Porphyry Copper and Related DepositsThe most commonly mined kind of copper deposit, porphyry copper, occurs mainly in magmatic, volcanic arc, and back-arc tectonic regions of plates alongside modern day or historic subduction zones (plate-convergence boundaries). As being a consequence, it is actually observed predominantly in regions these as alongside the western continental edges of North and South America (U.S. DOI, Bureau of Mines 1992). Key copper porphyry deposits may also be located in the southwestern United states of america, associated with big granitic intrusions.Copper porphyry deposits certainly are a style of disseminated mineral deposit, located dispersed all through tiny fractures in porphyritic felsic intrusives (granitic rocks with huge feldspar or quartz crystals within a finer matrix). By an not known process, intrusive granitic plutons are fractured into items as well as very small veins and pore fillings are stuffed with all the hydrothermal solutions, recementing the rock using the mineral-laden deposits. When the host rock is limestone, the resulting deposits are referred to as "skarn" deposits. Since the copper is so bodily dispersed, these ore deposits are regarded low-grade, requiring large-scale mining techniques (e.g., open up pit) (Press and Siever 1978).Porphyry copper deposits and their associated skarn, hydrothermal veins, and substitute breccia deposits were being the predominant class of deposits mined in 1989 (59 percent of total planet mining). These deposits made up ninety three % of your America copper mine ability in 1990 (U.S. DOI, Bureau of Mines 1992). The largest mines of the style in the United states of america are classified as the Morenci Mine, Arizona, and the Bingham Canyon Mine, Utah.
usine de concassage de pierre avec la capacite de 150-180 tph
equipement de concassage de pierre de 200-250tph
equipement de concassage de pierre avec la capacite de 250-300 tph
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