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Prospecting & Detecting

Hidden Value in Old Tailings

The 15 rare earth elements were discovered long after the gold rush began to wane, but demand for them only took off over the past 10 years...

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Hunting Down Paystreaks


When I teach people about finding gold, I often explain that it is helpful to think of any river or stream that carries gold as being something like a sluice box.

Using Favorable Rock Types to Find More Gold


The more experienced prospectors know these lesser known spots are the types of places where big finds are still made.

Gold in the San Francisco District Oatman, Mohave County, Arizona


I suspect detailed geological mapping and prospecting would lead to discovery of one or more overlooked gold deposits in the district even though it has been heavily prospected in the past.

Understanding Skim Bar Placers


Perhaps the most notable thing about skim placers is that they form on the top surface of gravel bars, as opposed to coarser gold placers where the weight of the gold particles allows the gold to settle down on or near bedrock.

Tips and Tricks: Preparing Your Dredge Engine for Storage


From this I inferred that engine 2 had a carburetor problem. In this article, I discuss the specific engine/carburetor problem, and the surprising solution to this problem.

Detectors: Past, Present and Future


Detectors were invented long before I was born, but it was in the 1960s when they started to become an item popular enough to power a fledgling industry. The key development was miniature transistor technology replacing the old fashioned tube technology of the 1950s, making lightweight, affordable detectors possible.

Selecting A Low-Risk Region To Explore, Mine or Invest


“The evidence is clear—mineral deposits alone are not enough to attract precious commodity investment dollars...”

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