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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.

Hard Rock 101: Micro Blasting


Micro blasting can be used to take down hanging rock, separate minerals from overburden, and collect gemstones and other high-value product with minimal damage.

A Data Miner Builds A Power Sluice


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How to Refine Silver—Pt I


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Augers can be used effectively for placer exploration with certain limitations.

Sampling, Hydro-Shocking & Cleaning Quartz-Gold Specimens


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Lode or Placer: What Difference Does It Make?


This explains the large difference in particle sizes between placers and hydrothermal lode deposits, but also means that while the mining may be similar in some cases, the sampling and recovery techniques are usually quite different.

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