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Wall-Rock Alteration
April 2004 by Edgar B. Heylmun, PhD
Wall-rock (country rock) alteration is found in all hard-rock mining districts and has been caused by hydrothermal solutions in the past history of the region. The zones of alteration have a bearing on where one might drill for ore bodies. The weekend prospector does not have the tools nor knowledge to block out ore deposits, but he can narrow down his search dramatically by understanding the zones of wall-rock alteration that he sees.BLM Land Swap Deal Raises Eyebrows
The Bureau of Land Management (BLM) in Washington D.C. is reviewing a land swap with a private company because the bureau allowed an employee of the company to arrange the deal.
Record-Breaking Alaskan Nugget for Sale
Clay described working the placer claim with his D-6 in 1998, “when this big one just rolled....."
Mud Men: Pocket Miners of Southwest Oregon—Part I
Rocks and minerals associated with clay seam gold deposits in southern Oregon are often in sedimentary rock units at least partially metamorphosed into argillite. They are also associated with mafic volcanic rocks, basalts and gabbro that...
Tantalum
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.
Oregon Miners File Suit Against Fisheries Service
Eastern Oregon Mining Association members have filed a federal lawsuit against the National Marine Fisheries Service (NMFS) demanding that the agency provide biological opinions on any threat to wildlife or the environment so miners can begin working their claims.
The Bawl Mill
• House makes another withdrawl from your account
• Pot calling the kettle...
• A meal worth supersizing
Gold Near Boulder, Colorado
Several mining districts near Boulder, Colorado mark the northeast end of the 240-mile-Iong Colorado Mineral Belt, which cuts diagonally across the Rocky Mountains.
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