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Prospecting for Copper—What to Look for on the Outcrop


For the prospector, knowing what oxidized hydrothermal alteration looks like in the field is an important exploration tool.

Our Readers Say


The Jenkins Mine Project, Conclusion—Recovery Operations & Summary


This project taught me that you don’t need to be Albert Einstein to apply a little science to your prospecting. I learned that most of the science related to suction dredging is actually common sense. All we need to do is take the time to apply it.

PLP Update


All 28 groups listed agree that Section 402 of the Clean Water Act does not apply and no dredge miner should be asking a state or federal agency for such a permit.

Understanding Rock Formations: Petrology for Prospectors


There are times when being able to recognize a type of rock can make you a much more successful prospector.

Hard Rock 101: Mechanical Techniques


Since we know that the secret to breaking rock is applying force from the inside out (putting tension on the rock), we will be looking at ways we can generate force using human and machine power.

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.

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Detectors: Past, Present and Future   • Mining Districts: A Short Review of Legal Authorities

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