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Chesapeake Provides Metallurgical Update for Metates
Vancouver, British Columbia--(Newsfile Corp. - September 13, 2022) - Chesapeake Gold Corp. (TS...
About this update from Chesapeake Gold Corp.
[{"type":"text","content":"Chesapeake Provides Metallurgical Update for MetatesVancouver, British Columbia--(Newsfile Corp. - September 13, 2022) - Chesapeake Gold Corp. (TSXV: CKG) (OTCQX: CHPGF) (\"Chesapeake\" or the \"Company\") is pleased to provide a metallurgical update for its world class, Metates gold-silver project located in Durango State, Mexico.Metallurgical Testwork Program - Initial ColumnThe sulphide heap leaching metallurgical test program commenced in May 2021 with a sample that had already been crushed to ½\" and stored in Denver for several years. The sample was placed in a transparent column for the oxidation phase. The column was run for 128 days and achieved an oxidation of approximately 30%. After the oxidation phase, the column was rinsed and then leached with a standard lime cyanide solution. The leach cycle was run for 90 days, similar to a standard oxide gold heap leach test. To view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/752/136838_baf5e367348198f5_002full.jpgTo view an enhanced version of this graphic, please visit:https://images.newsfilecorp.com/files/752/136838_baf5e367348198f5_003full.jpgThe above graph shows that over the 90-day leach period, the gold recovery reached almost 60% and silver recovery just over 50%. These results are extremely encouraging as they show significantly higher precious metal recoveries than unoxidized samples from previous test work used to support the 2013 and 2016 prefeasibility studies (PFS).Phase 1 - Oxidation TestworkWith fresh drill samples, an extensive metallurgical test program commenced in a Vancouver laboratory. The core material was composited into two bulk samples. One for the Massive Intrusive mineralisation and one for the Intrusive Breccia mineralisation. These two rock types represent the higher-grade core mineralisation and have been the focus of the testwork program to date.The initial tests were all run under the same conditions and were aimed at developing time vs' oxidation vs' gold and silver recovery curves for both the Massive Intrusive and Intrusive Breccia. Two columns were also run with NO pre-oxidation to determine a baseline \"Zero\" oxidation gold and silver recovery. The oxidizing columns were run for 60, 120 and 180 days.With no pre-oxidation the two mineralization types tested returned approximately 35% gold a...