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.
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 favorable geology of the northeastern and central parts of the Seven Troughs Range are the parts most interesting to prospectors. They are underlain by a thick sequence of Tertiary volcanic rocks, mostly rhyolites and andesites.
The truth is that cemented gravels are really not all that complex. There is no mystery of how gold grew there or somehow wormed its way into these solid gravels.
The historical AJ mine, located east of Juneau, Alaska, was considered the largest gold mine in the state at one time. Joe Juneau and Richard Harris struck gold there in 1880, and it has been more recently known as a tourist destination.
…if you are game for digging in and learning more about the intricate details of how gold deposits form, then let’s jump right in.
Copper is a critically important metal that we need to run our modern electronic society, and the long term outlook for this metal is for a steady increase in price.
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