - Intercept Depth: 107.4 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-12:167.8-176.5 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 355 ° - Dip: -55 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a moderate interval, further supporting the continuity of mineralization. - Positive factor: Strong gold grade \(9.0 g/t Au is strong for underground\) - Negative factor: True width is estimated as a range Evidence · table > 9.0 Context: 8.7 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-12 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-13) Archimedes Underground · gold #### Identity - Hole ID: iAU26-12 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 10.7 - Grade Unit: g/t - Intercept: 16.6 m - From: 190.1 m - To: 206.7 m - Intercept Depth: 107.4 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-12:190.1-206.7 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 355 ° - Dip: -55 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a significant width, indicating good continuity and potential for economic extraction in an underground setting. - Positive factor: Strong gold grade \(10.7 g/t Au is strong for underground\) - Positive factor: Significant intercept length \(16.6 m\) - Positive factor: High GT product \(177.62 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 10.7 Context: 16.6 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-13 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-14) Archimedes Underground · gold #### Identity - Hole ID: iAU26-13 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 2.2 - Grade Unit: g/t - Intercept: 5.2 m - From: 142.9 m - To: 148 m - Intercept Depth: 142.9 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-13:142.9-148 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 353 ° - Dip: -51 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A weak gold grade over a narrow interval, indicating some mineralization but not a high-priority target for underground mining. - Negative factor: Weak gold grade \(2.2 g/t Au is below weak for underground\) - Negative factor: Relatively narrow intercept length - Negative factor: True width is estimated as a range Evidence · table > 2.2 Context: 5.2 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-13 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-15) Archimedes Underground · gold #### Identity - Hole ID: iAU26-13 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 6.6 - Grade Unit: g/t - Intercept: 17.8 m - From: 169.7 m - To: 187.5 m - Intercept Depth: 142.9 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-13:169.7-187.5 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 353 ° - Dip: -51 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a moderate width, confirming mineralization in an infill drilling program. - Positive factor: Strong gold grade \(6.6 g/t Au is strong for underground\) - Positive factor: Moderate intercept length \(17.8 m\) - Negative factor: True width is estimated as a range Evidence · table > 6.6 Context: 17.8 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-13 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-16) Archimedes Underground · gold #### Identity - Hole ID: iAU26-13 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 11 - Grade Unit: g/t - Intercept: 26.1 m - From: 197.5 m - To: 223.6 m - Intercept Depth: 142.9 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-13:197.5-223.6 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 353 ° - Dip: -51 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a significant width, indicating good continuity and potential for economic extraction in an underground setting. - Positive factor: Strong gold grade \(11.0 g/t Au is strong for underground\) - Positive factor: Significant intercept length \(26.1 m\) - Positive factor: High GT product \(287.1 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 11.0 Context: 26.1 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-14 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-17) Archimedes Underground · gold #### Identity - Hole ID: iAU26-14 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 7 - Grade Unit: g/t - Intercept: 2.4 m - From: 127.7 m - To: 130.1 m - Intercept Depth: 127.7 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-14:127.7-130.1 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 349 ° - Dip: -62 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a very narrow interval, indicating localized high-grade mineralization. - Positive factor: Strong gold grade \(7.0 g/t Au is strong for underground\) - Negative factor: Very narrow intercept length - Negative factor: True width is estimated as a range Evidence · table > 7.0 Context: 2.4 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-15 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-18) Archimedes Underground · gold #### Identity - Hole ID: iAU26-15 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 3 - Grade Unit: g/t - Intercept: 8 m - From: 110.4 m - To: 118.4 m - Intercept Depth: 110.4 