Which mechanism causes the generation of explosive andesitic volcanoes at subduction zones?

💡 Explanation

When a subducting plate descends, hydration-induced flux melting occurs because the release of water from the subducting plate lowers the mantle's melting point above, generating magma. Therefore, flux melting leads to andesitic volcanism, rather than plume upwelling, decompression, or fractional crystallization which produce other types of magma at disparate geodynamic settings.

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