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Copper Porphyry
Porphyry copper deposits are copper ore bodies that are formed from hydrothermal fluids that originate from a voluminous magma chamber several kilometers below the deposit itself. Predating or associated with those fluids are vertical dikes of porphyritic intrusive rocks from which this deposit type derives its name. In later stages, circulating meteoric fluids may interact with the magmatic fluids. Successive envelopes of hydrothermal alteration typically enclose a core of disseminated ore minerals in often stockwork-forming hairline fractures and veins. Because of their large volume, porphyry orebodies can be economic from copper concentrations as low as 0.15% copper and can have economic amounts of by-products such as molybdenum, silver, and gold. In some mines, those metals are the main product. The first mining of low-grade copper porphyry deposits from large open pits coincided roughly with the introduction of steam shovels, the construction of railroads, and a surge in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morenci Mine 2012
Morenci is the name of some communities in the United States: * Morenci, Arizona * Morenci, Michigan Morenci is a city in Lenawee County in the U.S. state of Michigan. Sharing a southern boundary with the state of Ohio, it is the southernmost city in the state of Michigan. The population was 2,270 at the 2020 census. History The settlement of M ... {{geodis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
