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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.Legislative and Regulatory Update
• SB 637
• Public land users cry "fowl"
Ask the Experts
Q: Some of the terminology you use is way over my head and this might be the case for other beginning prospectors. What does “igneous” mean?
Ask The Experts
• Is there a standard contract for placer mining to use with a private property owner?
Carbonatites
Carbonatites are rocks that formed from molten calcite or dolomite. The thought of calcite being molten lava is difficult to accept, but it was confirmed when it poured out of a vent in Tanzania in 1960.
Melman on Gold & Silver
...we believe that these measures will also lead to diminished profitability, diminished tax revenues and, therefore, increasing calls for massive new economic stimulation which again, by historic standards, could well work to the benefit of the precious metals.
Guest Editorial—Globalizing Mining in America, Part I
Is it environmental concern that's driving mining out of the United States or rather politics on the grandest scale?
Higher Zinc Price Creates Opportunity
Zinc is brittle and crystalline at ordinary temperatures, but when heated to between 110°C and 150°C it becomes ductile and malleable; it can then be rolled into sheets. The bluish-white metal is used principally for galvanizing iron, but also...
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• Sons of Gwalia & Herbert Hoover
• Looking Back
• Prospecting on the Yukon River
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• 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
