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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 - Who owns this historic mill and how do I handle possible mercury contamination?
Ask the Experts—What is barite used for?
Q: Could you inform me as to what “barite” is used for? Where can I locate a company that mines barite?
Guest Editorial—Globalizing Mining in America, Part II
Defeating the Biodiversity Treaty
Company Notes
• Placer Dome
• Newmont Mining
• Homestake Mining Company
• Royal Gold Inc.
2002 Inductees to the National Mining Hall of Fame
Seven legendary figures of American mining will be enshrined in the National Mining Hall of Fame in ceremonies on Saturday, September 7, 2002, at The Little America Hotel in Salt Lake City, Utah.
VMS Deposits in Central Arizona
Volcanogenic Massive Sulfide (VMS) deposits in the Central Arizona Precambrian volcanic belt occur within a felsic package of volcanic rocks capped by an exhalite unit comprised of cherts, iron formations and siliceous members.
The Lengendary Lost Gold of the Headless Valley
Since 1906, when the McLeod brothers’ skeletal remains were first found tied to trees with missing heads, prospectors have been going into the Nahanni in search of elusive gold. A lot of those who lust for Nahanni gold have never been heard of or seen again.
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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
