All Articles
Where To Find Diamonds
November 2008 by W. Dan Hausel
It is somewhat common for gold prospectors to find diamonds in black sand concentrates and not recognize them.
Additional articles that might interest you...
Paleoplacers in the Black Hills
September 2002
The Black Hills of western South Dakota are domal mountains that rise to 7,242 feet near Mt. Rushmore National Monument. Annual precipitation reaches 28 inches, enough to support winter sports and pine forests.
The Black Hills of western South Dakota are domal mountains that rise to 7,242 feet near Mt. Rushmore National Monument. Annual precipitation reaches 28 inches, enough to support winter sports and pine forests.
The Nome Goldfields
November 2006
Nome has a colorful history built on gold, where over 5 million ounces of the yellow metal has been dug up. Due to limited space, only a tiny fraction of this mining district can be touched upon. It would take volumes to cover all the information...
Nome has a colorful history built on gold, where over 5 million ounces of the yellow metal has been dug up. Due to limited space, only a tiny fraction of this mining district can be touched upon. It would take volumes to cover all the information...
Pocket Gold in Gneiss
March 2004
Metamorphic rocks such as gneiss and schist are known for their pocket gold deposits. Such pockets may not be large enough for major mining operations, but may be very rewarding for individuals or small companies. Gold-bearing quartz veins may cut gneiss or schist, but often the veins parallel the bedding, or foliation. The origin of mineralized veins, which parallel the foliation, has been kicked around for years.
Metamorphic rocks such as gneiss and schist are known for their pocket gold deposits. Such pockets may not be large enough for major mining operations, but may be very rewarding for individuals or small companies. Gold-bearing quartz veins may cut gneiss or schist, but often the veins parallel the bedding, or foliation. The origin of mineralized veins, which parallel the foliation, has been kicked around for years.
Placer Testing with Large Samples
June 2000
Of all the difficult gold placer sites to evaluate, none can compare with trying to dig to bedrock through twenty or thirty feet of soaked overburden through which water is slowly seeping downgrade.
Of all the difficult gold placer sites to evaluate, none can compare with trying to dig to bedrock through twenty or thirty feet of soaked overburden through which water is slowly seeping downgrade.
Metal Detecting Within the Cordillera for Gold Placers Associated With Tertiary Epithermal Ore Deposits
January 2001
This is a follow-up article to “Epithermal Ore Deposits...” published in the December 2000 issue. Related tables and maps were included with the previous article. If you did not receive the December issue you can still view the previously published maps on our web site by clicking on “January 2001 Featured Article.”—Editor
This is a follow-up article to “Epithermal Ore Deposits...” published in the December 2000 issue. Related tables and maps were included with the previous article. If you did not receive the December issue you can still view the previously published maps on our web site by clicking on “January 2001 Featured Article.”—Editor
Foreigners Lure Mining Partners
February 2000
There was a foreign presence at the annual Northwest Mining Association convention in December.
There was a foreign presence at the annual Northwest Mining Association convention in December.
Using A Trommel For Placer Processing
April 2010
The behavior of a trommel is dependent on how it is designed and set up. Important design characteristics include feed rates, screen perforation sizes, cylinder size, rotation speed and incline.
The behavior of a trommel is dependent on how it is designed and set up. Important design characteristics include feed rates, screen perforation sizes, cylinder size, rotation speed and incline.
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