# Errington Metals Announces Maiden Mineral Resource Estimate for the Sudbury Basin Project Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569 Original source: https://orestocks.com/company/EM.V/press-releases/7778496740574468 Publisher: orestocks Original announcement: 2026-09-22T10:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-09-22T10:51:53.913Z Atlas analysis updated: 2026-09-22T10:51:53.913Z - Company: Errington Metals Corp. - Ticker: EM.V - Exchange: Unavailable - Region: Ontario - Primary commodity: Copper - Secondary commodities: Zinc, Lead, Gold, Silver - Document categories: Resource update - Extracted: 2026-09-22 10:51:54 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Errington Metals has announced a maiden Mineral Resource Estimate for its Sudbury Basin Project, reporting 14.20 Mt at 1.20% Cu, 4.02% Zn, 1.11% Pb, 0.83 g/t Au, and 50.25 g/t Ag in the Measured and Indicated categories, with an additional 3.44 Mt Inferred. Over 80% of the total resources are classified as Measured or Indicated, indicating high confidence in the estimate. The estimate is NI 43-101 compliant and signed off by a Qualified Person, with all deposits remaining open for expansion. Reasoning: Errington Metals announced a maiden Mineral Resource Estimate for its Sudbury Basin Project, establishing a strong foundation with over 80% of the total resources classified as Measured and Indicated, demonstrating high confidence and significant potential for expansion. - Positive factor: Maiden Mineral Resource Estimate - Positive factor: High Measured and Indicated percentage \(over 80%\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed off - Positive factor: Deposits remain open for expansion - Positive factor: Fully funded drill campaign ongoing Low confidence — this extraction should be reviewed alongside the original source. Facts used in scoring: 45 ## Classification and evidence **Maiden Resource** Polarity: neutral Definition: First formal MRE for the project — establishes baseline but typically exploration-stage with high Inferred component. Why it applies: The document explicitly states 'Errington Metals Announces Maiden Mineral Resource Estimate for the Sudbury Basin Project'. Evidence · text > Errington Metals Announces Maiden Mineral Resource Estimate for the Sudbury Basin 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 mineral resource estimate was prepared in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects. Evidence · text > The mineral resource estimate disclosed herein was prepared in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects \("NI 43-101"\). **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: The resource estimate was prepared by Ryan Wilson, Ph.D., P. Geo, of DRA Americas Incorporated, who is an independent qualified person \("QP"\) as defined by NI 43-101. Evidence · text > The resource estimate was prepared by Ryan Wilson, Ph.D., P. Geo, of DRA Americas Incorporated in accordance with NI 43-101. Mr.Wilson is an independent qualified person \("QP"\) as defined by NI 43-101. **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: The resource estimate includes a 'Measured' category for copper, zinc, lead, gold, and silver. Evidence · table > Measured Context: 7,652,664 **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 an 'Indicated' category for copper, zinc, lead, gold, and silver. Evidence · table > Indicated Context: 2,968,518 **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 an 'Inferred' category for copper, zinc, lead, gold, and silver. Evidence · table > Inferred Context: 804,289 **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: A break-even cut-off grade of 1.5% CuEq is explicitly stated for the resource estimate. Evidence · text > Stope shapes were developed using a break-even cut-off grade of 1.5% CuEq **Metal Equivalent Opaque** Polarity: positive Story-specific tag Definition: Metal equivalent grade reported without disclosing the price, recovery, or payability assumptions used. Why it applies: The CuEq formula and underlying metal prices and recoveries are explicitly disclosed in the footnotes. Evidence · text > CuEq% = 1 \* %Cu + 0.1804 \* %Zn + 0.0731 \* %Pb + 0.5321 \* g/t Au + 0.006124 \* g/t Ag. **QA/QC Disclosed** Polarity: positive Story-specific tag Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: The document includes a 'QA/QC Procedures' section detailing sampling, core-cutting, submission to assay labs, and verification via Certified Reference Material standards, blanks and field duplicates. Evidence · text > QA/QC Procedures Core samples are collected and handled using typical industry standards. Sampling, core-cutting and submission to the assay labs were conducted and supervised by Errington Metals personnel. Assay lab results have been verified by Errington Metals via Certified Reference Material standards, blanks and field duplicates. ## Extracted facts Stored fact records: 45. Some facts used in scoring do not have a stored record. ## Resource Estimates (45) ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-0) Sudbury Basin Project · copper #### Identity - Project: Sudbury Basin Project - Commodity: copper - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:0932a3f49dae8a8284e7 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: measured - Tonnes: 7652664 - Grade: 1.13 - Grade Unit: % - Contained Metal: 86175 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.54 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a significant Measured copper resource for the Errington deposit, forming a key part of the maiden MRE with good grade and high confidence. - Positive factor: Maiden MRE - Positive factor: Measured category \(highest confidence\) - Positive factor: Good copper grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 1.13 Context: 7,652,664 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-1) Sudbury Basin Project · zinc #### Identity - Project: Sudbury Basin Project - Commodity: zinc - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:0932a3f49dae8a8284e7 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: measured - Tonnes: 7652664 - Grade: 3.61 - Grade Unit: % - Contained Metal: 275910 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.54 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a significant Measured zinc resource for the Errington deposit, contributing to the maiden MRE