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Gold Prospecting
Hard Rock Gold Prospecting
can you find gold in slate slabs
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<blockquote data-quote="user 4386" data-source="post: 338880" data-attributes="member: 4386"><p>The photo seems to show cubes of pyrite, but not obviously in sufficient quantity to give such a result (pyrite is a mediochre conductor, and usually a metal detector will only respond well to native metals, e.g. gold, copper, although some sulphide mi9nerals such as galena are usually fairly conductive). However pyritic slate commonly contains a lot of graphite - could that be the cause, as it is a good conductor? Gold can occur in slate but is not partricularly common and as someone said above, more commonly occurs in quartz in the slate. However attempts have been made to mine gold-bearing slate in Victoria (e.g. Kamarooka, Wedderburn) but grades are low and recovery is difficult from graphite-rich rocks ("preg-robbing" carbon). One reason that gold can occur in slate is because the carbon in the slate can precipitate gold that is dissolved in solution in water that passes through the rock. Don't forget that a simple multimter such as you might carry in your car tool kit can be used to detect conductive minerals in a sample</p></blockquote><p></p>
[QUOTE="user 4386, post: 338880, member: 4386"] The photo seems to show cubes of pyrite, but not obviously in sufficient quantity to give such a result (pyrite is a mediochre conductor, and usually a metal detector will only respond well to native metals, e.g. gold, copper, although some sulphide mi9nerals such as galena are usually fairly conductive). However pyritic slate commonly contains a lot of graphite - could that be the cause, as it is a good conductor? Gold can occur in slate but is not partricularly common and as someone said above, more commonly occurs in quartz in the slate. However attempts have been made to mine gold-bearing slate in Victoria (e.g. Kamarooka, Wedderburn) but grades are low and recovery is difficult from graphite-rich rocks ("preg-robbing" carbon). One reason that gold can occur in slate is because the carbon in the slate can precipitate gold that is dissolved in solution in water that passes through the rock. Don't forget that a simple multimter such as you might carry in your car tool kit can be used to detect conductive minerals in a sample [/QUOTE]
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Gold Prospecting
Hard Rock Gold Prospecting
can you find gold in slate slabs
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