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Platinum in Laccoliths
May 2003 by Edgar B. Heylmun, PhD
Laccoliths are unusual igneous features that seem to occur in the stable interior parts of continents. They are concordant igneous intrusions that have domed the overlying rocks and are circular in plan, and less than 10 miles in diameter. This article deals with some of the laccoliths found in the scenic Colorado Plateau province of Utah, Colorado, and Arizona...From The Editor: A Note to Our Readers and Advertisers
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Is there a reasonable and cost effective way to separate out the values?
Melman on Gold & Silver
Well, will wonders never cease!? It appears that Fed Chairman Alan Greenspan actually smiled when giving his most recent testimony to Congress. Actually, he was so upbeat that he carried the whole stock market with him—as well as others around the world. In fact, if there was one over-riding characteristic of the past month, it was the return of optimism over the economic future.
Tips and Tricks: A Dredging Tip for Clearing the Tailings Pile
After a short time, the tailings pile can get very large, and can actually block the downstream end of the sluice box.
43 CFR 3809 Final Rule
I’d like to send out a big “Thank You” to all of our readers who submitted comments regarding the proposed changes to the mining regulations. While we certainly didn’t get everything we asked for, we do have...
Kennecott Copper Mine, Kennecott, Alaska
For approximately 30 years, the mines produced good ore, some so rich it was simply sent straight to bagging, bypassing milling and loaded directly on the rail cars.
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