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-15:110.4-118.4 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 344 ° - Dip: -57 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A weak gold grade over a moderate interval, indicating some mineralization but not a high-priority target for underground mining. - Positive factor: Moderate intercept length \(8.0 m\) - Negative factor: Weak gold grade \(3.0 g/t Au is weak for underground\) - Negative factor: True width is estimated as a range Evidence · table > 3.0 Context: 8.0 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-15 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-19) Archimedes Underground · gold #### Identity - Hole ID: iAU26-15 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 11.1 - Grade Unit: g/t - Intercept: 3.1 m - From: 156.2 m - To: 159.2 m - Intercept Depth: 110.4 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-15:156.2-159.2 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 344 ° - Dip: -57 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a very narrow interval, indicating localized high-grade mineralization. - Positive factor: Strong gold grade \(11.1 g/t Au is strong for underground\) - Negative factor: Very narrow intercept length - Negative factor: True width is estimated as a range Evidence · table > 11.1 Context: 3.1 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-15 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-20) Archimedes Underground · gold #### Identity - Hole ID: iAU26-15 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 8 - Grade Unit: g/t - Intercept: 22.4 m - From: 171 m - To: 193.4 m - Intercept Depth: 110.4 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-15:171-193.4 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 344 ° - Dip: -57 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a significant width, indicating good continuity and potential for economic extraction in an underground setting. - Positive factor: Strong gold grade \(8.0 g/t Au is strong for underground\) - Positive factor: Significant intercept length \(22.4 m\) - Positive factor: High GT product \(179.2 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 8.0 Context: 22.4 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-16 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-21) Archimedes Underground · gold #### Identity - Hole ID: iAU26-16 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 7.8 - Grade Unit: g/t - Intercept: 5.2 m - From: 151.7 m - To: 156.9 m - Intercept Depth: 151.7 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-16:151.7-156.9 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 338 ° - Dip: -63 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a narrow interval, contributing to the overall mineralization profile. - Positive factor: Strong gold grade \(7.8 g/t Au is strong for underground\) - Negative factor: Relatively narrow intercept length - Negative factor: True width is estimated as a range Evidence · table > 7.8 Context: 5.2 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-17 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-22) Archimedes Underground · gold #### Identity - Hole ID: iAU26-17 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 5.4 - Grade Unit: g/t - Intercept: 56.5 m - From: 93.8 m - To: 150.3 m - Intercept Depth: 93.8 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-17:93.8-150.3 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 333 ° - Dip: -56 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A moderate gold grade over a very significant width, indicating a substantial mineralized zone that could be economically viable. - Positive factor: Moderate gold grade \(5.4 g/t Au is moderate for underground\) - Positive factor: Very significant intercept length \(56.5 m\) - Positive factor: Exceptional GT product \(305.1 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 5.4 Context: 56.5 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-17 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-23) Archimedes Underground · gold #### Identity - Hole ID: iAU26-17 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 15 - Grade Unit: g/t - Intercept: 8.8 m - From: 154.8 m - To: 163.6 m - Intercept Depth: 93.8 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-17:154.8-163.6 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 333 ° - Dip: -56 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: An exceptional high-grade gold intercept over a moderate width, indicating a high-value zone within the broader mineralization. - Positive factor: Exceptional gold grade \(15.0 g/t Au is exceptional for underground\) - Positive factor: Moderate intercept length \(8.8 m\) - Positive factor: High GT product \(132 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 15.0 Context: 8.8 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-17 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-24) Archimedes Underground · gold #### Identity - Hole ID: iAU26-17 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 