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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="user 4386" data-source="post: 632302" data-attributes="member: 4386"><p>Usually that is because gold fell into cracks in the clay that formed the bedrock of the streams - the clay in that case is usually still carrying recognisable features of the original rock such as bedding and cleavage, and is difficult to break down by panning or sluicing. About a third of gold in alluvial gold leads was often in this, two-thirds in the overlying gravel.</p><p></p><p>Clay that OVERLIES the gravel is usually a dead loss. That is because gold concentration is a mechanical process - high density gold grains tend to concentrate in gravel or drop into cracks in underlying bedrock.</p></blockquote><p></p>
[QUOTE="user 4386, post: 632302, member: 4386"] Usually that is because gold fell into cracks in the clay that formed the bedrock of the streams - the clay in that case is usually still carrying recognisable features of the original rock such as bedding and cleavage, and is difficult to break down by panning or sluicing. About a third of gold in alluvial gold leads was often in this, two-thirds in the overlying gravel. Clay that OVERLIES the gravel is usually a dead loss. That is because gold concentration is a mechanical process - high density gold grains tend to concentrate in gravel or drop into cracks in underlying bedrock. [/QUOTE]
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Gold Prospecting
Metal Detecting for Gold
What Is/Was Pipeclay And How Is It Formed?
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