a)Zinc is not one of the metal ores formed by contact metamorphism.
what is metamorphism?
The process of metamorphism involves changing the protolith, an existing rock, into a new rock with a different mineral composition or texture. The rock remains essentially solid throughout the metamorphism process, which happens at temperatures between 150 and 200 °C (300 and 400 °F), as well as frequently at high pressures or in the presence of chemically active fluids. Weathering and diagenesis, which are changes that occur at or near the Earth's surface, are not the same as metamorphism. Metamorphism can take many different forms, such as regional, contact, hydrothermal, shock, and dynamic metamorphism. The typical temperatures, pressures, and rates at which they occur, as well as the degree to which reactive fluids are involved, vary between these.
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