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Exploring Iron Oxide Copper Gold Deposits

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.

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The Rush to Treasure Hill


There were some exceptional times in the far-flung history of the West. Rich finds of minerals that set men’s souls ablaze. From the rich gold fields of California, men who arrived too late to find riches went searching in every direction. The trail that we will follow leads east, past the shining silver district of the Comstock Lode.

Know Your District


We have to remember that the earliest miners were not geologists, but came from a variety of backgrounds. Their survival depended on finding enough gold so they worked hard and adapted to whatever challenges these new areas presented.

Enrichment of Mineral Deposits by Weathering—Part II


While both zinc and lead deposits also are enriched by the surface weathering process, in part two we will look at the enrichment process for copper and also gold deposits, and at the interpretation of leached outcrops to figure how rich the concentrated deposits below them may be.

California's Mother Lode Quartz Veins


The actions of the hot, ore-bearing solutions are not limited only to the deposition of material within the walls of the fissures.

The Giant King Mine


Most gold-bearing veins in this region are controlled by fractures associated with the Melones Fault, a late Cretaceous structure that is 108 to 127 million years old.

Gold, Quartz & Chalcedony—Part II


The specific gravity of chalcedony is 2.58 to 2.64. This is slightly lower than coarsely crystalline quartz because of slight porosity in chalcedony. Being so light, it will easily wash out of a gold pan.

Placer Mining At Chititu Creek, Alaska


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

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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

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Over the Divide: Nancy Glenn; Sondra (Adelson) Bernzweig

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