What is/are thought to be the main mechanism(s) for generating basaltic melts from hot peridotite near its melting point in the upper mantle?
A) drop of confining pressure or introduction of water
B) frictional heating of basaltic ocean crust as it slides down subduction zones
C) intrusion of hotter solid mantle rocks from below
D) conductive heating of basaltic ocean crust subducted into the mantle

Question

Quizplus · Accepted Answer

The main mechanisms for generating basaltic melts from hot peridotite are a drop in confining pressure (decompression melting) or the introduction of water (flux melting), which lower the melting point of the peridotite.

What Is/are Thought to Be the Main Mechanism(s) for Generating