Melt Inclusions in Izu Arc Lavas: Examining Slab-Derived Contributions to Intra-Oceanic Arc Magmas and the Role of Volatiles in the Subduction Factory

Oregon State University, Corvallis OR

Investigators

Abstract

Via a Japanese, American, and European collaboration, this study will analyze major, trace and volatile elements (H2O, CO2, S, Cl, F) and B and H isotopic composition in melt inclusions and lavas from the Izu arc using petrographic, electron microprobe, ion microprobe and laser-ablation ICP-MS techniques. Melt inclusions will provide primary constraints on the major, trace and volatile element contents and boron and hydrogen isotope compositions of primitive Izu arc melts, and this data will test and constrain geochemical, petrological, geophysical and thermal models for subduction in this region, one of the MARGINS program selected study areas, and elsewhere.