Question

Which of the following statements on mantle partial melting are correct?

• A. Shallow melting produces tholeiitic basalts.
• B. Low-degree melting produces alkaline basalts.
• C. Presence of $CO_2$-rich volatiles favors the formation of tholeiitic basalts.
• D. Presence of $H_2O$-rich volatiles favors the formation of alkaline basalts.

Answer 1

Answer: (A), (B)

Shallow melting produces tholeiitic basalts.

Answer 2

The Correct answer is (A) and (B): Shallow melting produces tholeiitic basalts. AND Low-degree melting produces alkaline basalts.