Japan Geoscience Union Meeting 2016

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Oral

Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS17] Paleoclimatology and paleoceanography

Mon. May 23, 2016 1:45 PM - 3:15 PM A04 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Tomohisa Irino(Faculty of Environmental Earth Science, Hokkaido University), Minoru Ikehara(Center for Advanced Marine Core Research, Kochi University), Akira Oka(Atmosphere and Ocean Research Institute, The University of Tokyo), Yusuke Okazaki(Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University), Ikuko Kitaba(Research Centre for Palaleoclimatology, Ritsumeikan University), Akihisa Kitamura(Institute of Geosciences, Faculty of Science, Shizuoka University), Masaki Sano(Research Institute for Humanity and Nature), Ryuji Tada(Department of Earth and Planetary Science, Graduate School of Science, The Univeristy of Tokyo), Takeshi Nakagawa(Ritsumeikan University), Akira Hayashida(Department of Environmental Systems Science, Doshisha University), Chair:Tomohisa Irino(Faculty of Environmental Earth Science, Hokkaido University)

2:00 PM - 2:15 PM

[MIS17-02] Marine tephras in cores obtained by IODP Expedition 346: Stratigraphy, chronology and correlation

*Ken Ikehara1, Yasufumi Satoguchi2, Yoshitaka Nagahashi3, Naomi Nakazawa3 (1.Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology, 2.Lake Biwa Museum, 3.Fukushima University)

Keywords:tephra, IODP, stratigraphy

Mary tephra beds are intercalated in marine sediment sequences around the Japanese islands. During IODP Expedition 346, the sediment cores were obtained from 7 sites in the Japan Sea and 2 sites from the northern East China Sea. Many tephra beds are observed in the cores from these sites. Several tephras were correlated to the age-known widespread tephras in Pliocene-Quaternary age, and some were used for inter-core and inter-site correlation. Results clearly indicate the importance of marine tephra study for establishing stratigraphy, chronology and correlation.