Small Mining Operations
High Sulfidation Epithermal Deposits
November 2019 by Chris Ralph
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.
Finding Gold in Tailing Piles
Old mine workings and tailing piles can represent opportunities on many levels, from the chance to simply find a nugget on up to the commercial reworking of the old tailings for profit.
Commercial Blaster Training
Since last year’s articles on explosives for mining, several people have asked for more information about becoming a licensed blaster.
Simple Mine Surveying With Basic Hand Tools
…there is an easy way to create a reasonably accurate map without any fancy instruments.
Small-Scale Concentrating and Recovery Methods
The first step in my recovery process after milling the ore to the desired size is to table it. On this particular ore, I get good results milling it to minus 100 mesh.
Nice Specimen Gold Recovered in Northern California
Each specimen is carefully examined to determine if it would be beneficial or not to use an acid treatment to reveal more of the gold.
The “Chuck It Out” Nugget
This was no ordinary nugget. It had not traveled very far from its nearby source, and that did mean a lot, as we were searching for the source of several such nuggets found during a gold rush that occurred in 1859.
Hard Rock Milling: A Matter of Scale
Most prospectors understand placer mining a lot better than hard rock mining and don’t realize the amount of work that goes into processing different types of hard rock ore.
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The Bawl Mill
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• Montana Gold and Sapphires Revisited
• A Third Generation Small-Scale Hardrock Revival
• Gold Prospecting for Better or Worse: Respect the Angle of Repose
• The Summer of ‘81
• The “Chuck It Out” Nugget
• Gold and Silver Deposits of Bodie, California
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
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