History & Geology
Exploring Iron Oxide Copper Gold Deposits
November 2017 by Chris Ralph
The excitement over IOCG deposits began with the discovery of a monster deposit at Olympic Dam in Australia in 1976. The discovery was accidental as the operator was searching for strata-bound copper deposits.
Green Valley Gold District, Payson, Arizona

Ask the Experts: VMS ore
Q: Are there any mills that handle VMS ore?
Gold and Rare Earth Elements in New Mexico
We import nearly all of our REEs from China, so it’s critical that we find and continue to develop domestic resources of these elements.
Prospecting Homonyms

Mohave County, Arizona: The Oatman/San Francisco Mining District
The Oatman/San Francisco Mining District’s historic gold production of 2.2 million ounces of gold since the 1880s makes this area Arizona’s greatest primary gold producing district.
Prospecting for Surface Flood Gold Placers on Low and Intermediate Gradient Streams

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• The Beatty Mining District of Nevada
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Over the Divide: Nancy Glenn; Sondra (Adelson) Bernzweig