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					| Solid Earth Sciences(S) |  
					| Session Sub Category | Science of the Earth's Interior & Tectonophysics(IT) |  
					| Session ID | S-IT08 |  
					| Title | Structure and Dynamics of Suboceanic Mantle: Theories and Observations |  
					| Short title | Structure/Dynamics of Suboceanic Mantle |  
					| Convener | Name | Jun Korenaga |  
					| Affiliation | Department of Geology and Geophysics, Yale University |  
					| Co-convener 1. | Name | Hitoshi Kawakatsu |  
					| Affiliation | Earthquake Research Institute, University of Tokyo |  
					| Co-convener 2. | Name | James Gaherty |  
					| Affiliation | Lamont Doherty Earth Observatory, Columbia University |  
					| Co-convener 3. | Name | Kiyoshi Baba |  
					| Affiliation | Earthquake Research Institute, University of Tokyo |  
					| International Symposium | 'International Symposium' in addition to Scientific session. |  
					| Language | English |  
					| Scope | 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 of
 plate 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.
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					| Type of presentation | Oral and Poster presentation |  
					| Invited papers | Brian Kennett(Australian National University), Jim Gaherty(Lamont-Doherty Earth Observatory), Eric Debayle(ENS Lyon), Taras Gerya(ETH), Cecilia Cadio(Universite Montpellier), Hisashi Utada(ERI, University of Tokyo), Takehiko Hiraga(ERI, University of Tokyo), Naoto Hirano(Tohoku University) |  |