All Articles
How PGMs Affect Assay Beads
September 2001 by Charles L. Butler
Most fire assayers are trained to observe the cupelled beads very carefully, noting any discoloring or surface roughness that might indicate that one or more of the platinum group metals (PGMs) are present. The “clues and tests” I have included in this article stem from several sources, including my 35 years of experience performing torch assays...Additional articles that might interest you...
Sluicing on Bedrock
November 2002
My head nearly scraped the caribou horns that hung above the doorway of the old tarpaper cabin I would call home for a few days. The cabin was originally built in the early 1930s and had been dragged about 200 yards across the valley to...
My head nearly scraped the caribou horns that hung above the doorway of the old tarpaper cabin I would call home for a few days. The cabin was originally built in the early 1930s and had been dragged about 200 yards across the valley to...
Copper is King in Arizona
July 2005
After 11 years of delays, the US Department of Interior approved a land exchange that will allow Phelps Dodge to proceed with development of the Dos Pobres/San Juan copper deposits...
After 11 years of delays, the US Department of Interior approved a land exchange that will allow Phelps Dodge to proceed with development of the Dos Pobres/San Juan copper deposits...
From The Editor
April 2009
We (finally) have the new version of our website up and running, and it seems to be a hit!
We (finally) have the new version of our website up and running, and it seems to be a hit!
How to Field Evaluate A Placer Property
January 2015
If there is misleading wording anywhere, it will be in the sample data and in reserve/resource estimates.
If there is misleading wording anywhere, it will be in the sample data and in reserve/resource estimates.
Under the Guise of Environmental Protection—EPA Revealed
October 2000
On August 24, 1999, a federal grand jury in Milwaukee indicted two EPA officials on charges of perjury, obstruction of justice, and conspiracy to obstruct justice.
On August 24, 1999, a federal grand jury in Milwaukee indicted two EPA officials on charges of perjury, obstruction of justice, and conspiracy to obstruct justice.
Governors Focus on Aid for Laid-off Miners
September 1999
Keeping a health clinic in San Manuel operating was among key concerns the governor, state lawmakers and union officials addressed in a meeting about assisting laid-off copper miners.
Keeping a health clinic in San Manuel operating was among key concerns the governor, state lawmakers and union officials addressed in a meeting about assisting laid-off copper miners.
Newmont Steps Up For Laid Off Workers
October 2008
Newmont Mining Corp. covered the final uncashed paychecks of workers who were laid off in August from the Jerritt Canyon Mine by another mining outfit.
Newmont Mining Corp. covered the final uncashed paychecks of workers who were laid off in August from the Jerritt Canyon Mine by another mining outfit.
Subscription Required:
The Bawl Mill
• A True Endangered Species
• Guest Editorial—Vertical Disintegration
• USGS Reports Increase of Imported Minerals
• The San Juan Mountains, Colorado
• A Silver Opportunity
• Gold in Virginia
• Picks & Pans: DEF Prospectors Rally Was a Huge Success
• News From GATA
• Our Nugget Shooting Adventure
• Fly Fishing the Mine Tailings/Headwaters of the Clark Fork, Montana
• Company Notes
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
