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Commercial Placer Mining With Jigs
August 2010 by Chris Ralph
During the upward stroke, water is pushed up through the shot layer causing it to open up and lifting the gravel particles above. The heavier particles settle faster based on Stokes law, and move down into the shot bed layer, while the lighter...
Finding Diamond Deposits With Your PC—Part II
As you search for cryptovolcanic structures in Colorado and Wyoming look to see if the anomaly has white soil. If the anomaly lies within a forest of pines, often the depression will occur in a distinct treeless area outlined by aspens and willows.
Papa's Got A Brand New Dredge!
It was time to prime the pump and start the engine! Dan’s priming method is to use a small, submersible, 12-volt pump. My priming method is to use a hand-operated diaphragm pump.
Roosevelt: From Boom Town to Mountain Lake
Roosevelt was a product of the Thunder Mountain boom, Idaho's last major gold rush.
Mining Benefits Everyone During Winter Months
Products from the mining industry contribute to winter safety and comfort for Nevada residents.
The Phoenix Gold Mine: A Brief History
The Phoenix Gold Mine is located approximately 7 miles south of Concord, North Carolina, and was discovered in about 1836, some 37 years following the first discovery of gold in the United States and a few years following the discovery of gold in quartz veins by Joseph Barringer.
Australia's First Gold Rush
Gold was found in California a few years before the first official finds were made in Australia. It was on February 12, 1851, that Edward Hammond Hargreaves flashed around specks of gold he’d found in nearby Lewis Ponds Creek and sparked the...
Looking Back
Excerpts from CMJ published 50 years ago this month.
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