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Tantalum
July 1999 by Edgar B. Heylmun, PhD
Tantalum is a refractory metal which is non-toxic, ductile; easily fabricated, has a high melting point, is highly resistant to corrosion and is a good conductor of heat and electricity. It has the unique ability to transmit an alternating current in only one direction.Harshaw's Silver Days
In the Patagonia Mountains east of Nogales, Arizona, between the famed ruins of Mowry and the quaint old mining supply center town of Patagonia lies the remains of Harshaw, once a thriving mining camp in its own right.
Gangue Minerals - What Do They Tell Us?
There are a large number of different kinds of gangue minerals, and each of them has its own tale to contribute to the story of the chemistry and geology of a deposit.
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Aussie Gold—A Look at Queensland
Queensland produces about 25-28 tons of gold per year, which, while not in the same class as South Africa or North America, is still a respectable output.
Ask The Experts—Precious metals in water?
How can I determine if there are precious metals in the groundwater?
Ask The Experts—Where can I find information on the Abby mine?
Q: I would like to know where I can find information on the Abby mine located at Hildreth, CA.
Prospecting on Pickering Bar
On Saturday, January 27, 2007, six of us began a trip to Pickering Bar on the North Fork of the American River. It was 7:30 am and we had our engines running to begin the first leg of our two and a half hour trip to get there.
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