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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...
Picks & Pans: Working the Ol' Paystreak
November 2001
The bright yellow nugget caught my eye as I pulled the astroturf down the sluice box into the large plastic tub. I grabbed it from the mat, pretty much in shock because of its size.
The bright yellow nugget caught my eye as I pulled the astroturf down the sluice box into the large plastic tub. I grabbed it from the mat, pretty much in shock because of its size.
The Bawl Mill
November 2015
• Red tape at its finest...
• With the stroke of a pen
• Red tape at its finest...
• With the stroke of a pen
Placer PGMs in Alaska
January 2000
The state of Alaska is huge, over twice the size of Texas, with most of the population in just a few towns. The northern third of the state is north of the Arctic Circle, and vast regions are only sparsely populated.
The state of Alaska is huge, over twice the size of Texas, with most of the population in just a few towns. The northern third of the state is north of the Arctic Circle, and vast regions are only sparsely populated.
Looking Back
May 1999
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Ask the Experts
September 2013
Dust and dry washing
Dust and dry washing
The Fortymile Goldfields
March 2006
Having made nearly forty trips into this region over the years, the area has a tendency to draw the individual into its unique winding roads, which were once mining trails, where the creeks and rivers run to and fro across its twisted topography.
Having made nearly forty trips into this region over the years, the area has a tendency to draw the individual into its unique winding roads, which were once mining trails, where the creeks and rivers run to and fro across its twisted topography.
Ask The Experts
September 2015
Ore processing in California?
Ore processing in California?
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