How PGMs Affect Assay Beads
September 2001 by Charles L. ButlerMost 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...
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...
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...
We (finally) have the new version of our website up and running, and it seems to be a hit!
If there is misleading wording anywhere, it will be in the sample data and in reserve/resource estimates.
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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