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The Fire Assay of Fly Eyes
July 2002 by Dr. Ralph E. Pray
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.Feds Order Closure of Idaho Mine
Federal safety inspectors have ordered one of the nation’s deepest underground mines closed in northern Idaho following an investigation prompted by a series of accidents that killed two miners over the last year.
Our Readers Say
Concerning assay comments...
Looking Back
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
California Wilderness Coalition and The Nature Conservancy Recruit Government Employees to Carry Out Huge Land Grab
US Geological Survey, US Forest Service, Bureau of Land Management, and California State Employees Attend Environmental Extremist Conference.
The Jenkins Mine Project Pt III -- Site Selection
This sampling program was painfully tedious, and I’ve still got the calluses and embedded shovel splinters to prove it. But completing that testing program validated certain areas of the creek and eliminated others.
Gold Prospecting for Better or Worse: Man vs Paydirt
As I laid in my Jeep and tried to get some rest, I began to realize how tired I was. I felt like a little kid who walked around Disneyland for 12 hours with his parents.
Companion Gold
Easing around the bedrock ledges and rock hopping, Terry and I came out into the open and were looking at a nice run of bedrock.
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• Our Readers Say
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• Company Looks at Restarting Sunshine Mine
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• Sons of Gwalia & Herbert Hoover
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• Prospecting on the Yukon River
• Placer Gold in Arizona
• Bill Could Create New Silver Market
• 2002 Inductees to the National Mining Hall of Fame
• Mining Stock Quotes and Mineral & Metal Prices
• Melman on Gold & Silver
• Mystery of Olmec Jade Solved
