# CHESAPEAKE ANNOUNCES PROPRIETARY HEAP OXIDATION TECHNOLOGY UPDATES Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/chesapeake-announces-proprietary-heap-oxidation-technology-updates--3476ac67-c8df-48f1-aca7-c2ec9428d2dd Original source: https://chesapeakegold.com/2026/09/22/chesapeake-announces-proprietary-heap-oxidation-technology-updates/ Publisher: prospectors\_exchange Original announcement: 2026-09-22T00:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-09-24T12:58:55.041Z Atlas analysis updated: 2026-09-24T12:58:55.041Z - Company: Chesapeake Gold Corp. - Ticker: CKG - Exchange: Unavailable - Region: Durango, Mexico - Primary commodity: Gold - Secondary commodities: Silver - Document categories: Metallurgy - Extracted: 2026-09-24 12:58:55 UTC Narrative sentiment: 0.70 · Bullish ## Minestarters Atlas summary Chesapeake Gold Corp. reported progress in its proprietary heap oxidation technology at the Metates project, showing improved gold and silver recoveries within shorter oxidation cycles. The update also highlights the potential benefits of HPGR crushing to increase baseline recoveries prior to heap oxidation. Reasoning: Significant metallurgical improvements in recovery and oxidation time for the primary project, supporting upcoming PFS. - Positive factor: Improved gold and silver recoveries in reduced oxidation time - Positive factor: HPGR crushing shows significant recovery uplift - Positive factor: Variability program demonstrates scalability and domain coverage - Negative factor: Commercialization of proprietary technology is still in testing phase - Negative factor: PFS timing is contingent on San Vicente 3 concession recovery Facts used in scoring: 6 ## Classification and evidence **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: The technology involves heap oxidation and HPGR crushing, which are part of a mill/concentrator-style processing flowsheet for sulphide ores. Evidence · text > proprietary heap oxidation technology **QP/CP Signed** Polarity: positive Story-specific tag 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: Dr. Art Ibrado is named as the independent qualified person responsible for the metallurgical technical information. Evidence · text > Dr. Art Ibrado, P.E., of Fort Lowell Consulting PLLC, is the independent, qualified person responsible **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: the document describes a heap\_leach route \("heap leach"\) **Multi-Domain Tested** Polarity: positive Definition: Variability across ore domains \(oxide, transition, fresh\) has been addressed. Why it applies: 2 distinct composites were tested ## Extracted facts Stored fact records: 6. Some facts used in scoring do not have a stored record. ## Metallurgical Results (6) ### heap leach [Link to this fact](https://atlas-staging.minestarters.com/news/chesapeake-announces-proprietary-heap-oxidation-technology-updates--3476ac67-c8df-48f1-aca7-c2ec9428d2dd#fact-metallurgical-facts-0) Metates · gold #### Identity - Project: Metates - Commodity: gold - Region: mexico - Reported Region: Durango, Mexico - Ticker: CKG #### Test Work - Program Status: detailed - Test Type: heap leach - Processing Route: heap oxidation - Sample: Massive Intrusive domain, Phase III variability testwork - Leach Time: 2160 hours #### Recovery - Recovery: 70 % - Recovery Basis: actual\_test #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: Strong recovery in a shortened oxidation cycle for the main ore domain. - Positive factor: Achieved in 90 days vs 180/240 days previously Evidence · text > precious metal recoveries achieving 70% for gold and 61% for silver over the shortened 90-day oxidation phase #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### heap leach [Link to this fact](https://atlas-staging.minestarters.com/news/chesapeake-announces-proprietary-heap-oxidation-technology-updates--3476ac67-c8df-48f1-aca7-c2ec9428d2dd#fact-metallurgical-facts-1) Metates · silver #### Identity - Project: Metates - Commodity: silver - Region: mexico - Reported Region: Durango, Mexico - Ticker: CKG #### Test Work - Program Status: detailed - Test Type: heap leach - Processing Route: heap oxidation - Sample: Massive Intrusive domain, Phase III variability testwork - Leach Time: 2160 hours #### Recovery - Recovery: 61 % - Recovery Basis: actual\_test #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: Significant improvement in silver recovery within a reduced timeframe. - Positive factor: Silver recoveries doubled compared to Phase I Evidence · text > precious metal