Subduction Initiation Existed Along the Ancient Continent Margins? Evidence of U-Pb ages of zircons from the Bonin Trench, Japan

Yi-Bing Li, CAGS Chinese Academy of Geological Sciences, Institute of Geology, Beijing, China, Julian A. Pearce, Cardiff University, School of Earth & Ocean Sciences, Cardiff, United Kingdom, Jeffrey G. Ryan, University of South Florida, Department of Geology, Tampa FL, United States, Xian-Hua Li, Chinese Academy of Science, Institute of Geology and Geophysics, Beijing, China, Satoru Haraguchi, Japan Agency for Marine-Earth Science and Technology, Department of Solid Earth Geochemistry, Yokosuka, Japan, Tsuyoshi Iizuka, The University of Tokyo, Department of Earth and Planetary Science, Tokyo, Japan, Yoshiaki Kon, National Institute of Advanced Industrial Science and Technology, Institute for Geo-Resources and Environment, Tokyo, Japan, Shinji Yamamoto, Yokohama National University, Graduate School of Environment and Information Sciences, Yokohama, Japan, Yusuke Sawaki, The University of Tokyo, Graduate School of Arts and Sciences, Tokyo, Japan, Teruaki Ishii, Fukada Geological Institute, Tokyo, Japan and Shigenori Maruyama, Tokyo Institute of Technology, Department of Earth and Planetary Science, Tokyo, Japan