Thanks in advance! 1. How is peridotite melted at a divergent plate boundary wit

Question

Thanks in advance!

1. How is peridotite melted at a divergent plate boundary without changing the temperature?

            A. The Addiction of water during subduction would force melting.

            B. A mafic magma would form during the process.

C. A decrease in pressure would reduce the temperature at which minerals melt.

D. An increase in pressure would force melting to due the heat created.

2. The grain size of the minerals yields the formation environment.

            A. True

            B. False

3. Rock requires a higher temperature to melt at higher pressures?

            A. True

            B. False

4. Partial melting of a Basalt leads to _________ magmas. (Mafic Intermediate, Felsic)

5: What process might lead to change in magma composition at a subduction zone from mafic to intermediate?

A. Partial melting of the mantle

B. Assimilation of the country rock (continental crust)

C. Fractional Melting curves

D. Deposition of felsic minerals

Explanation / Answer

1) D

2) A

3) A

4) FELSIC

5) D

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