Magma and igneous rocks formed at subduction zones originate due to _______
A) decompression melting
B) fractional crystallization
C) addition of volatiles
D) loss of volatiles

Question

Quizplus · Accepted Answer

The addition of volatiles, such as water, lowers the melting point of rocks, making it easier for them to melt. At subduction zones, water is released from the subducting plate into the mantle wedge, producing a source of volatiles that can aid in the melting of mantle rocks to form magma. This type of melting is known as fluid-induced melting.

Magma and Igneous Rocks Formed at Subduction Zones Originate Due