with good grade and high confidence. - Positive factor: Maiden MRE - Positive factor: Measured category \(highest confidence\) - Positive factor: Good zinc grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 3.61 Context: 7,652,664 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-2) Sudbury Basin Project · lead #### Identity - Project: Sudbury Basin Project - Commodity: lead - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:0932a3f49dae8a8284e7 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: measured - Tonnes: 7652664 - Grade: 0.99 - Grade Unit: % - Contained Metal: 76089 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.54 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a Measured lead resource for the Errington deposit, contributing to the maiden MRE with high confidence. - Positive factor: Maiden MRE - Positive factor: Measured category \(highest confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 0.99 Context: 7,652,664 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-3) Sudbury Basin Project · gold #### Identity - Project: Sudbury Basin Project - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:0932a3f49dae8a8284e7 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: measured - Tonnes: 7652664 - Grade: 0.81 - Grade Unit: g/t - Contained Metal: 198143 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.54 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a Measured gold resource for the Errington deposit, contributing to the maiden MRE with high confidence. - Positive factor: Maiden MRE - Positive factor: Measured category \(highest confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 0.81 Context: 7,652,664 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-4) Sudbury Basin Project · silver #### Identity - Project: Sudbury Basin Project - Commodity: silver - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:0932a3f49dae8a8284e7 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: measured - Tonnes: 7652664 - Grade: 46.08 - Grade Unit: g/t - Contained Metal: 11337846 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.54 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a Measured silver resource for the Errington deposit, contributing to the maiden MRE with high confidence. - Positive factor: Maiden MRE - Positive factor: Measured category \(highest confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 46.08 Context: 7,652,664 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-5) Sudbury Basin Project · copper #### Identity - Project: Sudbury Basin Project - Commodity: copper - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:54a5adfc84269efae504 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 2968518 - Grade: 1.13 - Grade Unit: % - Contained Metal: 33572 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.79 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a significant Indicated copper resource for the Errington deposit, forming a key part of the maiden MRE with good grade and high confidence. - Positive factor: Maiden MRE - Positive factor: Indicated category \(good confidence\) - Positive factor: Good copper grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 1.13 Context: 2,968,518 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-6) Sudbury Basin Project · zinc #### Identity - Project: Sudbury Basin Project - Commodity: zinc - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:54a5adfc84269efae504 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 2968518 - Grade: 4.55 - Grade Unit: % - Contained Metal: 134936 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.79 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a significant Indicated zinc resource for the Errington deposit, contributing to the maiden MRE with good grade and high confidence. - Positive factor: Maiden MRE - Positive factor: Indicated category \(good confidence\) - Positive factor: Good zinc grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 4.55 Context: 2,968,518 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-7) Sudbury Basin Project · lead #### Identity - Project: Sudbury Basin Project - Commodity: lead - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:54a5adfc84269efae504 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 2968518 - Grade: 1.3 - Grade Unit: % - Contained Metal: 38475 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.79 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Indicated lead resource for the Errington deposit, contributing to the maiden MRE with good confidence. - Positive factor: Maiden MRE - Positive factor: Indicated category \(good confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 1.30 Context: 2,968,518 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-8) Sudbury Basin Project · gold #### Identity - Project: Sudbury Basin Project - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:54a5adfc84269efae504 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 2968518 - Grade: 0.81 - Grade Unit: g/t - Contained Metal: 77051 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.79 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Indicated gold resource for the Errington deposit, contributing to the maiden MRE with good confidence. - Positive factor: Maiden MRE - Positive factor: Indicated category \(good confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 0.81 Context: 2,968,518 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-9) Sudbury Basin Project · silver #### Identity - Project: Sudbury Basin Project - Commodity: silver - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:54a5adfc84269efae504 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 2968518 - Grade: 54.58 - Grade Unit: g/t - Contained Metal: 5209514 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.79 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Indicated silver resource for the Errington deposit, contributing to the maiden MRE with good confidence. - Positive factor: Maiden MRE - Positive factor: Indicated category \(good confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 54.58 Context: 2,968,518 #### 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 ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-10) Sudbury Basin Project · copper #### Identity - Project: Sudbury Basin Project - Commodity: copper - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:9dc32854b598ec67bb92 