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...Discovery of the Mountain Pass REO Deposit
How does one go about discovering a rare earth oxide (REO) deposit when he is not familiar with the rare and unusual rocks and minerals that are found in such deposits? That was the case at Mountain Pass, California, yet the deposit was eventually discovered and mined.
Ask The Experts
Gold deposits and outer space
Lluvia de Oro— A Shower of Gold Awaiting Development in the Sierra Madre—Part I
In the silver belt of the Sierra Madre, the Lluvia de Oro was a discovery of gold, found not by the Spaniards of yore, but from an observant Indian a little over a century ago.
Ask The Experts: Could you expand on your previous blasting article?
Q: Could you write more about the last two methods that you mentioned—the expanding chemical mixtures and the micro blasters, how and when to use them, and when not to use them?
MMAC & PLP Update
We definitely got their undivided attention with our presentations. As a direct result of our presentations, the Desert Advisory Council recommended a Memorandum of Understanding be put together between the council and the Rand Mining District. This MOU was recently completed.
Mining Districts: A Short Review of Legal Authorities
Mining Districts are the private regulatory authority granted by Congress recognized to regulate the mineral lands held by the United States and for the disposal to citizens of the United States, by means of development and potentially perfected by patent.
MMAC Update
This will provide the opportunity to meet with many of the members of Congress in a more informal setting at several meetings, luncheons and dinners. And we have been offered the chance to meet with President Trump’s staff.
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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