3.2 - Grade Unit: g/t - Intercept: 30.8 m - From: 163.6 m - To: 194.5 m - Intercept Depth: 93.8 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-17:163.6-194.5 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 333 ° - Dip: -56 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A weak gold grade over a significant width, indicating a broad zone of lower-grade mineralization. - Positive factor: Significant intercept length \(30.8 m\) - Negative factor: Weak gold grade \(3.2 g/t Au is weak for underground\) - Negative factor: True width is estimated as a range Evidence · table > 3.2 Context: 30.8 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-18 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-25) Archimedes Underground · gold #### Identity - Hole ID: iAU26-18 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 6.9 - Grade Unit: g/t - Intercept: 7.7 m - From: 144.5 m - To: 152.2 m - Intercept Depth: 144.5 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-18:144.5-152.2 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 327 ° - Dip: -66 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a moderate interval, confirming mineralization in an infill drilling program. - Positive factor: Strong gold grade \(6.9 g/t Au is strong for underground\) - Negative factor: True width is estimated as a range Evidence · table > 6.9 Context: 7.7 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-19 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-26) Archimedes Underground · gold #### Identity - Hole ID: iAU26-19 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 7.9 - Grade Unit: g/t - Intercept: 3.5 m - From: 136.2 m - To: 139.8 m - Intercept Depth: 136.2 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-19:136.2-139.8 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 320 ° - Dip: -54 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a narrow interval, indicating localized high-grade mineralization. - Positive factor: Strong gold grade \(7.9 g/t Au is strong for underground\) - Negative factor: Relatively narrow intercept length - Negative factor: True width is estimated as a range Evidence · table > 7.9 Context: 3.5 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-19 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-27) Archimedes Underground · gold #### Identity - Hole ID: iAU26-19 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 4.5 - Grade Unit: g/t - Intercept: 23.7 m - From: 160.8 m - To: 184.5 m - Intercept Depth: 136.2 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-19:160.8-184.5 - Mining Method: underground #### Location - Easting: 587415 - Northing: 4375965 - CRS: NAD83 Zone 11N - Elevation: 1759 m - Azimuth: 320 ° - Dip: -54 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A moderate gold grade over a significant width, indicating a broad zone of mineralization. - Positive factor: Moderate gold grade \(4.5 g/t Au is moderate for underground\) - Positive factor: Significant intercept length \(23.7 m\) - Negative factor: True width is estimated as a range Evidence · table > 4.5 Context: 23.7 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-22 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-28) Archimedes Underground · gold #### Identity - Hole ID: iAU26-22 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 8.1 - Grade Unit: g/t - Intercept: 21.6 m - From: 119.9 m - To: 141.5 m - Intercept Depth: 119.9 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-22:119.9-141.5 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 311 ° - Dip: -42 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a significant width, indicating good continuity and potential for economic extraction in an underground setting. - Positive factor: Strong gold grade \(8.1 g/t Au is strong for underground\) - Positive factor: Significant intercept length \(21.6 m\) - Positive factor: High GT product \(174.96 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 8.1 Context: 21.6 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-22 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-29) Archimedes Underground · gold #### Identity - Hole ID: iAU26-22 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 2.2 - Grade Unit: g/t - Intercept: 14.7 m - From: 141.5 m - To: 156.2 m - Intercept Depth: 119.9 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-22:141.5-156.2 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 311 ° - Dip: -42 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A weak gold grade over a moderate interval, indicating some mineralization but not a high-priority target for underground mining. - Negative factor: Weak gold grade \(2.2 g/t Au is below weak for underground\) - Negative factor: True width is estimated as a range Evidence · table > 2.2 Context: 14.7 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-22 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-30) Archimedes Underground · gold #### Identity - Hole ID: iAU26-22 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 10.4 - Grade