# GR Silver's 2027 Resource Update Decides What Its Zinc Is Worth Canonical Atlas analysis: https://atlas-extractions.minestarters.com/news/gr-silver-s-2027-resource-update-decides-what-its-zinc-is-worth--a06b92f8-6de2-4e63-8250-dfd202caf3d0 Original source: https://www.cruxinvestor.com/posts/gr-silvers-2027-resource-update-decides-what-its-zinc-is-worth Publisher: cruxinvestor Original announcement: 2026-09-18T00:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: GR Silver Mining Ltd. - Ticker: GRSL - Exchange: Unavailable - Region: Mexico - Primary commodity: Silver - Secondary commodities: Zinc, Lead, Gold, Copper - Document categories: Drill results, Resource update - Extracted: 2026-09-19 00:02:27 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary GR Silver reported significant step-out drill results at the San Marcial project in Mexico, extending the mineralized breccia system 300m southeast and 75m deeper than the 2023 resource boundary. The drilling confirmed polymetallic continuity, with high-grade silver intercepts also returning notable zinc and lead grades. Reasoning: Significant step-out drill results extend the known mineralized footprint of the San Marcial silver discovery, confirming polymetallic \(Ag-Zn-Pb\) continuity. - Positive factor: Step-out drilling extends mineralization 300m southeast and 75m deeper than 2023 resource - Positive factor: High-grade silver-zinc-lead intercepts confirmed in step-out zones - Positive factor: System remains open at depth with consistent grades - Negative factor: Project is still early-stage with no economic study or reserves Facts used in scoring: 7 ## Classification and evidence **Step-Out Extension** Polarity: positive Definition: Mineralization extended beyond the previously known limit. Why it applies: Drill results push mineralized breccias 300m southeast and 75m deeper than the 2023 resource edge. Evidence · text > They push the mineralized breccias at least 300 m southeast and 75 m deeper than the edge of the company's 2023 resource **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: The 2023 resource includes 14 Moz of silver in the inferred category. Evidence · text > 46 million ounces \(Moz\) of silver in the indicated category and 14 Moz in the inferred category **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: The project is described as a silver discovery within the Plomosas Project package. Evidence · text > San Marcial is the silver discovery inside that package ## Extracted facts Stored fact records: 7. Some facts used in scoring do not have a stored record. ## Drill Results (5) ### Fact 1 [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-s-2027-resource-update-decides-what-its-zinc-is-worth--a06b92f8-6de2-4e63-8250-dfd202caf3d0#fact-drill-facts-0) San Marcial · silver Needs review: drill\_no\_hole\_id #### Identity - Project: San Marcial - Commodity: silver - Region: mexico - Reported Region: mexico - Ticker: GRSL #### Geometry - Grade: 162 - Grade Unit: g/t - Intercept: 16.1 m - True Width: 16.1 m - From: 375.05 m - To: 391.15 m - Intercept Depth: 375.05 m #### Classification - Deposit Type: epithermal - Program: exploration - Sample Type: drill - Group ID: null:375.05-null - Mining Method: unknown #### Location - Location: San Marcial - Loc. Source: document #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: drill\_no\_hole\_id - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-18T00:00:00.000Z Reasoning: Strong silver intercept in a step-out location. - Positive factor: High grade silver intercept in step-out zone Evidence · text > 16.1 meters \(m\) true width at 162 grams per metric ton \(g/t\) silver from 375.05 m depth #### Tags used in scoring **True Width Disclosed** Polarity: positive Definition: Actual thickness perpendicular to structure is stated, not just downhole length. Why it applies: true\_width\_m is 16.1 **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated ### Fact 2 [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-s-2027-resource-update-decides-what-its-zinc-is-worth--a06b92f8-6de2-4e63-8250-dfd202caf3d0#fact-drill-facts-1) San Marcial · lead Needs review: drill\_no\_hole\_id #### Identity - Project: San Marcial - Commodity: lead - Region: mexico - Reported Region: mexico - Ticker: GRSL #### Geometry - Grade: 0.1 - Grade Unit: % - Intercept: 16.1 m - True Width: 16.1 m - From: 375.05 m - To: 391.15 m - Intercept Depth: 375.05 m #### Classification - Deposit Type: epithermal - Program: exploration - Sample Type: drill - Group ID: null:375.05-null - Mining Method: unknown #### Location - Location: San Marcial - Loc. Source: document #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: drill\_no\_hole\_id - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-18T00:00:00.000Z Reasoning: Trace lead reported in the same interval as high-grade silver. Evidence · text > the 16.1 m true-width interval at 162 g/t silver returned 0.1% lead #### Tags used in scoring **True Width Disclosed** Polarity: positive Definition: Actual thickness perpendicular to structure is stated, not just downhole length. Why it applies: true\_width\_m is 16.1 **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated ### Fact 3 [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-s-2027-resource-update-decides-what-its-zinc-is-worth--a06b92f8-6de2-4e63-8250-dfd202caf3d0#fact-drill-facts-2) San Marcial · zinc Needs review: drill\_no\_hole\_id #### Identity - Project: San Marcial - Commodity: zinc - Region: mexico - Reported Region: mexico - Ticker: GRSL #### Geometry - Grade: 0.3 - Grade Unit: % - Intercept: 16.1 m - True Width: 16.1 m - From: 375.05 m - To: 391.15 m - Intercept Depth: 375.05 m #### Classification - Deposit Type: epithermal - Program: exploration - Sample Type: drill - Group ID: null:375.05-null - Mining Method: unknown #### Location - Location: San Marcial - Loc. Source: document #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: drill\_no\_hole\_id - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-18T00:00:00.000Z Reasoning: Trace zinc reported in the same interval as high-grade silver. Evidence · text > the 16.1 m true-width interval at 162 g/t silver returned ... 0.3% zinc #### Tags used in scoring **True Width Disclosed** Polarity: positive Definition: Actual thickness perpendicular to structure is stated, not just downhole length. Why it applies: true\_width\_m is 16.1 **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated ### Fact 4 [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-s-2027-resource-update-decides-what-its-zinc-is-worth--a06b92f8-6de2-4e63-8250-dfd202caf3d0#fact-drill-facts-3) San Marcial · silver Needs review: drill\_no\_hole\_id #### Identity - Project: San Marcial - Commodity: silver - Region: mexico - Reported Region: mexico - Ticker: GRSL #### Geometry - Grade: 147 - Grade Unit: g/t - Intercept: 11.7 m - True Width: 11.7 m - From: 275.55 m - To: 287.25 m - Intercept Depth: 275.55 m #### Classification - Deposit Type: epithermal - Program: exploration - Sample Type: drill - Group ID: null:275.55-null - Mining Method: unknown #### Location - Location: San Marcial - Loc. Source: document #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: drill\_no\_hole\_id - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-18T00:00:00.000Z Reasoning: Strong silver intercept in a step-out location. - Positive factor: High grade silver intercept in step-out zone Evidence · text > 11.7 m true width at 147 g/t silver from 275.55 m depth #### Tags used in scoring **True Width Disclosed** Polarity: positive Definition: Actual thickness perpendicular to structure is stated, not just downhole length. Why it applies: true\_width\_m is 11.7 **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated ### Fact 5 [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-s-2027-resource-update-decides-what-its-zinc-is-worth--a06b92f8-6de2-4e63-8250-dfd202caf3d0#fact-drill-facts-4) San Marcial · zinc Needs review: drill\_no\_hole\_id #### Identity - Project: San Marcial - Commodity: zinc - Region: mexico - Reported Region: mexico - Ticker: GRSL #### Geometry - Grade: 5.8 - Grade Unit: % - Intercept: 4.15 m - True Width: 4.15 m #### Classification - Deposit Type: epithermal - Program: exploration - Sample Type: drill - Group ID: null:null-null - Mining Method: unknown #### Location - Location: San Marcial - Loc. Source: document #### QA/QC - QA/QC Disclosed: Yes - QA/QC Methods: standards, duplicates #### Review - Needs Review: Yes - Review Reason: drill\_no\_hole\_id - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-18T00:00:00.000Z Reasoning: Exceptional zinc grade reported in the 2026 program. - Positive factor: Richest zinc grade of the 2026 program Evidence · text > 5.8% over 4.15 meters \(m\) true width, reported on July 10, 2026 #### Tags used in scoring **True Width Disclosed** Polarity: positive Definition: Actual thickness perpendicular to structure is stated, not just downhole length. Why it applies: true\_width\_m is 4.15 **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated ## Resource Estimates (2) ### indicated [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-s-2027-resource-update-decides-what-its-zinc-is-worth--a06b92f8-6de2-4e63-8250-dfd202caf3d0#fact-resource-facts-5) San Marcial · silver #### Identity - Project: San Marcial - Commodity: silver - Region: mexico - Reported Region: Mexico - Ticker: GRSL #### Resource scope - Estimate type: resource - Resource group id: resource:a10c50ab074720e6bccc - Mining method: underground #### Resource Data - Category: indicated - Contained Metal: 46000000 - Contained Unit: moz #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-18T00:00:00.000Z Reasoning: Existing indicated resource component of the 2023 estimate. Evidence · text > holding 46 million ounces \(Moz\) of silver in the indicated category #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release ### inferred [Link to this fact](https://atlas-extractions.minestarters.com/news/gr-silver-s-2027-resource-update-decides-what-its-zinc-is-worth--a06b92f8-6de2-4e63-8250-dfd202caf3d0#fact-resource-facts-6) San Marcial · silver #### Identity - Project: San Marcial - Commodity: silver - Region: mexico - Reported Region: Mexico - Ticker: GRSL #### Resource scope - Estimate type: resource - Resource group id: resource:637cd8ee5c64fdc7363a - Mining method: underground #### Resource Data - Category: inferred - Contained Metal: 14000000 - Contained Unit: moz #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-18T00:00:00.000Z Reasoning: Existing inferred resource component of the 2023 estimate. Evidence · text > and 14 Moz in the inferred category #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release ## How Atlas produces this analysis Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.