Exploring Iron Oxide Copper Gold Deposits

November 2017 by Chris Ralph

The excitement over IOCG deposits began with the discovery of a monster deposit at Olympic Dam in Australia in 1976. The discovery was accidental as the operator was searching for strata-bound copper deposits.

Weathering, Erosion and Placers

April 2017
The big interest to prospectors thinking about the effect of erosion is not what might happen long into the future, but what they might find in the rivers later this summer when the water levels go down.

Placer Mining At Chititu Creek, Alaska

March 2015
There is reason to believe these stream valleys are still rich with gold, silver and copper.

Flood Plain Gold Deposits—What Are They Really?

November 2017

We just completed a trip to another river, and yes, there was definite movement and redistribution of gravels, and other prospectors have seen this as well.

Round Mountain, Nevada

May 2014
There are a number of veins in the disseminated mineralization, but the principle ones on Round Mountain are known as the Los Gazabo and the Keane.

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.

Kennecott Copper Mine, Kennecott, Alaska

October 2017

For approximately 30 years, the mines produced good ore, some so rich it was simply sent straight to bagging, bypassing milling and loaded directly on the rail cars.

Greenstone and Gold

September 2013
Contacts, faults and zones of weak rock are all places that can act as a pipeline to convey gold-bearing fluids, leading to valuable deposits.

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