Unit: g/t - Intercept: 4.8 m - From: 171.2 m - To: 175.9 m - Intercept Depth: 119.9 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-22:171.2-175.9 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 311 ° - Dip: -42 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a narrow interval, indicating localized high-grade mineralization. - Positive factor: Strong gold grade \(10.4 g/t Au is strong for underground\) - Negative factor: Relatively narrow intercept length - Negative factor: True width is estimated as a range Evidence · table > 10.4 Context: 4.8 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-23 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-31) Archimedes Underground · gold #### Identity - Hole ID: iAU26-23 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 15.8 - Grade Unit: g/t - Intercept: 6.7 m - From: 123 m - To: 129.8 m - Intercept Depth: 123 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-23:123-129.8 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 322 ° - Dip: -43 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: An exceptional high-grade gold intercept over a moderate width, indicating a high-value zone within the mineralization. - Positive factor: Exceptional gold grade \(15.8 g/t Au is exceptional for underground\) - Positive factor: Moderate intercept length \(6.7 m\) - Positive factor: High GT product \(105.86 g/t·m\) - Negative factor: True width is estimated as a range Evidence · table > 15.8 Context: 6.7 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-23 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-32) Archimedes Underground · gold #### Identity - Hole ID: iAU26-23 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 2.8 - Grade Unit: g/t - Intercept: 15.5 m - From: 153.3 m - To: 168.7 m - Intercept Depth: 123 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-23:153.3-168.7 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 322 ° - Dip: -43 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A weak gold grade over a moderate interval, indicating some mineralization but not a high-priority target for underground mining. - Positive factor: Moderate intercept length \(15.5 m\) - Negative factor: Weak gold grade \(2.8 g/t Au is weak for underground\) - Negative factor: True width is estimated as a range Evidence · table > 2.8 Context: 15.5 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ### iAU26-25 [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-drill-facts-33) Archimedes Underground · gold #### Identity - Hole ID: iAU26-25 - Project: Archimedes Underground - Commodity: gold - Region: usa\_nv - Reported Region: usa\_nv - Ticker: IAU #### Geometry - Grade: 11.9 - Grade Unit: g/t - Intercept: 1.8 m - From: 187.5 m - To: 189.3 m - Intercept Depth: 187.5 m #### Classification - Deposit Type: orogenic - Program: infill - Sample Type: drill - Group ID: iAU26-25:187.5-189.3 - Mining Method: underground #### Location - Easting: 587354 - Northing: 4375817 - CRS: NAD83 Zone 11N - Elevation: 1779 m - Azimuth: 270 ° - Dip: -36 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: MSALABS \(MSA\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong gold grade over a very narrow interval, indicating localized high-grade mineralization. - Positive factor: Strong gold grade \(11.9 g/t Au is strong for underground\) - Negative factor: Very narrow intercept length - Negative factor: True width is estimated as a range Evidence · table > 11.9 Context: 1.8 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is 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 ## Resource Estimates (12) ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-34) Archimedes Underground Project · gold #### Identity - Project: Archimedes Underground Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:3e869afc0017d75f52e8 - Deposit or zone: 426 - Mining method: combined #### Resource Data - Category: indicated - Tonnes: 899000 - Grade: 6.9 - Grade Unit: g/t - Contained Metal: 199 - Contained Unit: koz - Cutoff Grade: 5.06 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong indicated gold resource for the 426 zone, providing good confidence for mine planning and development. - Positive factor: High-grade gold resource \(6.9 g/t Au is strong for underground\) - Positive factor: Indicated category provides good confidence - Positive factor: QP/CP signed and compliant with NI 43-101 and S-K 1300 Evidence · table > 6.9 Context: 899 #### 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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-35) Archimedes Underground Project · silver #### Identity - Project: Archimedes Underground Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:3e869afc0017d75f52e8 - Deposit or zone: 426 - Mining method: combined #### Resource Data - Category: indicated - Tonnes: 899000 - Grade: 0.8 - Grade Unit: g/t - Contained Metal: 22 - Contained Unit: koz - Cutoff Grade: 5.06 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A very low-grade silver component in the indicated resource, likely a byproduct