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History & Geology

Greenstone and Gold

Contacts, faults and zones of weak rock are all places that can act as a pipeline to convey gold-bearing fluids, leading to valuable deposits.

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The Ups and Downs of Geologic Faults


Faults are fractures, breaks and broken zones in the Earth’s crust where one side of the break has moved relative to the other, and they come in many different varieties.

The Tombstone Silver-Lead District, Arizona


In 1877, a prospector named Ed Schieffelin discovered silver in “the middle of nowhere” and staked two claims: “Tumbstone” and “Graveyard.” Soon a town and mining district were organized and acquired the name “Tombstone” after making a spelling correction.

The Birimian Greenstone Belts of West Africa


The country we were to visit was Burkina Faso, a small country about the same size of my home state of Nevada with about 10 times more people. The second day I was in Africa, we went out to the goldfields for the first time.

Round Mountain, Nevada


There are a number of veins in the disseminated mineralization, but the principle ones on Round Mountain are known as the Los Gazabo and the Keane.

Prospecting for Copper Ores—Part II


Copper is a critically important metal that we need to run our modern electronic society, and the long term outlook for this metal is for a steady increase in price.

The Potholes—California’s Oldest Known Mining District


Every time we prospected here we found gold, sometimes some really coarse flakes, but no large nuggets (yet).

Why Haven't They Mined This Claim?


Improvements in mining equipment and techniques, along with a higher gold price, make many mining properties profitable today that may not have been in the past.

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