The Oregon Claim
December 2010 by Chuck LassiterWhen I started dredging a short distance downstream from that feature I realized that I was into a major paystreak and much of the gold was coming right out of the upper gravel. I could see the chunky pieces falling out of the gravel as they were pulled into...
They tend to be big, coming in large to extremely large sizes. They can also be amazingly rich and produce huge amounts of very high-grade ore.
One of the issues that prospectors run into when working to upscale from micro-scale hard rock testing to a greater production output, is that they often confuse individual devices or machines with systems.
While mapping, I also found rock chips in the soil that were characteristic of the same wall rock alteration that occurs adjacent to the known lodes in the greenstone belt.
The evaluation must also consider the gold fineness or purity. The purity of the Sugardaddy nuggets is estimated at 850 fineness, meaning 85% is gold (Au), 12% is silver (Ag) with 3% being other gangue alloyed metal.
The biggest obstacle is that like many streams on the Kenai Peninsula, high water during the summer months from snow melt and rain can make dredging nearly impossible. The best dredging is in the colder months of the year.
In an old mine that does not have stopes, you know the old miners did not take much if any ore out of that excavation. On the other hand, if you see large stopes within the mine you know that it is these places where the miners found profitable ore deposits within the vein.
Centrifugal bowls versus jigs
The Bawl Mill • Ask The Experts—Iridium • Ask The Experts—Highbanker legal in CA?; Best place to sell raw gold? • Ask The Experts—Using classifiers • So, Where's The Gold?—Finding Gold Detectors Miss • Forest Service v. Michael & Linda Backlund • Highbanking on the Feather River • CFTC Finds Evidence of Silver Market Manipulation • Gold in Arizona • Detecting for Gold in Australia—The Kimberley Trip • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices