Prospecting & Detecting
Ask the Experts
February 2015 by Chris Ralph
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.
Finding Gold In The Cajon Pass
December 2022A Day Trip In Southern California
Selectable Frequency vs Multi Frequency Detectors
I like to think in terms of “conductive mass” because it is a combination of both the conductivity of the metal and the size of the target that determine how a detector sees conductivity.
ICMJ Visits Downieville, California
January 2023How to Stake Your Own Claim—Researching Mining Claims
Once you have determined that the land is locatable, the next step in the claim research process is to determine if the land has already been claimed by a previous locator.
Detecting the Fringe Areas
One prime example is an area that I have talked about in many of my articles. This is a very large area and I will actually describe its location again.
Determining The Optimal Crushing Size for Gravity Recovery
It’s not easy to figure out what is best without testing, and so a certain level of confusion has developed about how small the ore ought to be crushed.
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• Prospecting for Surface Flood Gold Placers on Low and Intermediate Gradient Streams
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