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Ask the Experts: VMS ore

Q: Are there any mills that handle VMS ore?

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Copper Deposits of Alaska


Only the famous Kennecott copper mine was able to continue operating through the Depression owing to the exceptional richness of its ore.

Gold in Tertiary Gravels


In some places, semi-continuous sections of riverbed can easily be linked in many places to identify the path of the ancient rivers.

PGMs in the United States


Until just recently, platinum-group metals (PGMs), especially palladium, had been holding their own on the market. But, Russia has now resumed shipments and it has brought prices down.

Enrichment of Mineral Deposits by Weathering—Part I


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.

Placer Gold Deposits of Utah


The placer deposits of Utah occur in two distinct types of environments. These are 1) placers found adjacent to, and derived from, gold, silver and base-metal deposits; and 2) placers found in major rivers and derived from unknown, distant sources.

Calcite and Limestone


The other distinguishing feature of calcite has to do with its chemistry. Geologists sometimes take a small bottle of dilute hydrochloric acid out into the field with them because calcite reacts with acids to make a bubbly foam.

The Birimian Greenstone Belts of West Africa


The country we were to visit was Burkina Faso, a small country about the same size of my home state of Nevada with about 10 times more people. The second day I was in Africa, we went out to the goldfields for the first time.

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