*Chris Conway1, Nobuo Geshi1, Yumiko Harigane1, Genji Saito1, Akihiko Tomiya1 (1.Geological Survey of Japan)
convener:Teruki Oikawa(GSJ, National Institute of Advanced Industrial Science and Technology ), Takeshi Hasegawa(Department of Earth Sciences, College of Science, Ibaraki University), Daisuke MIURA(Department of Physical Science, Graduate School of Science, Osaka Prefecture University), Nobuo Geshi(Geological Survey of Japan, The National Institute of Advanced Industrial Science and Technology)