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History & Geology

Exploring Iron Oxide Copper Gold Deposits

The excitement over IOCG deposits began with the discovery of a monster deposit at Olympic Dam in Australia in 1976. The discovery was accidental as the operator was searching for strata-bound copper deposits.

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Gold Ores of the Delamar District, Nevada


Even as late as 1906, Delamar was second only to Tonopah and Goldfield in production outshining many better known areas. Since the first discoveries, more than 700,000 ounces of gold have been produced from the mines here.

The Paragenesis of Gold & Silver Deposits


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Nevada's Silver City Gold District—Part I


The name Silver City is quite ironic as it doesn’t really fit the area’s metal production. The area encompassing the Silver City district is a great, stand-alone gold district, where the production value of gold has been much more than that of silver. Since the initial discovery of gold-bearing veins in the mid-1850s, the area has been a center of continuous small and large-scale gold production.

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The Pearce Mineralized Area, Dragoon Mountains, Arizona—Part II


There are many prospects within the known mineralized area and along the margins of the mineralized area that should be examined for gold and silver.

Why Did This Silver Mine Close? - Pt III


Narrowing down a closure date will allow you to check the commodity price during that time and possibly confirm that a low price, rather than a lack of ore, was the driving force that closed the operation.

Conrey Dredge No. 4


The large buckets were favorable for the type of ground worked. The gravel was tenacious and compact, due to the existence of irregular pockets of clay.

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