Which mechanism causes increased crustal melting during oceanic plate subduction under continental crust?

💡 Explanation

When an oceanic plate subducts, hydrated minerals release water into the overlying mantle wedge because increased pressure overcomes the mineral's water-retention capacity, lowering the mantle's melting point and causing flux/fluid-induced melting. Therefore fluid-induced melting results, rather than decompression, radiometric, or tidal mechanism that require alternative tectonic settings.

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