In general,when rock is partially melted,the chemistry of the melt is
A) more mafic than the original chemistry of the rock that was partially melted.
B) more felsic than the original chemistry of the rock that was partially melted.
C) identical to the original chemistry of the rock that was partially melted.
D) completely unpredictable (it could be more mafic or more felsic).

Question

Quizplus · Accepted Answer

When rock is partially melted, the melt tends to be more felsic than the original rock. This is because felsic minerals (rich in silica and aluminum) have lower melting points compared to mafic minerals (rich in magnesium and iron), and thus they melt first, leading to a melt that is more felsic in composition.

In General,when Rock Is Partially Melted,the Chemistry of the Melt