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Overig advies 17/01/2023 13:01
VANCOUVER, B.C. Western Copper and Gold Corporation (“Western” or the “Company”) (TSX: WRN; NYSE American: WRN) announces results from a metallurgical program (the “Metallurgical Program”) and a drill program (the “Drill Program”) executed in 2022 for its wholly owned Casino Copper-Gold Project (“Casino”).

The Metallurgical and Drill Programs were developed in collaboration with Rio Tinto as outlined in the Investor Rights Agreement and Subscription Agreement entered as part of an investment by Rio Tinto Canada in Western (see news release dated May 17, 2021). Results from the Programs were reviewed by a joint team consisting of Rio Tinto and Western personnel and consultants.

“Metallurgical results from the recent testing support and in some cases improve upon the metallurgical recoveries used in the Feasibility Study”, said Paul West-Sells, President and CEO, “and the drill results continue to build out our geological understanding of the deposit.”

Metallurgical Program

Test work consisted of detailed mineralogy, heap leach testing, comminution testing, flotation testing and detailed analysis of flotation concentrates. Sample selection and composite sample generation followed the expected mining plan, as outlined in the 2022 feasibility study (the “Feasibility Study”, see news release dated August 9, 2022). Heap leach test work within the Metallurgical Program was completed at SGS Mineral Services of Burnaby, B.C., while all other test work was completed at ALS Metallurgy of Kamloops, B.C.

The Metallurgical Program primarily used drill core composites of material representing both potential mill and heap leach feed taken from the 2021 diamond drilling program (see news release dated March 24, 2022). Seven drill holes were used to create 21 metallurgical composites for testing. These holes intersected all significant lithologic zones of the Casino deposit, ranging from a copper depleted leached cap (“CAP”) zone near surface, through a supergene zone (“SUP”) of low to moderate copper mineral oxidation and secondary sulphide mineralization, to unweathered hypogene (“HYP”) material at depth.

The heap leach test work included samples that were taken in 2020 from near surface (0.5 m or greater below the overburden-bedrock interface) using an excavator and separated into lithologic composites representing Dawson Range Batholith (“WR”), Patton Porphyry (“PP”) and Intrusive Breccia (“IX”) mineralization and assay rejects.

Grinding and Flotation Test Work

Test Samples

Table 1 shows drill holes DDH21-6 and DDH21-7, indicating composite intervals generated, as well as sample grades and lithologies. The HYP and SUP zones represent approximately 70 and 30 percent of the planned mill feed respectively.

Table 1: Flotation composite sample characterization of selected test samples.

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