History & Geology
Eastern Arizona: Gold and Base Metal Deposits Part II
March 2011 by W. Dan Hausel
In this review of precious and base metal deposits in Arizona, it is apparent that several significant mines and mineral deposits occur in eastern Arizona, and there is considerable potential for new discoveries.Critical Metals: Lithium
Prospecting for lithium deposits can take a number of different directions, because this metal can be extracted from a variety of geologically differnet sources.
Gold Refining In The Ancient World
California: The Land of Big Nuggets—Part I
The nugget sat there in plain sight, though it was covered in dirt, while hundreds of people had passed that way every day.
Exploring and Mining for Uranium
For a time uranium was more popular with prospectors than gold, but this is no longer true, and it has been decades since it was common to see individuals armed with Geiger counters out in the field.
The Significance of Nuggets in Placers
Chances are better that both types of gold did not come from the same source. Let's look at the probable conditions to cause two types of gold in a placer.
The Giant King Mine
Most gold-bearing veins in this region are controlled by fractures associated with the Melones Fault, a late Cretaceous structure that is 108 to 127 million years old.
Las Médulas—The Gem of the Roman Gold Mines
This mine was a real wonder of engineering, and the water supply and drifts had to be carefully managed to keep it in operation. In fact, it didn’t close due to lack of gold, but instead closed with the fall of the Roman Empire.
Subscription Required:
The Bawl Mill
• So You Want To Be A Full-Time Prospector?
• Ask The Experts—Do I still have rights to this mining claim?
• Ask The Experts—What is a "closed" claim?
• Rediscovering Placerville, California Part II
• Prospecting With The Help of Fluvial Geomorphology
• Oregon Anti-Dredging Bill
• Mud Men: Pocket Miners of Southwest Oregon Part II
• The Gold of Plumas de Oro
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
Free:
2011 Gold Prospecting & Mining Summit April 23-25 in Placerville
• Legislative and Regulatory Update
• Cue Resources Seeks Uranium in Paraguay
