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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.Additional articles that might interest you...
The Art of Finding Coarse Gold Part IV—Recovery of Coarse Gold From Alluvial Placers
March 2005
This last installment in the series will look at methods for finding and recovering coarse gold from alluvial (river and stream) placer environments. Unlike the residual and eluvial placers that we have considered previously, the force of flowing...
This last installment in the series will look at methods for finding and recovering coarse gold from alluvial (river and stream) placer environments. Unlike the residual and eluvial placers that we have considered previously, the force of flowing...
Nevada Gold Value Up Along With Production
July 2011
Nevada gold mines produced only about 6 percent more gold in 2010 than they did the year before, but the value of that gold was up a whopping 33 percent.
Nevada gold mines produced only about 6 percent more gold in 2010 than they did the year before, but the value of that gold was up a whopping 33 percent.
NAS Agrees to Review Superfund Science
June 2002
The National Academy of Sciences has taken a step toward reviewing a proposed cleanup plan in Idaho.
The National Academy of Sciences has taken a step toward reviewing a proposed cleanup plan in Idaho.
When Gold Moves, Placers Form
July 2010
What it takes to move gold is turbulent, fast-moving water. Normally the water is heavy with clay and all sorts of sentiments that have been ripped up from the bed of the river or carried down from the tributaries above.
What it takes to move gold is turbulent, fast-moving water. Normally the water is heavy with clay and all sorts of sentiments that have been ripped up from the bed of the river or carried down from the tributaries above.
The Business of Mines—Consider Your Tax Deductions Now
May 2007
Uncle Sam, the not-so-silent partner of every miner, dredger and prospector is willing, using our tax laws, to help reduce out-of-pocket expenditures necessary to acquire business assets and property. In addition to the well-known depreciation deduction, however, the tax laws permit tax write-offs for other, less tangible business assets. The best time to explore and lock-in many of these overlooked and misunderstood deductions is now, well before the end of the tax year.
Uncle Sam, the not-so-silent partner of every miner, dredger and prospector is willing, using our tax laws, to help reduce out-of-pocket expenditures necessary to acquire business assets and property. In addition to the well-known depreciation deduction, however, the tax laws permit tax write-offs for other, less tangible business assets. The best time to explore and lock-in many of these overlooked and misunderstood deductions is now, well before the end of the tax year.
Ask the Experts
January 2015
• Is the Spenceville Wildlife area open to prospecting?
• Is the Spenceville Wildlife area open to prospecting?
Global Warming—The Press Gets it Wrong, Our Report Doesn't Support the Kyoto Treaty
July 2001
The National Academy of Sciences released a report on climate change, prepared in response to a request from the White House, that was depicted in the press as an implicit endorsement of the Kyoto Protocol.
The National Academy of Sciences released a report on climate change, prepared in response to a request from the White House, that was depicted in the press as an implicit endorsement of the Kyoto Protocol.
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