Quantifying the precise thermal structure of subduction zones is essential for understanding the nature of metamorphic dehydration reactions, arc volcanism, and intermediate depth seismicity. High resolution twodimensional (2-D) models have shown that the rheology of the mantle wedge plays a critical role and establishes strong temperature gradients in the slab. The influence of threedimensiona...

Hydrous arc magmas are produced when water-bearing materials from subducted oceanic plates transported to the mantle beneath volcanic arcs, though mechanism of mass transport remains debated. The geochemical characteristics slab component have important implications for thermal structures down-going and fluxes elements into deep mantle. If temperatures low, then elemental will be carried in a d...