All Articles
Placer Platinum
June 2004 by Edgar B. Heylmun, PhD
The platinum group metals (PGMs) are divided into three that are “light,” about the same atomic weight as silver, and three that are “heavy,” about the same atomic weight as gold. The three light PGMs are ruthenium, rhodium, and palladium, and the three heavy PGMs are osmium, iridium, and platinum.Ask the Experts
What to do with black sands
Flat-Fault Gold
Gold and other valuable metals are often deposited in breccia and rubble formed by flat or gently-dipping faults. Such faults are commonly found in areas of crustal stretching caused by the movement of tectonic plates. Flat-faults are especially common in southeast California, southern Arizona, and northern Sonora, Mexico. However, they can be present anywhere that crustal stretching has occurred.
Newmont Welcomes Release of Executives
Newmont Mining welcomed the release of five executives who were being detained in Indonesia over claims that the company polluted Buyat Bay in central Indonesia.
The "Rip-Roaring" Flood That Washed Out Mazuma, Nevada
Okay, now for the story of not only the Mazuma flash-flood, but also of early day happenings in the surrounding Seven Troughs area as related to me by Gloria’s (late) grandmother, Gommie. At this time (1953-1954) Gommie was in her late 60s and often reminisced regarding her early life in Iowa as a schoolteacher...
East Coast Dredger Heads West - Part II
I wandered back across the river, wading through the rapids and slipping at least three more times. I couldn’t believe how slick these rocks were! Once on the other side, I sat down for a few moments to review my plan of attack and lick my wounds.
The Douglas Creek Placer District, Medicine Bow Mountains, Southeastern Wyoming
It was July. The cool mountain air filtered the harsh Wyoming sun making the day fairly pleasant. Winter had finally receded, but an occasional drift hid in the shadows of the forest. I drove into the heart of the Medicine Bow National Forest...
Melman on Gold & Silver
One of our favorite lines can be attributed to former New York Yankee great Yogi Berra when he declared, “It’s deja vu all over again!” Well, during the past month, that seems to be the case as headline after headline has been recurring with amazing frequency.
Subscription Required:
The Bawl Mill
• Higher Copper Price Brings Hope, Jobs
• Zeballos Gold Camp, British Columbia
• Agreement Allows Pogo Mine to Resume Construction
• Treasure Hawk Mine Back in Action
• Oregon Dredgers Receive Threats From Environmentalists
• Understanding Hard Rock Mining: Terms and Methods—Part I
• Mood at Calgary Conference is Subdued, But Optomistic
• Reinventing the Wheel—The Infinity-Jet
• Company Notes
• Endangered Species Act is a Mess
• Here Come the MineBots
• Agency Gives Initial Backing to Kensington Mine
• Mining Stock Quotes and Mineral & Metal Prices
• Looking Back
• Melman on Gold & Silver
• Brits Thwart Robbery of Gold and Cash
