How does the mantle melt in the subduction zone?

In a subduction zone, an oceanic plate descends into the mantle beneath a continental or another oceanic plate, increasing pressure and temperature. The descending plate releases water and other volatiles into the overlying mantle, lowering its melting point. This process, known as flux melting, facilitates the formation of magma, which can rise to form volcanic arcs. Additionally, the heat generated by the friction and deformation of the subducting plate contributes to the melting of the surrounding mantle material.