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Gold Prospecting
Alluvial Gold Prospecting
The travel of Alluvial goldl
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<blockquote data-quote="user 4386" data-source="post: 488173" data-attributes="member: 4386"><p>The tendency is for most large nuggets to stay in soil just below their source. Here is a map showing the nuggets greater than 15 kg - all are barely moved from their sources in the Ballarat West, Ballarat East and Nerrina (Little Bendigo) fields. All the shafts shown are on quartz veins (which define the three parallel fields). Similar on other fields (eg the Welcome Stranger was found just downhill from its probable source). Few nuggets ever make it further than the gully at foot of slope (if that far), much less a major stream.</p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/4386/1557233706_ballarat_nuggets.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>There is a pattern - eluvial placers tend to involve removal of lighter material and leaving nuggets at source - enriching the gold by removing lighter rock etc. The finer gold that gets into the stream and gets carried away, it then gets dropped out in places where the velocity of the stream decreases, So two types of placer, winnowing of light material at source, dumping of fine gold when streams slow.</p><p></p><p>If you want coarse gold, stay close to source.</p></blockquote><p></p>
[QUOTE="user 4386, post: 488173, member: 4386"] The tendency is for most large nuggets to stay in soil just below their source. Here is a map showing the nuggets greater than 15 kg - all are barely moved from their sources in the Ballarat West, Ballarat East and Nerrina (Little Bendigo) fields. All the shafts shown are on quartz veins (which define the three parallel fields). Similar on other fields (eg the Welcome Stranger was found just downhill from its probable source). Few nuggets ever make it further than the gully at foot of slope (if that far), much less a major stream. [img]https://www.prospectingaustralia.com/forum/img/member-images/4386/1557233706_ballarat_nuggets.jpg[/img] There is a pattern - eluvial placers tend to involve removal of lighter material and leaving nuggets at source - enriching the gold by removing lighter rock etc. The finer gold that gets into the stream and gets carried away, it then gets dropped out in places where the velocity of the stream decreases, So two types of placer, winnowing of light material at source, dumping of fine gold when streams slow. If you want coarse gold, stay close to source. [/QUOTE]
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Gold Prospecting
Alluvial Gold Prospecting
The travel of Alluvial goldl
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