re: Ann: Assays Confirm High Grade Copper Int... Leach by standard sulphuric acid solvent should get good recovery from the malachite, but not much from the chalcocite. Maybe 60 - 70% overall. Maybe even more. Would hope better than 50%. Just a guess. If there is a lot of chalcocite in the mix then the economics might make other processing come into play.
You got burnt on BYR too. Buggers for withholding those early Ghana results.
Ann: Assays Confirm High Grade Copper Intersectio, page-16
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