Copper Education - Minnesota And Flambeau Comparisons, Ore Sulfide Bodies

What is Copper?Native copper is an element and a mineral. It is found in the oxidized zones of copper deposits; in hydrothermal veins; in the cavities of basalt that has been in contact with hydrothermal solutions; and as pore fillings and replacements in conglomerates that have been in contact with hydrothermal solutions. It is rarely found in large quantities, thus it is seldom the primary target of a mining operation. Most copper produced is extracted from sulfide deposits.

An Overview of Cu-Ni Deposits in Minnesota:
A Geological Perspective: Jim Miller
Department of Geological Sciences
Precambrian Research Center University of Minnesota Duluth

Observed Results From The Flambeau Copper Mine

Results show consistent sulfate levels below Wild Rice Standard In Minnesota

Sulfur Levels Much Lower In Minnesota Ores.

Source:Copper and Nickel Mining in Minnesota University Of Minnesota - Duluth

Flambeau Reclaimed: A Success Story