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...
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.
If developed with metal detecting in mind, this virgin ground could be a bonanza for nugget hunting.
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.
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.
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.
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.
The Bawl Mill • Ask The Experts: How would you go about evaluating a silver deposit? • Legislative and Regulatory Update • How to Make a Rock Sled for Dredging • More on Detecting Pocket Gold • Early Summer Mining in Wyoming • US Rare Earths: We Have & We Have Not • National Hall of Fame Names 2017 Inductees • EPA Reopens Comments on Pebble Project • Over the Divide: Wayne (Jerry) Keene 1934-2017 • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices