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Gold Prospecting
Gold localities & information
Selling gold - how, why, where
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<blockquote data-quote="user 4386" data-source="post: 592700" data-attributes="member: 4386"><p>Geologically you can make some generalisations, but there are always exceptions. High silver is common in what we call epithermal volcanic deposits (widespread in Queensland). Low silver is common in what are often referred to as slate belt (eg central Victoria) or greenstone belt (e.g. Eastern Goldfields) deposits - many geologists refer to them as "gold only" deposits, although this does not refer to silver content but lack of other metals such as copper in the primary ores. Silver is invariably extremely low in supergene (weathering zone) deposits. So you can have 99.7% gold purity in the "laterites" that overlie a primary deposit in which the gold is 85% pure/</p></blockquote><p></p>
[QUOTE="user 4386, post: 592700, member: 4386"] Geologically you can make some generalisations, but there are always exceptions. High silver is common in what we call epithermal volcanic deposits (widespread in Queensland). Low silver is common in what are often referred to as slate belt (eg central Victoria) or greenstone belt (e.g. Eastern Goldfields) deposits - many geologists refer to them as "gold only" deposits, although this does not refer to silver content but lack of other metals such as copper in the primary ores. Silver is invariably extremely low in supergene (weathering zone) deposits. So you can have 99.7% gold purity in the "laterites" that overlie a primary deposit in which the gold is 85% pure/ [/QUOTE]
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Gold Prospecting
Gold localities & information
Selling gold - how, why, where
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