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Prospecting for Silver With a Geiger Counter
January 2001 by Edgar B. Heylmun, PhD
Light-colored volcanic tuff or tuffaceous sandstone often contains small amounts of uranium, enough to be detected with a sensitive radiation detector. Sometimes, the mass effect of the radiation is substantial.Legislative and Regulatory Update
• USFS Draft Reclamation Bond Guide needs your comments
• Colorado seeks ownership of rights of way
• Comments needed for Sierra Nevada EIS
• Roadless rule to stand, with a few changes
Benefits of a Detecting Partner
“Metal detecting is not a social function.” So said a good friend of mine. And it’s true. But that’s not to say the benefits of having a prospecting partner don’t outweigh those of being alone.
The Value of Evidence
That prospecting effort you are about to spend your time on...is it worth your effort? If you are going to devote your time to it, you will need all the facts you can get.
Legislative and Regulatory Update
• Forest Service to revisit 228 regulations
• WOTUS Executive Order suspended
Melman on Gold & Silver
Budgetary deficits can be reversed by a combination of only two factors; increasing revenues and decreasing expenditures, and we would prefer a combination of both factors occurring simultaneously. Unfortunately, it appears to us that President Obama failed to respond to such simple considerations.
Determining The Optimal Crushing Size for Gravity Recovery
It’s not easy to figure out what is best without testing, and so a certain level of confusion has developed about how small the ore ought to be crushed.
$50 Million Swiped in Diamond Heist
Eight masked gunmen forced their way through the security fence at Brussels’ international airport, drove onto the tarmac and snatched some $50 million worth of diamonds from the hold of a Swiss-bound plane without firing a shot.
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• Over the Divide
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• Special Editorial: Gold Anti-Trust Action Committee Believes They Have the Evidence
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• Metal Detecting Within the Cordillera for Gold Placers Associated With Tertiary Epithermal Ore Deposits
• Picks & Pans: An Exciting Hobby
• The Furnace Atmosphere During the Fire Assay
• The Hanging Tree
• Gold in Chihuahua, Mexico
• ICMJ 10th Annual Photo Contest Results
• Melman on Gold & Silver
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