Prospecting for Silver With a Geiger Counter
January 2001 by Edgar B. Heylmun, PhDLight-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.
Only the richest ores could be worked and shipped off for processing at a profit. As a result, early mining in the southern part of the Humboldt Range was short-lived. In the 1880s, placers were discovered in Spring Valley and American Valley on the east side of the range...
Gold is a fairly widespread mineral in the Italian Alps and in the Northern Apennines. It is found both in primary mineralization and in past and recent floods.
As we all get back to “normal,” or as close to it as we can, I want to take this opportunity to thank all of our advertisers for sticking it out through the hard times.
This will provide the opportunity to meet with many of the members of Congress in a more informal setting at several meetings, luncheons and dinners. And we have been offered the chance to meet with President Trump’s staff.
Bottom line for you fellow miners: file your claims now in these areas or risk being forever locked out!
The Bawl Mill • Over the Divide • Our Readers Say • Special Editorial: Gold Anti-Trust Action Committee Believes They Have the Evidence • World Gold Council News • 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 • Mining Stock Quotes and Mineral & Metal Prices • Looking Back