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History & Geology

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Sulfides and oxides—what's the difference between the two?

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Detector Brings New Life to An Old Lode Mine


…it was immediately evident the previous owner had not been using a detector. During just a few months of working the dumps part-time, he recovered gold in quartz specimens valued in excess of $40,000.

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Arizona is well-known for its copper-gold porphyries and massive base metal-gold sulfide deposits such that primary gold deposits in the state are often overshadowed.

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