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...
The Montanore Copper and Silver Project
June 2015
This adit will be nearly 3.5 miles long when it reaches the ore zone.
This adit will be nearly 3.5 miles long when it reaches the ore zone.
Mining Battle Case Under Advisement
October 1999
Two weeks of sometimes-heated testimony have ended in a case that pits Cyprus Amax Minerals against opponents who want to prevent the company from mining ore from a central Colorado mountain.
Two weeks of sometimes-heated testimony have ended in a case that pits Cyprus Amax Minerals against opponents who want to prevent the company from mining ore from a central Colorado mountain.
Melman on Gold & Silver
August 2015
Next, all of silver’s chart action since mid-2011 has taken place under a declining trend line (dotted line), which has held for more than four years. Any trendline of that duration must be taken seriously.
Next, all of silver’s chart action since mid-2011 has taken place under a declining trend line (dotted line), which has held for more than four years. Any trendline of that duration must be taken seriously.
The Mexican Gold Belt
January 2006
Mexico is a large country, much larger than the state of Alaska. It is almost as long as the US is wide. It has climates that range from tropical rainforests in the south to barren deserts in the north. The Sierra Madre is a forested plateau that reaches elevations in excess of 10,000 feet. It parallels the west coast of the country.
Mexico is a large country, much larger than the state of Alaska. It is almost as long as the US is wide. It has climates that range from tropical rainforests in the south to barren deserts in the north. The Sierra Madre is a forested plateau that reaches elevations in excess of 10,000 feet. It parallels the west coast of the country.
Small-Scale Mining with a Dozer and Detectors
December 2007
Even the best of metal detectors are only capable of seeing a certain distance down into the sand, gravel and rock of a placer deposit. Once all the gold that can be reasonably seen by a metal detector has been harvested, it can be difficult to...
Even the best of metal detectors are only capable of seeing a certain distance down into the sand, gravel and rock of a placer deposit. Once all the gold that can be reasonably seen by a metal detector has been harvested, it can be difficult to...
The Spanish Silver of Mowry
August 2001
The Arizona mine and town that eventually became known as Mowry actually started with the discovery of a rich ledge of silver by either Spanish Jesuit priests or Spanish soldiers around 1736.
The Arizona mine and town that eventually became known as Mowry actually started with the discovery of a rich ledge of silver by either Spanish Jesuit priests or Spanish soldiers around 1736.
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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
