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Gold/Mining/Energy : Naxos Resources (NAXOF) -- Ignore unavailable to you. Want to Upgrade?

To: sh who wrote (17247)	12/15/1998 7:20:00 PM
From: Kim W. Brasington	Read Replies (2) \| Respond to of 20681

sh: Assays will tell you how much precious metals are present in a given material. Because a material may assay, does not mean that it can be recovered. Assays increase in reliability when they can be duplicated by multiple labs, provided that the sample size is large enough to accurately test. An assay therefore should never be treated as a guarantee of recovery. Bulk testing falls more within the realm of recovery than assaying (although it can be used to establish the presence of precious metals, if previous assaying results have been inconsistent), because it is using large enough quantities to actually take the gold or whatever to metal. Not all precious metals that are in solution that can be read (assayed), can be taken to metal. What you have therefore when a bulk test takes some material and extracts precious metals is a miniature recovery test. A bulk test is not accurate however for determining the economics of recovery (normally, unless the material is a known prototype). Economics of recovery is best tested in a pilot plant. In summation, - assaying is for telling if there are precious metals present; - bulk testing is for determining if the precious metals are recoverable; - pilot plant testing is for determining the economic viability and best extraction variables. Regards, Kim W. Brasington