Conrey Dredge No. 4—Part II

December 2017 by Don Madore

These were the men who periodically picked up the gold amalgam from the tables and sluices in the dredge, processed it, and transported the gold ingots to the railroad express office in Alder. Their trustworthiness must have commanded a prominent wage.

Ask the Experts: VMS ore

August 2012
Q: Are there any mills that handle VMS ore?

Prospecting for Diamonds

January 2013
Let’s take a look at diamonds and diamond mining and see how they form, how they are used beyond just jewelry, and what leads geologists to find diamond deposits.

The Seven Troughs Mining District

September 2016
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.

Enrichment of Mineral Deposits by Weathering—Part I

March 2016

The exact minerals formed in the concentrated supergene deposits depends much on the type of country rock around the deposit and the chemistry of the deposit itself, but if conditions are right, this process will form some rich patches of bonanza ore, in some places valued at thousands of dollars to the ton.

Strategic Metals—Part I

November 2013
A bill was introduced and passed by the House of Representatives earlier this year that should make the exploration and opening of a mining operation faster and easier.

Ask The Experts

July 2015
Q: Is there a correlation between fault zones and mineralization of economic metals?

The Heavy Minerals in Your Concentrates

June 2016
The fact that mineral deposits can contribute specific types of heavy minerals is why the analysis of the heavy mineral concentrates in the streams of an area can be an important prospecting technique for finding undiscovered mineral deposits.

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