June 2004 by Edgar B. Heylmun, PhDThe 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.
Melman on Gold & Silver
I believe gold and silver prices, to at least some extent, negatively mirror the society's confidence in the ability of government to continue providing economic and social services.
New ICMJ Website Almost Here
Mining in Sonora, Mexico
So you want to do some gold mining in Mexico. What do you need, where do you go, how do you begin? You begin before you even cross the border.
The Joy of Prospecting
I have been prospecting and mining for gold, both as a hobby and as an occupation, for nearly 30 years. From the deep green forests to the rolling sagebrush hills, few people see as much of America’s wide-open spaces as I do.
Underground Mining: Getting the Ore Out
Choosing the right method to move your ore and waste is all about making the right choices. Sometimes more than one method may be used during the life of a mine as an operation expands and grows.
Silver and Base Metal Deposits of the Pioche District
The areas that were mineralized with the bedded ore were huge and vast tonnages were indicated, although they had no idea at the time.
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