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Gold Prospecting
Metal Detecting for Gold
What Is/Was Pipeclay And How Is It Formed?
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<blockquote data-quote="mbasko" data-source="post: 630514" data-attributes="member: 4485"><p>Pipeclay is fine grained usually white/grey clay. Can be yellow/orange too & Catlinite pipeclay is red.</p><p>The make up would depend on location & can include calcite, dolomite, silica/quartz, kaolinite, gypsum etc. etc. Some areas show quartz as only a minor inclusion.</p><p>Can't find any reference to super heated quartz? More likely to come from weathering/leaching of fine gravels/sands in quartz areas combined with an absence of iron minerals for lighter colours IMO?</p><p>I think the true definition of pipeclay probably gets misused a bit in gold areas - we tend to call any lighter coloured clay layer pipeclay whether it is a true pipeclay or not?</p><p>Goldirocks would know.</p></blockquote><p></p>
[QUOTE="mbasko, post: 630514, member: 4485"] Pipeclay is fine grained usually white/grey clay. Can be yellow/orange too & Catlinite pipeclay is red. The make up would depend on location & can include calcite, dolomite, silica/quartz, kaolinite, gypsum etc. etc. Some areas show quartz as only a minor inclusion. Can't find any reference to super heated quartz? More likely to come from weathering/leaching of fine gravels/sands in quartz areas combined with an absence of iron minerals for lighter colours IMO? I think the true definition of pipeclay probably gets misused a bit in gold areas - we tend to call any lighter coloured clay layer pipeclay whether it is a true pipeclay or not? Goldirocks would know. [/QUOTE]
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Gold Prospecting
Metal Detecting for Gold
What Is/Was Pipeclay And How Is It Formed?
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