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Mayfair Gold Reports Positive Advanced Metallurgical Test Results for Fenn-Gib Deposit, Ontario
Sulphide flotation to rougher concentrate achieved 96% Au recovery Flotation-Regrind-Cyanidation achieved 91.2% Au recovery Approx. 112,000m of planned 140,000m
About this update from Mayfair Gold Corp.
[{"type":"text","content":" Sulphide flotation to rougher concentrate achieved 96% Au recovery Flotation-Regrind-Cyanidation achieved 91.2% Au recovery Approx. 112,000m of planned 140,000m resource drill program completed VANCOUVER, British Columbia, Feb. 01, 2023 (GLOBE NEWSWIRE) -- Mayfair Gold Corp. (“Mayfair” or the “Company”) (TSX-V: MFG; OTCQB: MFGCF) is pleased to announce positive results from the Company’s 2022-23 advanced metallurgical test program performed on a core‐based bulk sample from the Fenn-Gib deposit. Metallurgical testing was conducted at SGS-Lakefield (“SGS”) under the supervision of Mr. Steve Haggarty, P. Eng. (Haggarty Technical Services), metallurgical consultant to Mayfair Gold. The 100% controlled Fenn-Gib deposit, located in the Timmins region of Northeast Ontario, hosts an NI 43-101 pit-constrained Indicated Resource of 3.06M gold (“Au”) ounces (see the “About Mayfair” section below) with disseminated gold mineralization striking east-west on the Pipestone Fault over more than 1.25 kilometers (km) and is up to 300 meters (m) wide at the west end. Preliminary metallurgical tests conducted in 2021-22, based on a feed grind size of P80 75 microns (µm), returned whole-ore cyanidation gold recoveries of 84.3% and gold flotation recoveries to a final concentrate approaching 94% (news release dated March 28, 2022). In late 2022, SGS conducted flotation rate kinetic tests at varying grind sizes to flotation and, in early 2023, undertook concentrate cyanidation tests at varying concentrate regrind sizes to optimize overall gold recovery from a flotation-cyanidation flowsheet alternative. Recent test results confirm that there is a negligible difference in gold recovery when coarsening the grind size to flotation from P80 75 µm to P80 106 µm. Sulfide flotation to a rougher concentrate achieved 96% Au recovery with a target 20-25% mass pull. In addition, fine grinding of rougher concentrate at P80 10 µm followed by cyanidation yielded 95.0% Au extraction from the reground rougher concentrate, resulting in an overall 91.2% Au recovery from Flotation-Regrinding-Cyanidation. Metallurgical testing completed to date is sufficient to advance conceptual engineering as a pre-feasibility study, which is planned to commence shortly. Processing concepts presently being studied include (i) pyrite flotation to produce a gold...