Japan Geoscience Union Meeting 2016

Session information

International Session (Oral)

Symbol S (Solid Earth Sciences) » S-IT Science of the Earth's Interior & Techtonophysics

[S-IT08] Structure and Dynamics of Suboceanic Mantle: Theories and Observations

Tue. May 24, 2016 3:30 PM - 5:00 PM 201A (2F)

Convener:*Jun Korenaga(Department of Geology and Geophysics, Yale University), Hitoshi Kawakatsu(Earthquake Research Institute, University of Tokyo), James Gaherty(Lamont Doherty Earth Observatory), Kiyoshi Baba(Earthquake Research Institute, University of Tokyo), Chair:Kiyoshi Baba(Earthquake Research Institute, University of Tokyo), Jun Korenaga(Department of Geology and Geophysics, Yale University)

The operation of plate tectonics is what makes the Earth a unique planet in the solar system, but why plate tectonics takes place is still unresolved, creating a considerable bottleneck in the theory of planetary evolution at large. A key to this long-standing question is believed to be in the suboceanic mantle, in particular its lithospheric and asthenospheric components, because the defining characteristic ofplate tectonics is the subduction of oceanic plates. Our understanding of the structure and dynamics of suboceanic mantle is, however, yet to be advanced to address the origin of plate tectonics. For example, it is still difficult to answer how strong oceanic plates actually are and what observations can possibly constraint it. In this session, we call for contributions from relevant disciplines including mantle dynamics,rock mechanics, marine geophysics, and global seismology, to discuss the status quo and explore new research directions. Given this exploratory nature, contributions with unusual angles (e.g., ones with only indirect connection, or proposals for innovative observation) are strongly encouraged.

4:45 PM - 5:00 PM

*Ken-ichi Hirauchi1, Kumi Fukushima2, Masanori Kido3, Jun Muto3, Atsushi Okamoto4 (1.Department of Geosciences, Faculty of Science, Shizuoka University, 2.Department of Science, Graduate School of Integrated Science and Technology, Shizuoka University, 3.Department of Earth Science, Graduate School of Science, Tohoku University, 4.Graduate School of Environmental Studies, Tohoku University)