Which mechanism generates explosive volcanism at subduction zones?

💡 Explanation

When an oceanic plate subducts, water is introduced into the mantle wedge because hydrous minerals dehydrate, lowering the mantle's melting point and causing flux melting above the subducting slab, leading to magma generation. Therefore, water infiltration lowering melting point generates explosive volcanism, rather than mantle plume interaction, decompression melting, or assimilation, which operate under different tectonic regimes.

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