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Cobalt and Nickel in Missouri
October 2002 by Edgar B. Heylmun, PhD
Cobalt and nickel are tough silver-white metals, with similar physical properties, that frequently occur together in nature, along with copper sulfides. Cobalt and nickel are used as alloys, providing great strength and resistance...
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China Will Put Rio Tinto Employees on Trial
March 2010
The Australian government confirmed it was notified that a Shanghai court will try the four Rio employees including an Australian national.
The Australian government confirmed it was notified that a Shanghai court will try the four Rio employees including an Australian national.
Basic Geology for the Independent Miner—Part V Geology of Hardrock Gold Deposits
May 2006
In this installment we will finish up our discussion of how primary hardrock gold deposits form. Understanding how rock alteration works can lead to some good ideas for exploring around old mining districts.
In this installment we will finish up our discussion of how primary hardrock gold deposits form. Understanding how rock alteration works can lead to some good ideas for exploring around old mining districts.
Guanajuato Silver, Mexico
August 1999
For 250 years, the Guanajuato Mining District of Mexico produced 20% of the world's silver. The old colonial city of Guanajuato (pop.100,000) is wedged in a narrow canyon in the Sierra de Guanajuato, at an average elevation of 6,750 feet.
For 250 years, the Guanajuato Mining District of Mexico produced 20% of the world's silver. The old colonial city of Guanajuato (pop.100,000) is wedged in a narrow canyon in the Sierra de Guanajuato, at an average elevation of 6,750 feet.
The Winning Hand
January 2017
The operation and techniques employed are highly successful in producing free gold with minimal work involved while maintaining an environment protection process through the use of recycled water and a settling pond.
The operation and techniques employed are highly successful in producing free gold with minimal work involved while maintaining an environment protection process through the use of recycled water and a settling pond.
Gold in Mono County, California
June 1999
Lode gold and silver mines and prospects can be found in many parts of Mono County, from the Sweetwater Mountains on the north to the White Mountains on the south, and at elevations ranging from 5,000 to 12,000 feet. Mining activity on the rugged east flank of the Sierra Nevada is now severely restricted, especially in resort areas and where lands adjoin Yosemite National Park.
Lode gold and silver mines and prospects can be found in many parts of Mono County, from the Sweetwater Mountains on the north to the White Mountains on the south, and at elevations ranging from 5,000 to 12,000 feet. Mining activity on the rugged east flank of the Sierra Nevada is now severely restricted, especially in resort areas and where lands adjoin Yosemite National Park.
Gold Ores of the Delamar District, Nevada
August 2014
Even as late as 1906, Delamar was second only to Tonopah and Goldfield in production outshining many better known areas. Since the first discoveries, more than 700,000 ounces of gold have been produced from the mines here.
Even as late as 1906, Delamar was second only to Tonopah and Goldfield in production outshining many better known areas. Since the first discoveries, more than 700,000 ounces of gold have been produced from the mines here.
Glaciers and Placer Gold Deposits
November 2016
It also happens sometimes that glaciers will bury valuable placer deposits. This occurs when the glacier goes over the top of an existing placer deposit.
It also happens sometimes that glaciers will bury valuable placer deposits. This occurs when the glacier goes over the top of an existing placer deposit.
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