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← GeographyWhich outcome occurs when a subducting plate hydrates mantle peridotite?
A)Decreased mantle melting point✓
B)Increased frequency of deep earthquakes
C)Faster plate boundary propagation
D)Reduced volcanic arc formation
💡 Explanation
A lower melting point occurs because the addition of water via the mechanism of flux melting lowers the solidus temperature of the mantle. Therefore, melting initiates at lower temperatures, rather than only at areas of high heat by decompression melting from uplift.
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