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Gold Prospecting
Gold Maps & Resources
Geological Maps - information and questions
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<blockquote data-quote="user 4386" data-source="post: 434459" data-attributes="member: 4386"><p>No, greenstone is not a name for granite - it is used for greenish rocks that used to be basalt lavas etc. They are pretty good for gold. I was simply warning you to avoid granite areas in general. The accuracy of a map varies with scale and the geo who maps it does not walk all the ground (most is done by remote sensing followed by ground checking of key areas). So you often find unmapped patches of granite inside areas shown as greenstone (in some areas anyway), so just walk over them without wasting time - focus on the greenstone. Banded iron formation can also be an important host for gold (eg Hill 50 mine at Mt Magnet).</p><p></p><p>Gold can occur in granite elsewhere in Australia (some major mines), but it is extremely rare in the Eastern Goldfields.</p></blockquote><p></p>
[QUOTE="user 4386, post: 434459, member: 4386"] No, greenstone is not a name for granite - it is used for greenish rocks that used to be basalt lavas etc. They are pretty good for gold. I was simply warning you to avoid granite areas in general. The accuracy of a map varies with scale and the geo who maps it does not walk all the ground (most is done by remote sensing followed by ground checking of key areas). So you often find unmapped patches of granite inside areas shown as greenstone (in some areas anyway), so just walk over them without wasting time - focus on the greenstone. Banded iron formation can also be an important host for gold (eg Hill 50 mine at Mt Magnet). Gold can occur in granite elsewhere in Australia (some major mines), but it is extremely rare in the Eastern Goldfields. [/QUOTE]
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Gold Prospecting
Gold Maps & Resources
Geological Maps - information and questions
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