History & Geology
Picks & Pans: Gold Recovery in Placer Mining Operations
August 1999 by Staff
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Gold in the San Francisco District Oatman, Mohave County, Arizona
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Simple Rules of Gold Geology: Comparing Epithermal and Mesothermal Deposits
Geology is a science of general tendencies with frequent exceptions, not one of hard and fast rules that are always true and never vary. For almost every well-accepted rule of gold deposits, I can point you to a number of important exceptions.
How to Recognize Hard Rock Gold Ores
I regularly get inquiries along the line of: “Hey, I found this rock, and I think it might be gold ore. How can I tell?” Prospectors are always on the lookout for gold-bearing rocks that may be the source of any nearby placer gold.
Iron Ores and Iron Mining
For more than 40 years, iron ore prices have been decided by private negotiations conducted between the largest of the iron miners and the largest steel producers. These two sides dominate both the spot and contract iron ore markets.
The Birimian Greenstone Belts of West Africa
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Montana’s Rosetta Stone: Discovering Mines In The Treasure State
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The Bawl Mill
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