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: measured - Tonnes: 2000962 - Grade: 1.33 - Grade Unit: % - Contained Metal: 26621 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3.05 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a significant Measured copper resource for the Vermilion deposit, forming a key part of the maiden MRE with good grade and high confidence. - Positive factor: Maiden MRE - Positive factor: Measured category \(highest confidence\) - Positive factor: Good copper grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 1.33 Context: 2,000,962 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-11) Sudbury Basin Project · zinc #### Identity - Project: Sudbury Basin Project - Commodity: zinc - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:9dc32854b598ec67bb92 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: measured - Tonnes: 2000962 - Grade: 4.53 - Grade Unit: % - Contained Metal: 90724 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3.05 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a significant Measured zinc resource for the Vermilion deposit, contributing to the maiden MRE with good grade and high confidence. - Positive factor: Maiden MRE - Positive factor: Measured category \(highest confidence\) - Positive factor: Good zinc grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 4.53 Context: 2,000,962 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-12) Sudbury Basin Project · lead #### Identity - Project: Sudbury Basin Project - Commodity: lead - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:9dc32854b598ec67bb92 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: measured - Tonnes: 2000962 - Grade: 1.24 - Grade Unit: % - Contained Metal: 24804 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3.05 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a Measured lead resource for the Vermilion deposit, contributing to the maiden MRE with high confidence. - Positive factor: Maiden MRE - Positive factor: Measured category \(highest confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 1.24 Context: 2,000,962 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-13) Sudbury Basin Project · gold #### Identity - Project: Sudbury Basin Project - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:9dc32854b598ec67bb92 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: measured - Tonnes: 2000962 - Grade: 0.9 - Grade Unit: g/t - Contained Metal: 58087 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3.05 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a Measured gold resource for the Vermilion deposit, contributing to the maiden MRE with high confidence. - Positive factor: Maiden MRE - Positive factor: Measured category \(highest confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 0.90 Context: 2,000,962 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-14) Sudbury Basin Project · silver #### Identity - Project: Sudbury Basin Project - Commodity: silver - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:9dc32854b598ec67bb92 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: measured - Tonnes: 2000962 - Grade: 56.75 - Grade Unit: g/t - Contained Metal: 3650558 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3.05 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a Measured silver resource for the Vermilion deposit, contributing to the maiden MRE with high confidence. - Positive factor: Maiden MRE - Positive factor: Measured category \(highest confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 56.75 Context: 2,000,962 #### Tags used in scoring **Measured Resource** Polarity: positive Definition: Highest confidence category — tonnage, grade, shape well-established from closely-spaced drilling. Basis for Proven Reserves. Why it applies: category is "measured" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-15) Sudbury Basin Project · copper #### Identity - Project: Sudbury Basin Project - Commodity: copper - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:625859beae8d14e4bfe0 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 1582181 - Grade: 1.56 - Grade Unit: % - Contained Metal: 24665 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3.23 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a significant Indicated copper resource for the Vermilion deposit, forming a key part of the maiden MRE with strong grade and high confidence. - Positive factor: Maiden MRE - Positive factor: Indicated category \(good confidence\) - Positive factor: Strong copper grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 1.56 Context: 1,582,181 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-16) Sudbury Basin Project · zinc #### Identity - Project: Sudbury Basin Project - Commodity: zinc - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:625859beae8d14e4bfe0 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 1582181 - Grade: 4.4 - Grade Unit: % - Contained Metal: 69665 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3.23 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is a significant Indicated zinc resource for the Vermilion deposit, contributing to the maiden MRE with good grade and high confidence. - Positive factor: Maiden MRE - Positive factor: Indicated category \(good confidence\) - Positive factor: Good zinc grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 4.40 Context: 1,582,181 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-17) Sudbury Basin Project · lead #### Identity - Project: Sudbury Basin Project - Commodity: lead - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:625859beae8d14e4bfe0 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 1582181 - Grade: 1.11 - Grade Unit: % - Contained Metal: 17605 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3.23 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Indicated lead resource for the Vermilion deposit, contributing to the maiden MRE with good confidence. - Positive factor: Maiden MRE - Positive factor: Indicated category \(good confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 1.11 Context: 1,582,181 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-18) Sudbury Basin Project · gold #### Identity - Project: Sudbury Basin Project - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:625859beae8d14e4bfe0 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 1582181 - Grade: 0.91 - Grade Unit: g/t - Contained Metal: 46364 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3.23 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Indicated gold resource for the Vermilion deposit, contributing to the maiden MRE with good confidence. - Positive factor: Maiden MRE - Positive factor: Indicated category \(good confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 0.91 Context: 1,582,181 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-19) Sudbury Basin Project · silver #### Identity - Project: Sudbury Basin Project - Commodity: silver - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:625859beae8d14e4bfe0 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 1582181 - Grade: 54.05 - Grade Unit: g/t - Contained Metal: 2749567 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3.23 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Indicated silver resource for the Vermilion deposit, contributing to the maiden MRE with good confidence. - Positive factor: Maiden MRE - Positive factor: Indicated category \(good confidence\) - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 54.05 Context: 1,582,181 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-20) Sudbury Basin Project · copper #### Identity - Project: Sudbury Basin Project - Commodity: copper - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:2367eb5b62d68141e433 - Deposit or zone: Global M+I Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 14204325 - Grade: 1.2 - Grade Unit: % - Contained Metal: 171032 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.74 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This represents the total Measured and Indicated copper resource for the project, establishing a strong foundation with significant tonnage and good grade. - Positive factor: Maiden MRE - Positive factor: Significant M+I tonnage - Positive factor: Good copper grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 1.20 Context: 14,204,325 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-21) Sudbury Basin Project · zinc #### Identity - Project: Sudbury Basin Project - Commodity: zinc - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:2367eb5b62d68141e433 - Deposit or zone: Global M+I Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 14204325 - Grade: 4.02 - Grade Unit: % - Contained Metal: 571235 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.74 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This represents the total Measured and Indicated zinc resource for the project, establishing a strong foundation with significant tonnage and good grade. - Positive factor: Maiden MRE - Positive factor: Significant M+I tonnage - Positive factor: Good zinc grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 4.02 Context: 14,204,325 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-22) Sudbury Basin Project · lead #### Identity - Project: Sudbury Basin Project - Commodity: lead - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:2367eb5b62d68141e433 - Deposit or zone: Global M+I Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 14204325 - Grade: 1.11 - Grade Unit: % - Contained Metal: 156972 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.74 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This represents the total Measured and Indicated lead resource for the project, establishing a strong foundation with significant tonnage. - Positive factor: Maiden MRE - Positive factor: Significant M+I tonnage - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 1.11 Context: 14,204,325 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-23) Sudbury Basin Project · gold #### Identity - Project: Sudbury Basin Project - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:2367eb5b62d68141e433 - Deposit or zone: Global M+I Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 14204325 - Grade: 0.83 - Grade Unit: g/t - Contained Metal: 379644 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.74 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This represents the total Measured and Indicated gold resource for the project, establishing a strong foundation with significant tonnage. - Positive factor: Maiden MRE - Positive factor: Significant M+I tonnage - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 0.83 Context: 14,204,325 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-24) Sudbury Basin Project · silver #### Identity - Project: Sudbury Basin Project - Commodity: silver - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:2367eb5b62d68141e433 - Deposit or zone: Global M+I Total - Mining method: underground #### Resource Data - Category: indicated - Tonnes: 14204325 - Grade: 50.25 - Grade Unit: g/t - Contained Metal: 22947485 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.74 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This represents the total Measured and Indicated silver resource for the project, establishing a strong foundation with significant tonnage. - Positive factor: Maiden MRE - Positive factor: Significant M+I tonnage - Positive factor: NI 43-101 compliant - Positive factor: QP signed Evidence · table > 50.25 Context: 14,204,325 #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-25) Sudbury Basin Project · copper #### Identity - Project: Sudbury Basin Project - Commodity: copper - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:e629dc5ca4244098c207 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 804289 - Grade: 1.24 - Grade Unit: % - Contained Metal: 10011 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.81 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred copper resource for the Errington deposit, contributing to the maiden MRE with good grade but lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Good copper grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 1.24 Context: 804,289 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-26) Sudbury Basin Project · zinc #### Identity - Project: Sudbury Basin Project - Commodity: zinc - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:e629dc5ca4244098c207 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 804289 - Grade: 4.3 - Grade Unit: % - Contained Metal: 34614 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.81 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred zinc resource for the Errington deposit, contributing to the maiden MRE