History & Geology
"Gold Rush: Alaska" in the Porcupine Mining District
June 2011 by Jim Halloran
![](/userfiles/images/201106/gold-rush-toc.jpg)
Eastern Arizona: Gold and Base Metal Deposits—Part I
![](http://icmj.com/userfiles/images/201102/hausel.jpg)
PGMs in the United States
![](http://www.icmj.com/userfiles/images/199908/TOC-pgms.jpg)
Prospector's Guide to Rock Breaking and Blasting
![](http://www.icmj.com/userfiles/images/201612/10-toc.jpg)
The Mysterious Telluride Minerals
…let’s dive in and take a closer look at these rich gold and silver-bearing minerals to find out what they are, where they form, and how to identify them.
Testing Ores for Free Gold
![](http://www.icmj.com/userfiles/images/201112/toc-testing-ores-for-free-gold.jpg)
California: The Land of Big Nuggets—Part II
There are a number of Tertiary river channels in the area, most of which trend south-southwest. They tend to be steep, narrow, and rich with coarse gold.
Ask The Experts
Sulfides and oxides—what's the difference between the two?
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