with minimal economic impact. - Negative factor: Very low silver grade \(0.8 g/t Ag is below weak for silver\) - Negative factor: Low contained silver Evidence · table > 0.8 Context: 899 #### 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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-36) Archimedes Underground Project · gold #### Identity - Project: Archimedes Underground Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:5b355af35ea0923fd1ea - Deposit or zone: Ruby Deeps - Mining method: combined #### Resource Data - Category: indicated - Tonnes: 892000 - Grade: 8.3 - Grade Unit: g/t - Contained Metal: 237 - Contained Unit: koz - Cutoff Grade: 5.48 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong indicated gold resource for the Ruby Deeps zone, providing good confidence for mine planning and development. - Positive factor: High-grade gold resource \(8.3 g/t Au is strong for underground\) - Positive factor: Indicated category provides good confidence - Positive factor: QP/CP signed and compliant with NI 43-101 and S-K 1300 Evidence · table > 8.3 Context: 892 #### 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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-37) Archimedes Underground Project · silver #### Identity - Project: Archimedes Underground Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:5b355af35ea0923fd1ea - Deposit or zone: Ruby Deeps - Mining method: combined #### Resource Data - Category: indicated - Tonnes: 892000 - Grade: 2.4 - Grade Unit: g/t - Contained Metal: 69 - Contained Unit: koz - Cutoff Grade: 5.48 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A low-grade silver component in the indicated resource, likely a byproduct with minor economic impact. - Negative factor: Low silver grade \(2.4 g/t Ag is below weak for silver\) Evidence · table > 2.4 Context: 892 #### 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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-38) Archimedes Underground Project · gold #### Identity - Project: Archimedes Underground Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:c273c32cbf01c4fd2c53 - Deposit or zone: Total Indicated - Mining method: combined #### Resource Data - Category: indicated - Tonnes: 1791000 - Grade: 7.6 - Grade Unit: g/t - Contained Metal: 436000 - Contained Unit: oz #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A significant total indicated gold resource for Archimedes, providing a strong foundation for economic studies and mine development. - Positive factor: High-grade gold resource \(7.6 g/t Au is strong for underground\) - Positive factor: Indicated category provides good confidence - Positive factor: QP/CP signed and compliant with NI 43-101 and S-K 1300 Evidence · table > 7.6 Context: 1,791 #### 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 **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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-39) Archimedes Underground Project · silver #### Identity - Project: Archimedes Underground Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:c273c32cbf01c4fd2c53 - Deposit or zone: Total Indicated - Mining method: combined #### Resource Data - Category: indicated - Tonnes: 1791000 - Grade: 1.6 - Grade Unit: g/t - Contained Metal: 92 - Contained Unit: koz #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A very low-grade silver component in the total indicated resource, likely a byproduct with minimal economic impact. - Negative factor: Very low silver grade \(1.6 g/t Ag is below weak for silver\) - Negative factor: Low contained silver Evidence · table > 1.6 Context: 1,791 #### 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 **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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-40) Archimedes Underground Project · gold #### Identity - Project: Archimedes Underground Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:ebc93741185d618d099c - Deposit or zone: 426 - Mining method: combined #### Resource Data - Category: inferred - Tonnes: 1038000 - Grade: 6.6 - Grade Unit: g/t - Contained Metal: 219 - Contained Unit: koz - Cutoff Grade: 5.06 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A strong inferred gold resource for the 426 zone, indicating potential for future conversion to higher confidence categories with further drilling. - Positive factor: High-grade gold resource \(6.6 g/t Au is strong for underground\) - Positive factor: QP/CP signed and compliant with NI 43-101 and S-K 1300 - Negative factor: Inferred category has lower geological confidence Evidence · table > 6.6 Context: 1,038 #### 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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-41) Archimedes Underground Project · silver #### Identity - Project: Archimedes Underground Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:ebc93741185d618d099c - Deposit or zone: 426 - Mining method: combined #### Resource Data - Category: inferred - Tonnes: 1038000 - Grade: 1.2 - Grade Unit: g/t - Contained Metal: 40 - Contained Unit: koz - Cutoff Grade: 5.06 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A very low-grade silver component in the inferred resource, likely a byproduct with minimal economic impact and lower confidence. - Negative factor: Very low silver grade \(1.2 g/t Ag is below weak for silver\) - Negative factor: Low contained silver - Negative factor: Inferred category has lower geological confidence Evidence · table > 1.2 Context: 1,038 #### 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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-42) Archimedes Underground Project · gold #### Identity - Project: Archimedes Underground Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:85f6218ab04d82d93afd - Deposit or zone: Ruby Deeps - Mining method: combined #### Resource Data - Category: inferred - Tonnes: 3150000 - Grade: 7.6 - Grade Unit: g/t - Contained Metal: 769 - Contained Unit: koz - Cutoff Grade: 5.48 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A large, high-grade inferred gold resource for the Ruby Deeps zone, representing significant exploration potential for future conversion. - Positive factor: High-grade gold resource \(7.6 g/t Au is strong for underground\) - Positive factor: Significant tonnage in inferred category - Positive factor: QP/CP signed and compliant with NI 43-101 and S-K 1300 - Negative factor: Inferred category has lower geological confidence Evidence · table > 7.6 Context: 3,150 #### 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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-43) Archimedes Underground Project · silver #### Identity - Project: Archimedes Underground Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:85f6218ab04d82d93afd - Deposit or zone: Ruby Deeps - Mining method: combined #### Resource Data - Category: inferred - Tonnes: 3150000 - Grade: 2.4 - Grade Unit: g/t - Contained Metal: 246 - Contained Unit: koz - Cutoff Grade: 5.48 - Cutoff Unit: g/t Au #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A low-grade silver component in the inferred resource, likely a byproduct with minor economic impact and lower confidence. - Negative factor: Low silver grade \(2.4 g/t Ag is below weak for silver\) - Negative factor: Inferred category has lower geological confidence Evidence · table > 2.4 Context: 3,150 #### 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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-44) Archimedes Underground Project · gold #### Identity - Project: Archimedes Underground Project - Commodity: gold - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:ee5697f76fd20a205fc5 - Deposit or zone: Total Inferred - Mining method: combined #### Resource Data - Category: inferred - Tonnes: 4188000 - Grade: 7.3 - Grade Unit: g/t - Contained Metal: 988000 - Contained Unit: oz #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A substantial total inferred gold resource for Archimedes, indicating significant future potential but requiring further drilling to upgrade confidence. - Positive factor: High-grade gold resource \(7.3 g/t Au is strong for underground\) - Positive factor: Significant total inferred tonnage - Positive factor: QP/CP signed and compliant with NI 43-101 and S-K 1300 - Negative factor: Inferred category has lower geological confidence Evidence · table > 7.3 Context: 4,188 #### 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 **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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/i-80-gold-announces-additional-high-grade-assay-results-from-archimedes-undergro--d15cfb9f-883a-4cbd-9c5e-9cfae2a956bd#fact-resource-facts-45) Archimedes Underground Project · silver #### Identity - Project: Archimedes Underground Project - Commodity: silver - Region: usa\_nv - Reported Region: Nevada - Ticker: IAU #### Resource scope - Estimate type: resource - Effective date: 2024-12-31T00:00:00.000Z - Reporting standards: ni\_43\_101, sec\_sk1300 - QP Signed: Yes - Qualified person names: Paul Chawrun P.Eng., Tyler Hill CPG., Practical Mining LLC - Resource group id: resource:ee5697f76fd20a205fc5 - Deposit or zone: Total Inferred - Mining method: combined #### Resource Data - Category: inferred - Tonnes: 4188000 - Grade: 2.1 - Grade Unit: g/t - Contained Metal: 286 - Contained Unit: koz #### Prior Estimate - Resource Date: 2025-12-31 #### Metal Equivalent - Assumptions Disclosed: Yes #### Location - Loc. Confidence: inferred #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-06-26T00:00:00.000Z Reasoning: A low-grade silver component in the total inferred resource, likely a byproduct with minimal economic impact and lower confidence. - Negative factor: Low silver grade \(2.1 g/t Ag is below weak for silver\) - Negative factor: Inferred category has lower geological confidence Evidence · table > 2.1 Context: 4,188 #### 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 **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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ## 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.