All Articles
The Trapiches of Chile
October 2000 by Dr. Ralph E. Pray
In Chile, the trapiche (tra-peach-ee) method of milling gold ore began more than 400 years ago. The first trapiche, also known as a Chilean mill, was a stone wheel weighing two or three tons rotating on an axle.Additional articles that might interest you...
Lluvia de Oro—A Shower of Gold Awaiting Development in the Sierra Madre—Part II
December 2008
Superintendent Tom Phillips soon returned to the mines with fellow worker Thomas J. Findlay, and began repair work. Phillips had already determined that the machinery had been operated at various times by armed forces...
Superintendent Tom Phillips soon returned to the mines with fellow worker Thomas J. Findlay, and began repair work. Phillips had already determined that the machinery had been operated at various times by armed forces...
Remote Mining Camps of Yuma County
October 2006
The remote desert of southwestern Arizona was an attraction only because of the gold and other minerals that were found there. Certainly the weather was not a draw! The early mining days were tough—the mines were a long way from supplies, and hostile Indians made travel in the area extremely dangerous.
The remote desert of southwestern Arizona was an attraction only because of the gold and other minerals that were found there. Certainly the weather was not a draw! The early mining days were tough—the mines were a long way from supplies, and hostile Indians made travel in the area extremely dangerous.
Mining Companies Use Conservative Valuations
January 2005
Gold mining companies are being conservative in asset valuations despite recent spikes in gold prices in terms of US dollars, according to a survey by PricewaterhouseCoopers.
Gold mining companies are being conservative in asset valuations despite recent spikes in gold prices in terms of US dollars, according to a survey by PricewaterhouseCoopers.
Researching and Staking Mining Claims—Part II
January 2007
Owning a mining claim is one of the greatest opportunities still available to American citizens. In last month’s article, we covered the basics of researching public lands and determining if the spot is open to claim.
Owning a mining claim is one of the greatest opportunities still available to American citizens. In last month’s article, we covered the basics of researching public lands and determining if the spot is open to claim.
Directory of Active Mines in Arizona Available
January 2003
The Arizona Department of Mines and Mineral Resources has released the Directory of Active Mines in Arizona, 2001-2002.
The Arizona Department of Mines and Mineral Resources has released the Directory of Active Mines in Arizona, 2001-2002.
Basic Information About Gold Detectors
July 2001
For those who rarely nuggetshoot, or are thinking about doing a little occasional nugget hunting, to buy a specialized gold detector may not be financially practical. Fortunately, a coin shooter with do-all capabilities, while it may not be as sensitive to sub-grain flakes, is satisfactory for many nugget hunting situations, especially if a smaller accessory coil is used.
For those who rarely nuggetshoot, or are thinking about doing a little occasional nugget hunting, to buy a specialized gold detector may not be financially practical. Fortunately, a coin shooter with do-all capabilities, while it may not be as sensitive to sub-grain flakes, is satisfactory for many nugget hunting situations, especially if a smaller accessory coil is used.
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The Bawl Mill
• A Word from the Editor
• Under the Guise of Environmental Protection—EPA Revealed
• The Centennial Lode and the Centennial Ridge District, Wyoming
• Company Notes
• Picks & Pans—In Search of Nome Creek Gold
• Massive Sulfide Deposits in Oregon
• Recreational Dredging on the South Yuba River
• Tales of Liberty Gold
• Drywashing Alluvial Placers
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
