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.
Evolution Of A Desert Wash Plant
The water instantly dropped though the screen, leaving a pile of mud behind! I was so excited that I replaced it with a 150-mesh screen, and the same thing happened!
Ask The Experts
Q: How do I improve my small-scale mining operation’s gold production?
Detector Brings New Life to An Old Lode Mine
…it was immediately evident the previous owner had not been using a detector. During just a few months of working the dumps part-time, he recovered gold in quartz specimens valued in excess of $40,000.
Resurrecting an Old Hard Rock Mine—Setting Up the Millsite
One of the first things we did while looking at buying the equipment was figuring out how it would dovetail into the milling process we already had in mind.
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.
Lessons Learned From Geologists
Not long after this, I was camped out with the geologist beside the Similkameen River where he showed me the evidence that an ancient channel existed on our claim.
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• 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
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