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.
...I would bet considerably more lode gold and silver remains to be found in this area, and there are possibilities for small placers and nugget shooting.
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.
In 1967, a local resident showed me a pouch of small gold nuggets and flakes. Several years later I asked the same person where that gold was found. He responded, “From the streambed below the old stamp mill at Apex.”
In this second part on cobalt, I will take a look at the various types of cobalt deposits and how you can prospect for them. Who knows—perhaps the next big cobalt strike will be yours.
Potholes in bedrock can trap placer minerals and even be glory holes. They are, at least, interesting geologic phenomena, and at best, a treasure trove of gold nuggets.
I set up my dry washer on the north side of the cut and sampled the bed rock and dumps around me. As I was only sampling, I ran for 20-30 minutes, shoveling from a variety of areas.
There is reason to believe these stream valleys are still rich with gold, silver and copper.
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts - How do I work this glacial deposit? • Ask The Experts - How do I best recover gold in pyrite? • It Pays to Know Your Bedrock • BLM Cancels 10-Million-Acre Sage Grouse Mineral Withdrawal • Take it to Bedrock • The Beatty Mining District of Nevada • Flood Plain Gold Deposits—What Are They Really? • Conrey Dredge No. 4 • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices