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19 July, 13:30

Which of the following statements are true about partial melting? Choose one or more:

A. As more of the rock melts during partial melting, the magma becomes more mafic than the original melt that formed.

B. Felsic components of the parent rock tend to go into the liquid state first during partial melting.

C. Partial melting results in magmas that are more felsic in composition than the parent rock.

D. Mafic components of the parent rock tend to go into the liquid state first during partial melting.

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  1. 19 July, 15:29
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    The correct answers are options A. "As more of the rock melts during partial melting, the magma becomes more mafic than the original melt that formed". B. "Felsic components of the parent rock tend to go into the liquid state first during partial melting". C. "Partial melting results in magmas that are more felsic in composition than the parent rock".

    Explanation:

    The concept of partial melting involves that not all the solid particles are converted into magma. The degree of partial melting affects the composition of magma, becoming more magic and less more siliceous the higher the degree of partial melting. The felsic to intermediate igneous rocks are the first components to be melted. In consequence, partial melting results in magmas that are more felsic in composition than the parent rock.
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