recoveries achieving 70% for gold and 61% for silver over the shortened 90-day oxidation phase #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 61% is below the weak band \(75%\) ### heap leach [Link to this fact](https://atlas-staging.minestarters.com/news/chesapeake-announces-proprietary-heap-oxidation-technology-updates--3476ac67-c8df-48f1-aca7-c2ec9428d2dd#fact-metallurgical-facts-2) Metates · gold #### Identity - Project: Metates - Commodity: gold - Region: mexico - Reported Region: Durango, Mexico - Ticker: CKG #### Test Work - Program Status: detailed - Test Type: heap leach - Processing Route: heap oxidation - Sample: Intrusive Breccia domain, Phase III variability testwork - Leach Time: 4320 hours #### Recovery - Recovery: 57 % - Recovery Basis: actual\_test #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: Improved recovery for the secondary domain over a 180-day cycle. - Positive factor: Recoveries nearly doubled compared to Phase I Evidence · text > precious metal recoveries increasing to 57% for gold and 60% for silver over a similar 180-day oxidation phase #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal ### heap leach [Link to this fact](https://atlas-staging.minestarters.com/news/chesapeake-announces-proprietary-heap-oxidation-technology-updates--3476ac67-c8df-48f1-aca7-c2ec9428d2dd#fact-metallurgical-facts-3) Metates · silver #### Identity - Project: Metates - Commodity: silver - Region: mexico - Reported Region: Durango, Mexico - Ticker: CKG #### Test Work - Program Status: detailed - Test Type: heap leach - Processing Route: heap oxidation - Sample: Intrusive Breccia domain, Phase III variability testwork - Leach Time: 4320 hours #### Recovery - Recovery: 60 % - Recovery Basis: actual\_test #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: Improved silver recovery for the secondary domain. - Positive factor: Recoveries nearly doubled compared to Phase I Evidence · text > precious metal recoveries increasing to 57% for gold and 60% for silver over a similar 180-day oxidation phase #### Tags used in scoring **Heap Leach Route** Polarity: neutral Definition: Processing via heap leach — lower CAPEX and OPEX, lower recovery expected. Why it applies: processing\_route matches the heap\_leach signal **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 60% is below the weak band \(75%\) ### direct cyanidation [Link to this fact](https://atlas-staging.minestarters.com/news/chesapeake-announces-proprietary-heap-oxidation-technology-updates--3476ac67-c8df-48f1-aca7-c2ec9428d2dd#fact-metallurgical-facts-4) Metates · gold #### Identity - Project: Metates - Commodity: gold - Region: mexico - Reported Region: Durango, Mexico - Ticker: CKG #### Test Work - Program Status: preliminary - Test Type: direct cyanidation - Processing Route: HPGR crushing and direct cyanidation - Sample: Intrusive Breccia, HPGR-crushed material #### Recovery - Recovery: 47 % - Recovery Basis: actual\_test #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: HPGR shows significant potential to boost baseline recoveries. - Positive factor: 16% increase in gold recovery compared to conventional crushing Evidence · text > gold and silver recoveries increasing by 16% and 23% to 47% and 65%, respectively #### Tags used in scoring **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 47% is below the weak band \(80%\) ### direct cyanidation [Link to this fact](https://atlas-staging.minestarters.com/news/chesapeake-announces-proprietary-heap-oxidation-technology-updates--3476ac67-c8df-48f1-aca7-c2ec9428d2dd#fact-metallurgical-facts-5) Metates · silver #### Identity - Project: Metates - Commodity: silver - Region: mexico - Reported Region: Durango, Mexico - Ticker: CKG #### Test Work - Program Status: preliminary - Test Type: direct cyanidation - Processing Route: HPGR crushing and direct cyanidation - Sample: Intrusive Breccia, HPGR-crushed material #### Recovery - Recovery: 65 % - Recovery Basis: actual\_test #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-09-22T00:00:00.000Z Reasoning: HPGR shows significant potential to boost baseline recoveries. - Positive factor: 23% increase in silver recovery compared to conventional crushing Evidence · text > gold and silver recoveries increasing by 16% and 23% to 47% and 65%, respectively #### Tags used in scoring **Low Recovery** Polarity: negative Definition: Recovery below the weak band for the commodity and processing route. Why it applies: 65% is below the weak band \(75%\) ## 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.