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Proper Assaying of Placer Samples


The whole purpose of sampling mineralized ground is to measure the values in a small volume of material that would be representative of a much larger volume of similar material. The key word is representative. Chemical and fire assaying will not accurately represent placer deposits by themselves.

Ask The Experts: What is a Spanish needle?


Some fellow in Texas was selling a Spanish needle—a dousing device used to recover minerals in the old days. Do you know anything about these?

Gold Deposits of the Ivory Coast


Ivory Coast has considerable gold reserves, and this nation has the largest area of greenstone belts prospective for gold in the continent.

Geologists Locate Giant Gemstones


W. Dan Hausel, Senior Economic Geologist with the Wyoming State Geological Survey (WSGS), has been successful at finding new mineral deposits and occurrences.

Colorado Disputes Key Part of EPA Mine Report


King’s letter is a blow to the EPA’s contention that outside technical experts supported its plan to push a drainage pipe through debris covering the entrance to the Gold King Mine…

Interview With A Coho Salmon


We’ve obtained the rights to publish this exclusive interview conducted on the Klamath River between David, an environmental activist, and a Coho salmon.

Detecting the Swiftshore Mine


Our group of six met in Foresthill, California, in mid-November. The weather was crisp, but not too cold. We had planned this trip on short notice and were all eager for the adventure ahead.

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The Bawl Mill   • Impact of Habitat Designations Grossly Underestimated   • Manslaughter Charges Dropped Against Sixteen to One Mine   • A Unique Prospecting Method   • Over the Divide   • Cripple Creek, Colorado   • Picks & Pans: Virginia Prospecting   • PLP Gets the Key!   • Mariposa, California   • The Ocampo District, Chihuahua   • The Collaboration   • Mud Creek Placer Mine   • Looking Back   • Melman on Gold & Silver

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