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Gold/Mining/Energy : BRE-X, Indonesia, Ashanti Goldfields, Strong Companies.
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To: AreWeThereYet who wrote (8335)3/26/1997 9:29:00 PM
From: Bill Jackson   of 28369
 
Andy; You might think that an assay method would tell all accurately and precisely and that all would be the same. Not so. A leach test of a sample at say 200 mesh tells you what gold you could get if you leached it, in a heap leach etc. A fire assay might get more, but the gold found inside quartz would not leach, and so you might make your mine and then find you cannot get the gold. It is there but out of reach. Conventional milling to 400 mesh usually makes it leachable but you often cannot mill low grades that fine and make money. So you try to assay with a method that gives you the economic answers.
Bill
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