with good grade but lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Good zinc grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 4.30 Context: 804,289 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-27) Sudbury Basin Project · lead #### Identity - Project: Sudbury Basin Project - Commodity: lead - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:e629dc5ca4244098c207 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 804289 - Grade: 1.2 - Grade Unit: % - Contained Metal: 9646 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.81 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred lead resource for the Errington deposit, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 1.20 Context: 804,289 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-28) Sudbury Basin Project · gold #### Identity - Project: Sudbury Basin Project - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:e629dc5ca4244098c207 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 804289 - Grade: 0.79 - Grade Unit: g/t - Contained Metal: 20363 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.81 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred gold resource for the Errington deposit, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 0.79 Context: 804,289 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-29) Sudbury Basin Project · silver #### Identity - Project: Sudbury Basin Project - Commodity: silver - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:e629dc5ca4244098c207 - Deposit or zone: Errington - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 804289 - Grade: 51.79 - Grade Unit: g/t - Contained Metal: 1339190 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.81 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred silver resource for the Errington deposit, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 51.79 Context: 804,289 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-30) Sudbury Basin Project · copper #### Identity - Project: Sudbury Basin Project - Commodity: copper - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:2a6e02735f72ba7c8182 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 357339 - Grade: 1.11 - Grade Unit: % - Contained Metal: 3975 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred copper resource for the Vermilion deposit, contributing to the maiden MRE with good grade but lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Good copper grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 1.11 Context: 357,339 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-31) Sudbury Basin Project · zinc #### Identity - Project: Sudbury Basin Project - Commodity: zinc - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:2a6e02735f72ba7c8182 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 357339 - Grade: 4.92 - Grade Unit: % - Contained Metal: 17571 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred zinc resource for the Vermilion deposit, contributing to the maiden MRE with good grade but lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Good zinc grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 4.92 Context: 357,339 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-32) Sudbury Basin Project · lead #### Identity - Project: Sudbury Basin Project - Commodity: lead - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:2a6e02735f72ba7c8182 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 357339 - Grade: 1.24 - Grade Unit: % - Contained Metal: 4428 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred lead resource for the Vermilion deposit, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 1.24 Context: 357,339 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-33) Sudbury Basin Project · gold #### Identity - Project: Sudbury Basin Project - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:2a6e02735f72ba7c8182 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 357339 - Grade: 1.08 - Grade Unit: g/t - Contained Metal: 12400 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred gold resource for the Vermilion deposit, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 1.08 Context: 357,339 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-34) Sudbury Basin Project · silver #### Identity - Project: Sudbury Basin Project - Commodity: silver - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:2a6e02735f72ba7c8182 - Deposit or zone: Vermilion - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 357339 - Grade: 58.15 - Grade Unit: g/t - Contained Metal: 668051 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 3 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred silver resource for the Vermilion deposit, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 58.15 Context: 357,339 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-35) Sudbury Basin Project · copper #### Identity - Project: Sudbury Basin Project - Commodity: copper - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:52ab66ca93110b0fa6de - Deposit or zone: Balfour - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 2274831 - Grade: 0.93 - Grade Unit: % - Contained Metal: 21126 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.57 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred copper resource for the Balfour deposit, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 0.93 Context: 2,274,831 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-36) Sudbury Basin Project · zinc #### Identity - Project: Sudbury Basin Project - Commodity: zinc - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:52ab66ca93110b0fa6de - Deposit or zone: Balfour - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 2274831 - Grade: 4.68 - Grade Unit: % - Contained Metal: 106548 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.57 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred zinc resource for the Balfour deposit, contributing to the maiden MRE with good grade but lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Good zinc grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 4.68 Context: 2,274,831 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-37) Sudbury Basin Project · lead #### Identity - Project: Sudbury Basin Project - Commodity: lead - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:52ab66ca93110b0fa6de - Deposit or zone: Balfour - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 