The Wild Rush to Find More Cobalt—Part I
February 2018 by Chris Ralph
While some future cobalt will come from recycling lithium batteries and other products, the coming huge need for cobalt is virtually a perfect storm of heavy demand and insufficient supply.
The majority of the gold produced in Goldfield has come from ores that are close enough to the surface to be oxidized by the air. This oxidized ore is normally a soft, shattered, earthy material usually stained yellow to brown by oxides of iron.
When I was a student in the College of Mines at the University of Utah, the Verde district was used as an exploration model for “submarine volcanogenic massive sulfide deposits.” So I looked forward to visiting this district and the town of Jerome in central Arizona in the spring of 2012.
Quiz yourself about the stream in figure 5. Based on your previous knowledge of where gold is found in a stream and in this article, where do you think you will find the most gold?
Chances are better that both types of gold did not come from the same source. Let's look at the probable conditions to cause two types of gold in a placer.
…there are loads of different copper minerals, but a large number of them form first in the ground as chalcopyrite and then through the effects of weathering are changed into other minerals like malachite, cuprite and chrysocolla.
Plumas County has a rich heritage of gold mining, much of it from placer deposits that can still be searched and panned today. Being at the far northern end of California’s famed Mother Lode, it is quite often overlooked by those searching for gold today—really a well-kept secret after all of these years!
The Bawl Mill • Our Readers Say • Ask The Experts - Help with an assay report • Ask The Experts - How do you ship uranium samples to a lab? • Legislative and Regulatory Update • The Hill of Gold • Bedrock Gold: When It’s There and When It Isn’t • A Primer on Bitcoin and Other Cryptocurrencies—Part II • Mass Wasting & Gold Deposits • The “Push” for Gold—The Great Nevada Adventure Continues • PLP and MMAC Update • The Black Diamond of the Forest • Follow the Line • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices