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Copper and Molybdenum Deposits in the United States
Copper and molybdenum resources were not recognized as valuable
commodities until economic needs demanded the collection and processing of these
minerals in large amounts. The most expansive deposits of copper and molybdenum
occur in massive low grade ores and are found in intrusive porphyry formations,
although many smaller sized but higher grade ores are located in non-porphyry
areas. The nation has abundant domestic copper ore reserves but because of many
detrimental economic factors much of the copper used by the U.S. industry is
imported. Molybdenum ore is profuse and exports of it are high to fulfill the
needs of foreign demand.
Copper was first used by people around 4000 B.C. in the manufacture of
tools because of its malleability and later became an important additive in
harder, more useful metals such as bronze (copper+tin; 2500 B.C.) and brass
(copper+zinc; 0 A.D.). The growth of copper production in the United......
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Title: Copper And Molybdenum Deposits In The United States
Approximate Word Count: 2538
Approximate Pages: 11 (250 words per double-spaced page)
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Copper And Molybdenum Deposits In The United States
Copper And Molybdenum Deposits In The United States. Copper and Molybdenum
Deposits in the United States Copper and molybdenum resources ... ... -
Asia
... resources include gold, silver, uranium, copper, lead, and ... modest petroleum and
natural-gas deposits are exploited ... China; sulfur, zinc, and molybdenum in Japan ... ...
