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Gold Prospecting
Small Scale Gold Mining
Digging a hole like the old timers
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<blockquote data-quote="SWright" data-source="post: 53509" data-attributes="member: 1541"><p>G'Day Crazyk</p><p></p><p>these are very good photographs. The black-blue material is manganese and the rusty colouration is iron. The oily sheen is from decayed organic matter. The old timers often called such hard material "Cement". It can form also as a as a white material mainly from carbonate (Called calcrete) or a red Cement from iron oxide clled ferricrete. It is a part of the same process that forms silcrete (looks like welded glass) in dryer areas generally on the tops of slopes and it a natural and common part of the weathering process throughout Australia. Manganese, iron, calcium and silica are very mobile elements in the weathering process when streams dry up or the water table rises or falls in the past you will get these type of deposits. Most of the time they do not seem to carry gold and only in some deep leads in Victoria did they manage to treat the Cement.</p><p></p><p>Nothing exotic here folks.</p><p></p><p>Araluen</p></blockquote><p></p>
[QUOTE="SWright, post: 53509, member: 1541"] G'Day Crazyk these are very good photographs. The black-blue material is manganese and the rusty colouration is iron. The oily sheen is from decayed organic matter. The old timers often called such hard material "Cement". It can form also as a as a white material mainly from carbonate (Called calcrete) or a red Cement from iron oxide clled ferricrete. It is a part of the same process that forms silcrete (looks like welded glass) in dryer areas generally on the tops of slopes and it a natural and common part of the weathering process throughout Australia. Manganese, iron, calcium and silica are very mobile elements in the weathering process when streams dry up or the water table rises or falls in the past you will get these type of deposits. Most of the time they do not seem to carry gold and only in some deep leads in Victoria did they manage to treat the Cement. Nothing exotic here folks. Araluen [/QUOTE]
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Gold Prospecting
Small Scale Gold Mining
Digging a hole like the old timers
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