The Goldfield Mining District, Nevada—Part II

July 2017 by Chris Ralph

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.

Ancient River Channels of Trinity County

June 2013
Trinity County is located in the far northwest corner of California and stirs up many different memories for those who have been there.

Glaciers and Placer Gold Deposits

November 2016
It also happens sometimes that glaciers will bury valuable placer deposits. This occurs when the glacier goes over the top of an existing placer deposit.

Ask The Experts

March 2015
Q: Is this gold or some other metal?

The Golden Streams of Butte County, California

May 2011
Even though these were some of the earliest placer deposits to be worked, there is still plenty of gold left today—it just takes more work to recover. Knowing about the old locations where gold has been found is the first step to success.

Ask The Experts

June 2015
Sulfides and oxides—what's the difference between the two?

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.

Prospecting for Diamonds in Kimberlite

January 2014
Kimberlite is very difficult for geologists to find, let alone prospectors and rock hounds. This is because kimberlite is rarely exposed on the surface and few people know how to identify the rock.

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