Picks & Pans: Gold Recovery in Placer Mining Operations
August 1999 by StaffTwo of the major factors affecting the profitability of a placer mining enterprise are the relative efficiency of the mining equipment, and the rate and percentage of recovery obtained while conducting mining operations.
What many people don’t realize is that the Comstock Lode produced over 8,000,000 ounces of gold…
The strike and the dip of the veins can be broken down into two categories: veins in the eastern area and along Lander Hill, and the veins in the southwestern portion of the district.
The other opportunity that I see is in seeking unusual types of deposits. Specifically, the prospector would be searching for the stuff no one (or almost no one) is searching for. These deposits are effectively hiding in plain view.
The areas that were mineralized with the bedded ore were huge and vast tonnages were indicated, although they had no idea at the time.
For the prospector, knowing what oxidized hydrothermal alteration looks like in the field is an important exploration tool.
While both zinc and lead deposits also are enriched by the surface weathering process, in part two we will look at the enrichment process for copper and also gold deposits, and at the interpretation of leached outcrops to figure how rich the concentrated deposits below them may be.
The fact that mineral deposits can contribute specific types of heavy minerals is why the analysis of the heavy mineral concentrates in the streams of an area can be an important prospecting technique for finding undiscovered mineral deposits.
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