Prospecting & Detecting
Prospecting Underground: Use Caution
April 2011 by Don Robinson
In underground placer work, the contact point of the bedrock tunnel and the gravel is a very weak point and always has to be timbered. The bedrock here is thin, fractured, and the gravels loose from many years of oxidizing.Sierra County Gold—Part I
...this county contained some of the richest placer ground found in all of California and still produces some pretty impressive finds to this day.
So Where's The Gold?
...we finally got back to this exploration effort. The old works there were up above the old camp, which was very significant in size.
Want to Go to Australia?
Every year there are large nuggets found by the diligent, and occasionally by the lucky newbie.
Ask the Experts
Setting up a gravity dredge
Detecting for Gold in Nevada
Within a few minutes I got my first signal and dug out a small flake about three grains.
Prospecting Knowledge -- Pass It On!
I had two of the guys go down into the creek and each one picked out a small island of bedrock. I had them detect their piece of bedrock and then gave a critique to all on how they did.
Q&A With Detector Designer Dave Johnson
...it’s been a little known secret that one man was involved in designing many of the most respected very low frequency (VLF) nugget detectors on the market. Dave Johnson has designed gold-oriented detectors for Tesoro, Whites, Fisher and others for more than 25 years.
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The Bawl Mill
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• Small-Scale Concentrating and Recovery Methods
• 5th Circuit Ruling May Benefit Miners
• Indicator Minerals for Gold & Silver
• Mud Men: Pocket Miners of Southwest Oregon Part III
• Legislative and Regulatory Update
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Silver Mining Returning to Texas
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A New Look at Old Mines
• Proposed Regulations for California Suction Dredging
