Detecting at Old Hydraulic Mines
July 2006 by Chris RalphI finally got out recently for my first full, long weekend prospecting trip of the year. Normally I would have been out much sooner, but we had a real late spring in the Sierra Nevada this year with lots of late rain and snow continuing through all...
ICMJ has reviewed the U.S. DOI, BLM, 516 page Environmental Impact Statement on proposed 43 CFR 3809...and can only conclude that the proposed action amounts to several more nails in mining's coffin.
There were iron stains all over and even a few places where I could see iron trash sticking out of the bedrock. These would be ideal spots to start with as the gold travels with the iron and lead.
Skarn consists of coarse-grained calcium, magnesium, iron, and aluminum silicates formed by hydrothermal solutions, which replace limestone or dolomite near the contact with an igneous intrusion. The contact metamorphism is usually caused by an intrusion such as quartz monzonite, granodiorite, or similar rock type, which may or may not be mineralized.
If you are interested in researching mining claims for any purpose, you will first have to decipher the BLM’s LR2000, a Rube Goldberg database seemingly designed by a 1980s Soviet-era computer hacker.
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