Prospecting & Detecting
Old Water Channels Provide Important Clues
May 2022 by Ray Mills
After washing the top sixty to ninety feet of gravel, the old- timers hit the bedrock. The bedrock paid one-eighth to one-half of an ounce to the square foot…
Commercial Placer Mining: Alaska Style
There are currently about 170 commercial-scale placer operations in Alaska. Most of these are small operations with just a few people working; they are often family affairs that operate seasonally only during favorable weather.
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...
Digging It Dry
I believe dry washing is an underappreciated prospecting method. There are plenty of places where there is some pretty decent gold to be had, but the spot is a long way from any water and dry processing may well be the best way to go.
Ask The Experts
Designing my own dredge...
Prospecting on the North Yuba
The research I did for “Gold in the Slate Creek Basin” (September 2011 issue) found me chasing a channel out of the LaPorte territory headed towards the old mining town of Brandy City, California.
Jim Madden's Gold
Maybe we could find a few pieces of ore from that tunnel? It was worth a try. The old timers didn’t have that stamp mill for looks, so we set off to get some samples.
Nice Specimen Gold Recovered in Northern California
Each specimen is carefully examined to determine if it would be beneficial or not to use an acid treatment to reveal more of the gold.
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• Mineralization, Ground Balance and Metal Detecting
• Gold Prospecting for Better or Worse: Warning Signs
• What To Do With All That Gold?
• Proposed 100-Mile Road in the Yentna Mining District
• All About Trommels and Screens for Placer Gold Recovery
• Judge Orders FBI to Produce Records on Civil War Gold Hunt
• Strategies for Detecting Heavily Pounded Areas—Pt II
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• The Mystery of the Grand Summit Mine
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