Prospecting & Detecting
Understanding Skim Bar Placers
September 2018 by Chris Ralph
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.
A Family Quest for Gold
Back at our campsite, while the rest of us grabbed a late four o’clock lunch, Fallyn volunteered to do the clean-up panning.
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.
Rediscovering Placerville, California
Several areas came to mind, but each was eliminated for one reason or another. One that seemed to be hanging on was the old historic mining town called Placerville.
The Subsurface Suction Dredge
The problems of the submersible dredge tube are addressed by the subsurface dredge, where the enclosed sluice recovery tube is suspended from a flotation assembly...
Critical Minerals: Titanium—Part II
There are both hard rock and beach sand types of titanium deposits, but the hard rock deposits need to be at least 10 percent titanium while the beach sands often are economic with only two or three percent titanium.
Tips and Tricks: A Dredging Tip for Clearing the Tailings Pile
After a short time, the tailings pile can get very large, and can actually block the downstream end of the sluice box.
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