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Picks & Pans: Dredging and Detecting in Sierra City
October 2003 by Chris Ralph
Every year for the past several years I have taken a prospecting trip to Sierra City, California, to dredge on a friend’s claim. Sierra City is a historic gold rush town of a little more than 200 persons. Known mostly for its rich lode mines, it also had...
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Ask the Experts - processing plants that can extract rare earth metals
April 2013
Q: Do you know of any processing plants that can extract rare earth metals?
Q: Do you know of any processing plants that can extract rare earth metals?
Picks & Pans: Detecting Micro-Nuggets
October 2005
Any detector specifically designed to respond to small gold will do. The best ones are the lightest ones with the smallest coils.
Any detector specifically designed to respond to small gold will do. The best ones are the lightest ones with the smallest coils.
The Bawl Mill
December 2013
• People in lead houses should not throw stones...
• The Anything-but-Affordable Care Act
• People in lead houses should not throw stones...
• The Anything-but-Affordable Care Act
The Fire Assay of Fly Eyes
July 2002
Colorado-Utah-Wyoming oil shale was first reliably discovered to contain gold and silver by the U.S. Bureau of Mines in the 1920s. Although most of this vast shale resource, up to 1,000 feet in thickness, contained nil or barely detectable values, many brown shale samples fire assayed here over the past thirty years have yielded up to 0.02 ounces per ton (opt) Au and 2.0 opt Ag.
Colorado-Utah-Wyoming oil shale was first reliably discovered to contain gold and silver by the U.S. Bureau of Mines in the 1920s. Although most of this vast shale resource, up to 1,000 feet in thickness, contained nil or barely detectable values, many brown shale samples fire assayed here over the past thirty years have yielded up to 0.02 ounces per ton (opt) Au and 2.0 opt Ag.
Oregon Miners Take DEQ to Court, Again
January 2011
Since 2005, a group representing a handful of Oregon and Washington mining organizations, centered around the Eastern Oregon Mining Association (EOMA) and the Waldo Mining District (WMD), have been actively fighting the Oregon Department of Environmental Quality (DEQ) over their then new “700PM Suction Dredge Mining Permit.”
Since 2005, a group representing a handful of Oregon and Washington mining organizations, centered around the Eastern Oregon Mining Association (EOMA) and the Waldo Mining District (WMD), have been actively fighting the Oregon Department of Environmental Quality (DEQ) over their then new “700PM Suction Dredge Mining Permit.”
The Smell of Gold -- Part II
July 2015
While mapping, I also found rock chips in the soil that were characteristic of the same wall rock alteration that occurs adjacent to the known lodes in the greenstone belt.
While mapping, I also found rock chips in the soil that were characteristic of the same wall rock alteration that occurs adjacent to the known lodes in the greenstone belt.
Huge Nugget To Be Auctioned
May 1999
A 56-pound (25-kilogram) nugget belonging to an Australian prospector is 80 percent to 90 percent high-purity gold, University of Southern California scientists confirmed recently.
A 56-pound (25-kilogram) nugget belonging to an Australian prospector is 80 percent to 90 percent high-purity gold, University of Southern California scientists confirmed recently.
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The Bawl Mill
• A Guide to Overlooked Gold Deposits—Part II
• Brighter Days Ahead Reports Nevada Mining Association
• Waldo Miners File Suit
• Roll-Front Uranium Deposits
• Deadly Storms May Expose Gems in Sri Lanka
• Hidden Features in Venezuela
• Dredging for Monazite in Idaho
• Gold in the Philippines
• 2003 California State Gold Panning Championships
• Judge Holds Companies Liable for Some Damage
• The Golden Highway—Tuolumne County
• Looking Back
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
