Chalcopyrite is CuFe2S4 (I think) compared with Bornite being Cu5FeS4. What does this mean? Well bornite is far richer in Copper than Chalcopyrite. I would imagine the multiplier for Bornite would be higher based on a comparision between molecular makeups of these copper minerals.
And waht about the gold content? Visual estimates are imposible for these mineral types. But that is not too say that 1g/t Au is not out of the question!
tuesday is ..., page-31
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