Commercial ore deposits are most likely associated with ________.
A) thick sandstones and shales
B) blueschists
C) evaporite sequences
D) igneous rocks
Correct Answer:
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Q20: Smelting is a technique applied to _.
A)
Q21: Secondary enrichment creates concentrations of metals by
Q22: When would miners use an open pit
Q23: Consult the figure below.Which of these is
Q24: In magma chambers,sulfide ore minerals typically _.
A)
Q26: The high electrical conductivity associated with metallic
Q27: In what types of rocks are ore
Q28: Consult the figure below.In what kind of
Q29: Most metals used by society are obtained
Q30: Mineral-rich veins within plutons,deposited by hot groundwater
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