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20 July, 03:21

What is the composition of magma

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  1. 20 July, 03:49
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    The initial composition of the magma is dictated by the composition of the source rock and the degree of partial melting. In general, melting of a mantle source (garnet peridotite) results in mafic/basaltic magmas. Melting of crustal sources yields more siliceous magmas.
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