[S-CG55] Oceanic plate as inputs to subduction zone and the subduction initiation

[SCG55-P05] Tectonic setting associated with the subduction initiation in the Western Pacific -The West Philippine Basin and Izu-Bonin-Mariana arc-

*Osamu Ishizuka¹, Rex N. Rex³, Taichi Sato¹, Gen Shimoda¹, Yumiko Harigane¹, Susumu Umino⁴, Izumi Sakamoto⁵, Yuka Yokoyama⁵, Koki Mori⁶, Kenichiro Tani⁷, Yasuhiko Ohara^8,2,9, Chris E. Conway¹ (1. Geological Survey of Japan, AIST, 2. JAMSTEC, 3. University of Southampton, 4. Kanazawa University, 5. Tokai University, 6. Chiba University, 7. National Museum of Nature and Science, 8. Hydrographic and Oceanographic Department of Japan, 9. Nagoya University)

Keywords:subduction initiation, seafloor spreading, arc, Philippine Sea Plate