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History & Geology

Picks & Pans: Gold Recovery in Placer Mining Operations

Two of the major factors affecting the profitability of a placer mining enterprise are the relative efficiency of the mining equipment, and the rate and percentage of recovery obtained while conducting mining operations.

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The Silver Islet Mountains of Utah


Apparent fault offset.I set up my dry washer on the north side of the cut and sampled the bed rock and dumps around me. As I was only sampling, I ran for 20-30 minutes, shoveling from a variety of areas.

Strategic Metals—Part I


A bill was introduced and passed by the House of Representatives earlier this year that should make the exploration and opening of a mining operation faster and easier.

Alaska: Kodiak Islands Mineral Resources


The fresh material is worked and concentrated by the waves on the flat, wide beach platform. The waves wash away the lighter minerals, leaving the heavies near the bluffs and in depressions on the beach.

Preserving the True History of the Ivanhoe


My partner had the contacts and it wasn’t long before we had an agreement in place and the company had a geologist on site. I recall a time when he was getting the lay of the land, so to speak, and he broke off a rock sample and inspected it with his magnifier.

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The nugget sat there in plain sight, though it was covered in dirt, while hundreds of people had passed that way every day.

A Journey Into the Silver Peak Range


The Gold Rush in California called hundreds of thousands of souls to leave their homes to journey to the the far reaches of the West. At first the rich goldfields of the Sierra Nevada beckoned to these adventurous pioneers.

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For the prospector, knowing what oxidized hydrothermal alteration looks like in the field is an important exploration tool.

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