November 2018 by Matteo Oberto
The gravels in contact with the bedrock or false bedrock base are often the richest. The same facts apply to the alluvial paystreaks that are formed on gravel bars; the lowest level of the gold-bearing gravel is normally the richest.
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.
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.
When placer miners from the gold rush era began experimenting with the slope of their sluices, they must have pondered the ideal slope for trapping gold in a creek bed too. Logic suggests the same is true for streams...
Exploration for and prospecting in search of similar deposits should focus on rhyolite bodies located in fluorite-bearing areas.
While a large number of locations have yielded some placer gold, most of the state’s placer production has come from a few productive districts.
Only the famous Kennecott copper mine was able to continue operating through the Depression owing to the exceptional richness of its ore.
The most obvious benches are usually near the valley floor, but they can be thousands of feet above the valley floor. Since benches were made by streams, they can contain placer deposits.
The Bawl Mill • Ask The Experts - Skim Bar Placers article clarification • Ask The Experts - Is LR2000 working correctly? • Ask The Experts - What claim papers am I required to file at the county level? • Fall Drywashing—Just the Right Time of Year • Humble Beginnings • Understanding Large Gold Deposit Types: Discovering New Mines • Roads to Nowhere • Treasure Hunters Challenge FBI Over Dig for Civil War Gold • Out of the Ashes—New Access to Gold • Arizona Prospector Rescued from Mine Shaft • California State and US National Gold Panning Championships • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices