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Gold Prospecting
Gold Maps & Resources
Tengraph geology mosaic interpretation help
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<blockquote data-quote="user 4386" data-source="post: 516719" data-attributes="member: 4386"><p>Starting with A are various types of Archean (the oldest) rocks. I'm guessing but I would think an s means sedimentary, u means ultramafic, b might be basalt (metabasalt). You would mostly expect gold "reefs" in b rather than s but ithey could be in any A</p><p>Starting with P would be Proterozoic and dy would be a dyke - no good for gold</p><p>Starting with Cz are fairly young sedimentary rocks (Cenozoic), which include laterite l and probably calcrete c. The laterite can be excellent for ironstone gold, calcrete is useless</p><p>Starting with Q would be the youngest of all, Quaternary, and a would be alluvium (the sand and gravel and clay of present-day creeks). Might have some alluvial gold but mostly poor for detecting.</p><p></p><p>All from memory, but that sort of terminology is fairly common. Hope that helps a bit</p></blockquote><p></p>
[QUOTE="user 4386, post: 516719, member: 4386"] Starting with A are various types of Archean (the oldest) rocks. I'm guessing but I would think an s means sedimentary, u means ultramafic, b might be basalt (metabasalt). You would mostly expect gold "reefs" in b rather than s but ithey could be in any A Starting with P would be Proterozoic and dy would be a dyke - no good for gold Starting with Cz are fairly young sedimentary rocks (Cenozoic), which include laterite l and probably calcrete c. The laterite can be excellent for ironstone gold, calcrete is useless Starting with Q would be the youngest of all, Quaternary, and a would be alluvium (the sand and gravel and clay of present-day creeks). Might have some alluvial gold but mostly poor for detecting. All from memory, but that sort of terminology is fairly common. Hope that helps a bit [/QUOTE]
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Tengraph geology mosaic interpretation help
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