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A Test Grid Dredged for Gold Values

The evaluation must also consider the gold fineness or purity. The purity of the Sugardaddy nuggets is estimated at 850 fineness, meaning 85% is gold (Au), 12% is silver (Ag) with 3% being other gangue alloyed metal.

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Proper Assaying of Placer Samples


The whole purpose of sampling mineralized ground is to measure the values in a small volume of material that would be representative of a much larger volume of similar material. The key word is representative. Chemical and fire assaying will not accurately represent placer deposits by themselves.

Crushing Quartz in Calaveras County: A Placer Miner Learns New Tricks


I had never run an impact mill before, but anything involving rocks, water and a big electric motor sounded great.

Exploring Placers with Auger Drills


Augers can be used effectively for placer exploration with certain limitations.

Gold Deposits of Montana


Historically, Montana has been an important gold producer, in terms of both lodes and placers, and it still produces gold for the prospector today.

Good Research and Bad Luck


With every look at the box I was pulling out a few pickers and a nugget or two. The smile I had the previous night just got bigger and bigger throughout the day.

The Seven Troughs Mining District


The favorable geology of the northeastern and central parts of the Seven Troughs Range are the parts most interesting to prospectors. They are underlain by a thick sequence of Tertiary volcanic rocks, mostly rhyolites and andesites.

Northwestern Alaska Mineral Resources


Gold and jade are actually only minor mineral resources for the Northwestern Alaska region as a whole. Modern prospecting has focused more on base metal than precious metal resources.

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