All Articles
Paleoplacers in the Black Hills
September 2002 by Edgar B. Heylmun, PhD
The Black Hills of western South Dakota are domal mountains that rise to 7,242 feet near Mt. Rushmore National Monument. Annual precipitation reaches 28 inches, enough to support winter sports and pine forests.
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New Mining Regulations in Maine
February 2014
Renewed interest in mining of gold, silver, copper and other metals in Aroostook County's Bald Mountain triggered 2012 legislation requiring the overhaul of the state's two-decade-old mining regulations.
Renewed interest in mining of gold, silver, copper and other metals in Aroostook County's Bald Mountain triggered 2012 legislation requiring the overhaul of the state's two-decade-old mining regulations.
Designing and Evaluating Placer Gold Recovery Plants
September 2014
For this article, I am focusing on industrial production plants that can handle 10 cubic yards per hour or more and would be fed by a loader or other heavy equipment...
For this article, I am focusing on industrial production plants that can handle 10 cubic yards per hour or more and would be fed by a loader or other heavy equipment...
Company Notes
July 2001
• Homestake Mining Company
• Cominco American Inc.
• Agnico-Eagle Mines Ltd.
• Homestake Mining Company
• Cominco American Inc.
• Agnico-Eagle Mines Ltd.
Legislative and Regulatory Update
August 2005
• BLM claim fees rise.
• Miners win in Karuk Tribe of California v. USFS
• BLM claim fees rise.
• Miners win in Karuk Tribe of California v. USFS
Using Microbes for Mining
December 2004
An innovative project enlisting bacteria for minerals recovery has drawn praise from researchers as it begins its second phase.
An innovative project enlisting bacteria for minerals recovery has drawn praise from researchers as it begins its second phase.
U.S. Dept. of Interior Inspectors in Arizona
March 2000
Glynn Burkhardt, president of the Arizona Small Mine Operators Association, has a small mine outside of Tucson, Arizona. He recently received a visit from U.S. Department of Interior...
Glynn Burkhardt, president of the Arizona Small Mine Operators Association, has a small mine outside of Tucson, Arizona. He recently received a visit from U.S. Department of Interior...
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