All Articles
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...
Copper is King in Arizona
July 2005
After 11 years of delays, the US Department of Interior approved a land exchange that will allow Phelps Dodge to proceed with development of the Dos Pobres/San Juan copper deposits...
After 11 years of delays, the US Department of Interior approved a land exchange that will allow Phelps Dodge to proceed with development of the Dos Pobres/San Juan copper deposits...
Bedrock Gold: When It’s There and When It Isn’t
February 2018
Has your experience ever led you to wonder why some gold is deposited on bedrock and in crevices, while other gold is not? We’re going take a deeper look at this and see what we can figure it out.
Successful Rally for Suction Dredge Miners in Idaho
August 2014
Representative Paul Shepherd stopped by, and Idaho County Commissioner Jim Chmelik dove with one of the dredgers so he could see for himself that no harm was being done to fish or their habitat.
Representative Paul Shepherd stopped by, and Idaho County Commissioner Jim Chmelik dove with one of the dredgers so he could see for himself that no harm was being done to fish or their habitat.
10,000 Shovels Back Protest
March 2000
Gov. Kenny Guinn added his backing to a protest against the Forest Service in Elko as an estimated 10,000 shovels arrived in Nevada in a show of support from loggers, ranchers and miners across the country.
Gov. Kenny Guinn added his backing to a protest against the Forest Service in Elko as an estimated 10,000 shovels arrived in Nevada in a show of support from loggers, ranchers and miners across the country.
How to Properly Ground Balance to Find the Most Gold
August 2010
Many new detector operators and even some experienced ones don’t pay enough attention to keeping their detectors in proper balance. The result is false targets as well as incessant chirping and chatter.
Many new detector operators and even some experienced ones don’t pay enough attention to keeping their detectors in proper balance. The result is false targets as well as incessant chirping and chatter.
Hardrock Prospecting in El Dorado County, California
September 2010
Three times we went back and finally found a clue. There was an old air shaft not far from the trail!
Three times we went back and finally found a clue. There was an old air shaft not far from the trail!
Mine Woes Could Mean Higher Taxes
March 1999
Hard times for the copper industry could cost property owners in Grant County.
Hard times for the copper industry could cost property owners in Grant County.
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The Bawl Mill
• Our Readers Say
• The Paradox Basin—Part II
• A Sleeping Giant
• Buying a Used Gold Dredge
• Looking Back
• Gold in Vermont
• Picks & Pans: Prospecting on Perry Creek
• 9th Circuit Court Hears Pilgrim Family Case
• The First Mine in America
• National Mining Hall of Fame to Induct Five
• Melman on Gold & Silver
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