History & Geology
Copper Deposits of Alaska
February 2014 by Steve Herschbach

Ask The Experts
Gold in clastic black shale
The Downieville Gold District

Large Gold Deposit Types
It is not necessary to have a PhD in geology, but you need to know the basics, so that’s what I am going to try to dig into here—the understandable basics of these gigantic gold deposits.
Why Haven't They Mined This Claim?

All About Chalcopyrite

The Silver, Gold and Gemstones of Candelaria, Nevada

Mining Pegmatite Deposits
With successively lower temperatures as the water mixture cools, new sets of minerals are formed and many of those stable at a higher degree of heat became subject to alteration as the temperature progressively moved lower.
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