All Articles
The San Juan Mountains, Colorado
September 2001 by Edgar B. Heylmun, PhD
The rugged San Juan Mountains of Colorado rise to 14,309 feet and were a barrier to overland travel for many years. Precipitation, in the form of summer thundershowers and heavy winter snow, is enough to support coniferous forests.
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Finding Gold With Copper and Turquoise
August 2009
The signs of copper, which the prospector most commonly sees in the field in outcrops and on the surface, are secondary minerals caused by the action of air and water on the original copper-bearing sulfides that were deposited deep...
The signs of copper, which the prospector most commonly sees in the field in outcrops and on the surface, are secondary minerals caused by the action of air and water on the original copper-bearing sulfides that were deposited deep...
Getting A Successful Start in Metal Detecting for Gold
March 2015
Once you have a detector, learn how to use it and get out in the field—you can’t find anything with it in your garage.
Once you have a detector, learn how to use it and get out in the field—you can’t find anything with it in your garage.
Mining Journal Contest
December 2008
How much is that old Mining Journal worth?
How much is that old Mining Journal worth?
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.
Melman on Gold & Silver
July 2009
It is becoming increasingly clear that Barack Obama will be an activist President. Unlike his predecessors, he appears set on using the powers of government in an unusually aggressive manner in order to accomplish “public good.”
It is becoming increasingly clear that Barack Obama will be an activist President. Unlike his predecessors, he appears set on using the powers of government in an unusually aggressive manner in order to accomplish “public good.”
Mongolia Tax May Chase Off Investment
June 2006
The gold and copper deposits at Oyu Tolgoi, or “Turquoise Hill,” are among the largest ever found and could give impoverished Mongolia its biggest boost since it abandoned communism 15 years ago—if the Mongolians can figure out how to profit from it.
The gold and copper deposits at Oyu Tolgoi, or “Turquoise Hill,” are among the largest ever found and could give impoverished Mongolia its biggest boost since it abandoned communism 15 years ago—if the Mongolians can figure out how to profit from it.
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July 2002
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