Enhanced arc magmatic productivity of the Western Pacific island arcs deduced from gravity-derived arc crustal growth rates

Island arcs are postulated as the juvenile components that contribute to growth of continental crust. Growth rates arc crusts were previously computed using crustal thicknesses derived from seismic data. Consequently, oceanic island also constrained by limited data availability. This work presents first comparison gravity-derived magmatic Western Pacific arcs. We used statistical correlation between Bouguer anomalies and seismic-derived generate an empirical formula. The new formula was utilized estimate EGM2008 global gravity model. resulting employed compute western Philippine system. latest rate estimates show productivity arcs, which directly associated with Plate subduction, is significantly higher (28–60 km 3 /km/m.y). compared for other (12–25 /km/m.y), subduction lithospheres (i.e., Sea Plate; Caribbean Eurasia-South China slabs). attributed variation in ages subducting plates. Plate, being older, degrees serpentinization sediment cover, introduce more volatiles inducing robust partial melting mantle wedge.