<M>Copper Group</M>. Copper was one of the first metals to be worked into implements and the first metal to be smelted from ores. Its excellent ductility and high conductivity assure its use in modern society.
Copper is a common element in many minerals and sometimes occurs in pure, native form. Most of the worlds copper comes from the minerals chalcopyrite and chalcocite. Chrysocolla and malachite also are mined for copper.
Copper: Copper mineral information and data. <M>Copper Group</M>. Copper was one of the first metals to be worked into implements and
Copper mining in Arizona, a state of the United States, has been a major industry since the 19th century. In 2007 Arizona was the leading copper-producing state in the US, producing 750 thousand metric tons of copper, worth a record $5.54 billion. Arizona's copper production was 60% of the total for the United States.
In nature, copper occurs in a variety of minerals, including native copper, copper sulfides such as chalcopyrite, Copper burial ornamentals from the 15th century have been uncovered, but the metal's commercial production did not start until the early 20th century. The cultural role of copper has been important, particularly in
The mines in the Keweenaw Peninsula in Michigan and the surrounding area (Houghton, Ontonagon, and Keweenaw Counties) produce the greatest abundance of the mineral Copper, and are the best-known locality of this mineral.
Copper is usually found in nature in association with sulfur. Pure copper metal is generally produced from a multistage process, beginning with the mining and concentrating of low-grade ores containing copper sulfide minerals, and followed by smelting and electrolytic refining to produce a pure copper cathode.
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 have been in contact with hydrothermal solutions; and as pore fillings and replacements in conglomerates that have been in contact with hydrothermal
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