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Gold Prospecting
Metal Detecting for Gold
Detecting bigger gold in NSW...."Alluvial" vs "Eluvial"
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<blockquote data-quote="user 4386" data-source="post: 647976" data-attributes="member: 4386"><p>If you look at the shafts you will see that there are three roughly parallel mineralized reef zones, each about 16 km in length, Ballarat West, Ballarat East and Little Bendigo. Something that is not obvious if you are just wandering around with no control. The GSV mineral localities layer can be separated by those with any GIS expertise into alluvial and hard-rock gold shafts (i.e. separate attributes) so that you can define source areas for all Victorian goldfields, not just Ballarat. You can then call up the stream layer and superimpose it on the hard-rock shafts, and sketch in the boundaries of the areas worth detecting.</p><p></p><p>In some cases there is also a lead layer, and some of the buried leads can have a vastly different course to modern streams and even be cut by them, Where such a layer exists it can also be superimposed, as these can become gold source areas for modern streams where cut by them. You can also call up rock type layers (avoid granite in most of central Victoria, avoid Tertiary basalt flow, avoid areas of young alluvium far from the edge of hills, focus on Devonian or older rocks in Victoria for gold). Superimpose them all as on this map.</p><p></p><p>The reason hard-rock shafts occur over a greater width in some areas is because in detail there are really two mineralized zones close together at Little Bendigo (Nerrina) and three at Ballarat West. So if you zero in to a larger scale on the areas you choose, you can see these zones start to separate into separate linear zones and focus your efforts even more.</p></blockquote><p></p>
[QUOTE="user 4386, post: 647976, member: 4386"] If you look at the shafts you will see that there are three roughly parallel mineralized reef zones, each about 16 km in length, Ballarat West, Ballarat East and Little Bendigo. Something that is not obvious if you are just wandering around with no control. The GSV mineral localities layer can be separated by those with any GIS expertise into alluvial and hard-rock gold shafts (i.e. separate attributes) so that you can define source areas for all Victorian goldfields, not just Ballarat. You can then call up the stream layer and superimpose it on the hard-rock shafts, and sketch in the boundaries of the areas worth detecting. In some cases there is also a lead layer, and some of the buried leads can have a vastly different course to modern streams and even be cut by them, Where such a layer exists it can also be superimposed, as these can become gold source areas for modern streams where cut by them. You can also call up rock type layers (avoid granite in most of central Victoria, avoid Tertiary basalt flow, avoid areas of young alluvium far from the edge of hills, focus on Devonian or older rocks in Victoria for gold). Superimpose them all as on this map. The reason hard-rock shafts occur over a greater width in some areas is because in detail there are really two mineralized zones close together at Little Bendigo (Nerrina) and three at Ballarat West. So if you zero in to a larger scale on the areas you choose, you can see these zones start to separate into separate linear zones and focus your efforts even more. [/QUOTE]
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Gold Prospecting
Metal Detecting for Gold
Detecting bigger gold in NSW...."Alluvial" vs "Eluvial"
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