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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...Additional articles that might interest you...
The Bawl Mill
February 2004
• Stinks like limburger
• Auditors get audited
• Will you be able to afford to retire?
• The $200,000 crow
• Stinks like limburger
• Auditors get audited
• Will you be able to afford to retire?
• The $200,000 crow
The South Pass Gold Placers, Western Wyoming
April 2001
In the 1980s, I spent 5 summers living in a tent in order to map the 450 mi2 South Pass granite-greenstone belt and many of its historic mines. While mapping, I was quite impressed by the general lack of development of lode gold deposits.
In the 1980s, I spent 5 summers living in a tent in order to map the 450 mi2 South Pass granite-greenstone belt and many of its historic mines. While mapping, I was quite impressed by the general lack of development of lode gold deposits.
Eastern Arizona: Gold and Base Metal Deposits—Part I
February 2011
Arizona is well-known for its copper-gold porphyries and massive base metal-gold sulfide deposits such that primary gold deposits in the state are often overshadowed.
Arizona is well-known for its copper-gold porphyries and massive base metal-gold sulfide deposits such that primary gold deposits in the state are often overshadowed.
Oregon Miner Challenges Forest Service’s Authority to Regulate Mining
October 2009
Judging by news accounts, Tracy was doing exactly what H.R. 365, commonly referred to as the Mining Act of 1866, allows him to do.
Judging by news accounts, Tracy was doing exactly what H.R. 365, commonly referred to as the Mining Act of 1866, allows him to do.
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