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Basic Drywashing Principles
August 2001 by Jim Straight
Within the arid desert regions of the American Southwest and Western Australia, drywashers have proven to be a simple and inexpensive method for concentrating placer gold. Drywashers are not limited to desert operations...
Turning Acid Mine Drainage Into Drinking Water?—Grass Valley Company May Have the Answer
HPT Research recently tested their patented process for treating Acid Mine Drainage (AMD) on thousands of gallons of contaminated water at the Mammoth Mine.
BLM 3809 Final Rule Implications
Many readers of ICMJ have asked for more information regarding the BLM’s 3809 regulation changes that were pushed through just prior to the departure of the Clinton Administration.
Underground Mining: Stoping Methods
In an old mine that does not have stopes, you know the old miners did not take much if any ore out of that excavation. On the other hand, if you see large stopes within the mine you know that it is these places where the miners found profitable ore deposits within the vein.
Early Summer Mining in Wyoming
Old tailing piles extend for miles. There was still plenty of water flowing here, so WPA members set up highbankers at several settling ponds.
Evaluating a Placer Discovery
Gold mineralization is usually first noted in an area by examining material weathered from the source and liberated or washed downhill from it.
Specialized Equipment Available for Hire
Since we’ve already covered the basics of permitting a “Notice Level” mining operation, it’s time to talk actual mining.
Detecting in Australia's Etheridge Goldfield
This remote goldfield covers an area of over 13,000 square miles of the Savanna Gulf country of Far North Queensland, Australia.
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The Bawl Mill
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• The Public Process—Getting Involved and Making a Difference
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• USFS Roadless Comments Reopened
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• Fields of Gold
• Picks & Pans: All That Glitters Pans Out Well!
• De Beers Undergoes Overhaul
• Gold in Michigan
• Update on the West Mojave Desert Planning Area
• 2001 Inductees to the National Mining Hall of Fame
• Company Notes
• The Spanish Silver of Mowry
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
