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Greenstone Belts in Minnesota
August 2005 by Edgar B. Heylmun, PhD
Greenstone is a dark greenish-black basaltic rock which, along with chloritized schist, forms belts up to 50 miles wide in northern Minnesota, in rocks of Late Archean age. Most belts are 2.6 to 2.9 billion years old.Additional articles that might interest you...
Melman on Gold & Silver
March 2017
…Washington and America have never seen a flow of actions by a new President to match what Trump has done during his first three weeks, but those actions suggest two interpretations.
…Washington and America have never seen a flow of actions by a new President to match what Trump has done during his first three weeks, but those actions suggest two interpretations.
Melman on Gold & Silver
September 2005
Every financial writer enjoys a few moments of pleasure when one of his predictions is validated by the markets and your columnist is no exception.
Every financial writer enjoys a few moments of pleasure when one of his predictions is validated by the markets and your columnist is no exception.
Millsite Opinion Overturned!
November 2003
Interior Secretary Gale Norton approved the reversal of controversial millsite restrictions that were put in place by the Clinton administration.
Interior Secretary Gale Norton approved the reversal of controversial millsite restrictions that were put in place by the Clinton administration.
USFS Chief in Nevada
April 2000
USFS Chief Michael Dombeck held 2 invitation only meetings in February in Elko and Reno. Nye County commission chairman Dick Carver was present at the Reno meeting, along with Bob Hadfield, executive director of the Nevada Association of Counties, and John Fallon of the Cattlemen's Association.
USFS Chief Michael Dombeck held 2 invitation only meetings in February in Elko and Reno. Nye County commission chairman Dick Carver was present at the Reno meeting, along with Bob Hadfield, executive director of the Nevada Association of Counties, and John Fallon of the Cattlemen's Association.
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.
Melman on Gold & Silver
February 2006
Well, another year, another pile of worries. First, just as it appeared that real progress was being made in finding a solution to the seemingly intractable situation between Israel and the Palestinian people...
Well, another year, another pile of worries. First, just as it appeared that real progress was being made in finding a solution to the seemingly intractable situation between Israel and the Palestinian people...
Ask the Experts
April 2014
Bismuth oxide for assaying?
Bismuth oxide for assaying?
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