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Gold Prospecting
Metal Detecting for Gold
Help Required On Piles Of Pipe Clay
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<blockquote data-quote="user 4386" data-source="post: 632303" data-attributes="member: 4386"><p>See latest discussion on pipe clay, which describes why some of these above observations are made.</p><p></p><p>Also, granite is usually quartz, feldspar and micas (white or black). When it is weathered and washed into streams, the quartz remains as quartz but the feldspar quickly alters to clay (feldspar is commonly a sodium, potassium aluminium silicate, clay is often a hydrated potassium aluminium silicate (illite) or hydrated aluminium silicate (kaolinite) - the feldspa is reacting with water and incorporating the water into its clay structure. Quartz tends to be concentrated mechanically as grains (as does gold) but clay will stay suspended in water and travel separately until a quiet place is reached where it can settle out, So granite can give you quartz sand and also clay deposits. Some of our best china clays (eg Pittong) form from granite....</p></blockquote><p></p>
[QUOTE="user 4386, post: 632303, member: 4386"] See latest discussion on pipe clay, which describes why some of these above observations are made. Also, granite is usually quartz, feldspar and micas (white or black). When it is weathered and washed into streams, the quartz remains as quartz but the feldspar quickly alters to clay (feldspar is commonly a sodium, potassium aluminium silicate, clay is often a hydrated potassium aluminium silicate (illite) or hydrated aluminium silicate (kaolinite) - the feldspa is reacting with water and incorporating the water into its clay structure. Quartz tends to be concentrated mechanically as grains (as does gold) but clay will stay suspended in water and travel separately until a quiet place is reached where it can settle out, So granite can give you quartz sand and also clay deposits. Some of our best china clays (eg Pittong) form from granite.... [/QUOTE]
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Gold Prospecting
Metal Detecting for Gold
Help Required On Piles Of Pipe Clay
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