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Gold Prospecting
Hard Rock Gold Prospecting
Home sampling finally started
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<blockquote data-quote="Metamorphic" data-source="post: 108342" data-attributes="member: 3682"><p>Great pics Pete,</p><p></p><p>Without seeing the area, its my guess that the host is a mixture of Metamorphic and Sedimentary rock (Slate and Sandstone mainly).</p><p></p><p>The sedimentary would have been closer to the surface crust of the reef and its deterioration with calcite, or sulfides over time would have formed the 'cement' covering you speak of.</p><p></p><p>In some of the snaps I can see evidence of Ironstone infiltration, perhaps where the reef host changes along its line, or the calcites have weathered into iron stained spots when the pyrites convert to iron oxides as Heatho points out.</p><p></p><p>Either way would be good as large amounts of iron oxides like hematite, magnetite and ironstone can be favorable indicators..</p><p></p><p>The old timers used to say that at the end of the reefs gold bearing structure, they would commonly find this type of evidence.</p><p>In many districts, acidic mineral solutions have bleached the area rocks to a lighter color like those in your pics. </p><p>This can be an indicator of gold.</p><p></p><p>I would attempt to follow the 'line of reef' if possible, and locate any areas where the host changes to Ironstone, if at all.</p><p></p><p>Hope you get some color mate <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> </p><p></p><p>Cheers</p></blockquote><p></p>
[QUOTE="Metamorphic, post: 108342, member: 3682"] Great pics Pete, Without seeing the area, its my guess that the host is a mixture of Metamorphic and Sedimentary rock (Slate and Sandstone mainly). The sedimentary would have been closer to the surface crust of the reef and its deterioration with calcite, or sulfides over time would have formed the 'cement' covering you speak of. In some of the snaps I can see evidence of Ironstone infiltration, perhaps where the reef host changes along its line, or the calcites have weathered into iron stained spots when the pyrites convert to iron oxides as Heatho points out. Either way would be good as large amounts of iron oxides like hematite, magnetite and ironstone can be favorable indicators.. The old timers used to say that at the end of the reefs gold bearing structure, they would commonly find this type of evidence. In many districts, acidic mineral solutions have bleached the area rocks to a lighter color like those in your pics. This can be an indicator of gold. I would attempt to follow the 'line of reef' if possible, and locate any areas where the host changes to Ironstone, if at all. Hope you get some color mate ;) Cheers [/QUOTE]
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Gold Prospecting
Hard Rock Gold Prospecting
Home sampling finally started
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