The Rochester Mining District of Nevada

August 2017 by Chris Ralph

Only the richest ores could be worked and shipped off for processing at a profit. As a result, early mining in the southern part of the Humboldt Range was short-lived. In the 1880s, placers were discovered in Spring Valley and American Valley on the east side of the range...

Gangue Minerals - What Do They Tell Us?

January 2017
There are a large number of different kinds of gangue minerals, and each of them has its own tale to contribute to the story of the chemistry and geology of a deposit.

Alaska's Cripple Creek Mining District

November 2011
If developed with metal detecting in mind, this virgin ground could be a bonanza for nugget hunting.

Prospecting for Surface Flood Gold Placers on Low and Intermediate Gradient Streams

February 2015

Sample panning is a very important method used to find the richest parts of a flood gold deposit before setting up equipment and running material.

Round Mountain, Nevada

May 2014
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.

Gold Ores of the Delamar District, Nevada

August 2014
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.

Bedrock Gold: When It’s There and When It Isn’t

February 2018

Has your experience ever led you to wonder why some gold is deposited on bedrock and in crevices, while other gold is not? We’re going take a deeper look at this and see what we can figure it out.

The Wild Rush To Find More Cobalt—Part II

March 2018

In this second part on cobalt, I will take a look at the various types of cobalt deposits and how you can prospect for them. Who knows—perhaps the next big cobalt strike will be yours.

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