Identify and describe one past geologic process that formed copper ore deposits.
Answers
Crystallization of the granite and forms as chalcopyrite
Explanation:
The world's major copper deposits are formed within the granitic porphyry copper style. Copper is enlightened by processes during crystallization of the granite and forms as chalcopyrite — a sulfide mineral, which is carried by with the granite.
Sometimes granites erodes to surface as volcanoes, and copper mineralization forms during this phase when the granite and volcanic rocks cool via hydrothermal circulation.
The high temperatures of volcanic magma creates hydrothermal veins, allowing some of the heat to escape near the upper layers of the Earth's crust. This is why copper is often found in the sedimentary layer, where sand and mud are compressed until they form a layer of sedimentary rock on the surface of the earth.
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Most nonrecycled supplies come from porphyry copper deposits (PCDs), which form when hot, metal-bearing fluids percolate up through Earth's crust. These fluids bubble up through the crust and collect in pores in the rock, where they sit, waiting for the final step that will allow them to form copper minerals.