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

question 72

Multiple Choice

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

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