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.

Critical Minerals: Tungsten

July 2017

Because tungsten minerals are heavy, exploration can be done using stream sediment samples. Prospectors looking for gold have found scheelite or wolframite in their placer concentrates, and in some cases this has led them to make important tungsten finds.

Picks & Pans: Gold Recovery in Placer Mining Operations

August 1999
Two of the major factors affecting the profitability of a placer mining enterprise are the relative efficiency of the mining equipment, and the rate and percentage of recovery obtained while conducting mining operations.

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.

The Ely Copper-Gold District of Nevada

January 2015
The main ore deposits of the Ely district are associated with an east-west belt of altered and mineralized rocks measuring about one mile wide that extends 8 miles westward from Ely.

Gold Refining In The Ancient World

March 2015

One thing that stood out for me is that Agricola was very specific about the type of metal or wood in the implements and vessels that were to be used.

Ancestral Yuba River Placer Gold Deposits

November 2020

The small-scale miner has reasonable opportunity to exploit some of these small, rich placer gold deposits. 

The Pearce Mineralized Area, Dragoon Mountains, Arizona—Part II

August 2013
There are many prospects within the known mineralized area and along the margins of the mineralized area that should be examined for gold and silver.

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