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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...
Golden Age of Gold Dredges
June 2002
Over one hundred years ago, gold mining in California saw a radically new method tried out in the major rivers of the Central Valley. Large gold dredges floated lazily but noisily on the waters, bringing up the rich gravel from deep below. With none of today’s environmental restrictions on such methods, the landscape was reworked into a maze of patterns along the rivers.
Over one hundred years ago, gold mining in California saw a radically new method tried out in the major rivers of the Central Valley. Large gold dredges floated lazily but noisily on the waters, bringing up the rich gravel from deep below. With none of today’s environmental restrictions on such methods, the landscape was reworked into a maze of patterns along the rivers.
Legislative and Regulatory Update
November 2012
• BLM to raise fees again
• Roadless Rule stands
• Suit filed over dredging restrictions in Washington State
• NWMA lends support
• California suction gold dredging lawsuits progressing
• BLM to raise fees again
• Roadless Rule stands
• Suit filed over dredging restrictions in Washington State
• NWMA lends support
• California suction gold dredging lawsuits progressing
The Guaniamo Diamond Region, Venezuela—Part I
July 2010
The considerable richness of the gravels is shown by the fact that operators have successfully worked the same river sections for over 20 years.
The considerable richness of the gravels is shown by the fact that operators have successfully worked the same river sections for over 20 years.
Gold From Black Sand Tailings
October 2011
The pile up on the small hill had to be a couple yards of black sand. I’m not one to ignore a little gold even if it is small in size—I have always believed that gold fever comes in all sizes.
The pile up on the small hill had to be a couple yards of black sand. I’m not one to ignore a little gold even if it is small in size—I have always believed that gold fever comes in all sizes.
The Basics of Geophysical Exploration
February 2012
In developing a mineral property or mining claims, one of the first goals is to identify and quantify valuable deposits. The classic method of doing this is by drilling holes into the ground to sample what is below the surface. The problem is that one or two holes usually are not going to tell you a whole lot...
In developing a mineral property or mining claims, one of the first goals is to identify and quantify valuable deposits. The classic method of doing this is by drilling holes into the ground to sample what is below the surface. The problem is that one or two holes usually are not going to tell you a whole lot...
The Bawl Mill
March 2011
• He can manage the taxpayers' money, but not his own?
• Government debt to reach yet another milestone...
• Speaking of ObamaCare...
• He can manage the taxpayers' money, but not his own?
• Government debt to reach yet another milestone...
• Speaking of ObamaCare...
A Search for Tantalum
July 2005
It is likely that few tourists passing through the crowning glory of the Canadian Rocky Mountains in northeastern British Columbia would be aware that this spectacular region is the focal point of the search for one of earth’s most intriguing metals—tantalum.
It is likely that few tourists passing through the crowning glory of the Canadian Rocky Mountains in northeastern British Columbia would be aware that this spectacular region is the focal point of the search for one of earth’s most intriguing metals—tantalum.
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