Japan Geoscience Union Meeting 2019

Presentation information

[J] Oral

U (Union ) » Union

[U-05] Large-scale Research Projects: Master Plan 2020 and its beyond

Mon. May 27, 2019 1:45 PM - 3:15 PM 101 (1F)

convener:Eiichi Tajika(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Shigeko Haruyama(Department of Environmental Science, Graduate School of Bioresouces,Mie University), Ryoichi Fujii(Research Organization of Information and Systems), Hodaka Kawahata(Atmosphere Ocean Research Institute, the University of Tokyo), Chairperson:Hodaka Kawahata, Eiichi Tajika

2:31 PM - 2:54 PM

[U05-09] Innovative 4D imaging of subduction-zones through real-time observatories, ultra-deep drilling and high-pressure experiments

★Invited Papers

*Masataka Kinoshita1, Naoshi Hirata1, Masanao Shinohara1, Tetsuo Irifune2, Hiroyuki Kagi7, Teruyuki Kato3, Shigeaki Ono4, Katsuyoshi Michibayashi6, Natsue Abe4, Fumio Inagaki4, Kentaro Omura5, Kazushige Obara1 (1.Earthquake Research Institute, University of Tokyo, 2.Ehime University, 3.Hot Springs Research Institute, 4.JAMSTEC, 5.NIED, 6.Nagoya Univ., 7.Geochemical Research Center, Univ. Tokyo)

Keywords:Seafloor cable network, Ultra-deep drilling, High pressure experiments, GNSS buoy, Subduction zone, Mantle rheology

In 2017, we submitted a proposal for the Masterplan for Advancing Major Academic Research, entitled “Earthquake and volcanic eruption prediction science through integrated onland, seafloor and ocean drilling observations -Challenge of the spatio-temporal informatics in subduction zones-“, to the Science Council of Japan. Here, we integrate this plan with the ocean-buoy GNSS observatory project and high-pressure (down to the mantle) experiments project to create a high-precision, time-lapse imaging around the subduction zones, in order to delineate the earthquake and volcanic eruption scenarios and eventually to predict the far fate of the Earth and ocean. For this purpose, we propose to construct a real-time observatory network for earthquake and crustal deformation monitoring through seafloor cables and GNSS buoys. We also propose to obtain (and try to reproduce) the state and property around the subduction zones and in the mantle, by means of ultra-deep drilling and ultra-high pressure experiments. We are extremely interested in the mantle rheology, which is primarily controlled by the thermal structure and the abundance in volatiles (e.g. water), which we believe is only possible by integration of geophysical observation and by ground-truthing, insitu experiments.