2274831 - Grade: 1.99 - Grade Unit: % - Contained Metal: 45207 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.57 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred lead resource for the Balfour deposit, contributing to the maiden MRE with good grade but lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 1.99 Context: 2,274,831 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-38) Sudbury Basin Project · gold #### Identity - Project: Sudbury Basin Project - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:52ab66ca93110b0fa6de - Deposit or zone: Balfour - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 2274831 - Grade: 0.41 - Grade Unit: g/t - Contained Metal: 29982 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.57 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred gold resource for the Balfour deposit, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 0.41 Context: 2,274,831 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-39) Sudbury Basin Project · silver #### Identity - Project: Sudbury Basin Project - Commodity: silver - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:52ab66ca93110b0fa6de - Deposit or zone: Balfour - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 2274831 - Grade: 73.08 - Grade Unit: g/t - Contained Metal: 5345239 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.57 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This is an Inferred silver resource for the Balfour deposit, contributing to the maiden MRE with good grade but lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Good silver grade for VMS deposit - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 73.08 Context: 2,274,831 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-40) Sudbury Basin Project · copper #### Identity - Project: Sudbury Basin Project - Commodity: copper - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:f6cb56b898f47e992d03 - Deposit or zone: Global Inferred Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 3436459 - Grade: 1.02 - Grade Unit: % - Contained Metal: 35113 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.67 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This represents the total Inferred copper resource for the project, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Significant Inferred tonnage - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 1.02 Context: 3,436,459 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-41) Sudbury Basin Project · zinc #### Identity - Project: Sudbury Basin Project - Commodity: zinc - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:f6cb56b898f47e992d03 - Deposit or zone: Global Inferred Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 3436459 - Grade: 4.62 - Grade Unit: % - Contained Metal: 158733 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.67 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This represents the total Inferred zinc resource for the project, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Significant Inferred tonnage - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 4.62 Context: 3,436,459 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-42) Sudbury Basin Project · lead #### Identity - Project: Sudbury Basin Project - Commodity: lead - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:f6cb56b898f47e992d03 - Deposit or zone: Global Inferred Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 3436459 - Grade: 1.73 - Grade Unit: % - Contained Metal: 59282 - Contained Unit: t - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.67 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This represents the total Inferred lead resource for the project, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Significant Inferred tonnage - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 1.73 Context: 3,436,459 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-43) Sudbury Basin Project · gold #### Identity - Project: Sudbury Basin Project - Commodity: gold - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:f6cb56b898f47e992d03 - Deposit or zone: Global Inferred Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 3436459 - Grade: 0.57 - Grade Unit: g/t - Contained Metal: 62745 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.67 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This represents the total Inferred gold resource for the project, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Significant Inferred tonnage - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 0.57 Context: 3,436,459 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/errington-metals-announces-maiden-mineral-resource-estimate-for-the-sudbury-basi--2733890c-42bc-4f85-a10d-ee98bca38569#fact-resource-facts-44) Sudbury Basin Project · silver #### Identity - Project: Sudbury Basin Project - Commodity: silver - Region: canada\_on - Reported Region: Ontario - Ticker: EM.V #### Resource scope - Estimate type: resource - Effective date: 2026-09-20T00:00:00.000Z - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: Ryan Wilson - Resource group id: resource:f6cb56b898f47e992d03 - Deposit or zone: Global Inferred Total - Mining method: underground #### Resource Data - Category: inferred - Tonnes: 3436459 - Grade: 66.55 - Grade Unit: g/t - Contained Metal: 7352480 - Contained Unit: oz - Cutoff Grade: 1.5 - Cutoff Unit: % CuEq #### Prior Estimate - Resource Date: 2026-09-20 #### Metal Equivalent - Metal Eq. Grade: 2.67 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Lab - Laboratory: ALS Canada, Activation Labs, MSALABS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: This represents the total Inferred silver resource for the project, contributing to the maiden MRE but with lower confidence due to its category. - Positive factor: Maiden MRE - Positive factor: Significant Inferred tonnage - Positive factor: NI 43-101 compliant - Positive factor: QP signed - Negative factor: Inferred category \(lower confidence\) Evidence · table > 66.55 Context: 3,436,459 #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Disclosed** Polarity: positive Definition: Cut-off grade used for resource reporting is clearly stated, enabling like-for-like comparison. Why it applies: cutoff\_grade is stated **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ## How Atlas produces this analysis Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.