Which process causes the formation of a volcanic island arc along a subduction zone?

💡 Explanation

When an oceanic plate subducts, water is released from the subducting slab's hydrated minerals causing flux melting of the mantle wedge because water lowers the melting point of peridotite, generating magma that rises to form island arcs. Therefore flux melting results, rather than other melting processes that require different geological settings.

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