Prospecting & Detecting
Prospecting Hard Rock
March 2014 by Don Robinson
We panned out maybe three gold pans of the material and we were shocked at the gold that was there. This rock appeared to be rich.
A Break in the Weather
Back at the entry point of the mine, we took turns slowly crawling down the slope leading into the mine portal with our metal detectors, hard hats and flashlights. The mine was hand dug and is about 75 yards long.
Gold in Quartz
Because quartz and gold may be deposited together across a considerable range of temperatures, not all quartz veins are the same, and there are several different types of gold-quartz deposits.
Metal Detecting Old Hard Rock Mine Dumps
The type of mine dump that is best for metal detecting are the ones that consist of mixed sizes of rock and are located near some sort of excavation, commonly a shaft or adit. Sometimes the piles located along a trench dug by the miners can be productive as well.
Our Readers Say
• Prospecting for Diamonds in Kimberlite by W. Dan Hausel
• Miners referring to their activity as “recreational”
Following Clues to an Old Mill and Vein Strike
My last update on this adventure was in the April 2012 issue and involved our search for the northern extension of the Cedarberg Mine. At that time we had found it and we were in the process of returning for some detecting when Mother Nature struck with a late rain and snow storm.
Study Confirms Mercury Levels Safe in California's Gold Country
While the Water Board documented the selenium levels in fish and noted they exceed the levels of mercury, they have yet to acknowledge the numerous scientific studies that show selenium effectively neutralizes the effects of mercury.
Mining for Gemstones and Mineral Specimens
It is better in a gem and mineral mining operation that the driller, blaster and mucker be the same person in order to be able to predict placement of the desired mineral enriched pockets.
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