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Workshop on Ocean Mantle Dynamics: from Spreading Center to Subduction Zone

更新日:20111102

(10月4日~6日 開催)

東京大学大気海洋研究所 共同利用研究集会

日    時:平成23年10月4日(火) 8:00~17:30
            10月5日(水) 8:30~17:30
            10月6日(木) 8:30~17:30
場    所:東京大学大気海洋研究所 講堂
       〒277-8564 千葉県柏市柏の葉 5-1-5 TEL 04-7136-6011
Organizing Committee:
       島 伸和(神戸大学、seama kobe-u.ac.jp)(Chair)
       Douglas A. Wiens(Washington University, USA)(Co-Chair)
       Alan D. Chave(Woods Hole Oceanographic Institution, USA)
       Douglas R. Toomey(University of Oregon, USA)
       Pascal Tarits(UBO ? IUEM, France)
       Wayne C. Crawford(Institut de Physique du Globe de Paris, France)
       John Chen(Peking University, China)
Local Organizing Committee:
       島 伸和(神戸大学)(Chair)
       沖野郷子(東京大学海洋研究所)(Co-Chair)
       高澤栄一(新潟大学)(Chief Field Trip Coordinator)
       森下知晃(金沢大学)(Field Trip Coordinator)
       道林克禎(静岡大学)(Field Trip Coordinator)
       澤口 隆(東洋大学)(Field Trip Coordinator)
       辻 健(京都大学)
       馬場聖至(東京大学地震研究所)
       一瀬建日(東京大学地震研究所)
大気海洋研対応者:沖野郷子(東京大学海洋研究所、okino aori.u-tokyo.ac.jp)
 

プログラム

10月4日(火)
8:00- Registration
8:50 - 12:15
Opening
Session 1: Structure of ocean lithosphere and asthenosphere
Shuichi Kodaira  Oceanic crust, mantle and Moho - new insights from active-source seismic study -
Catheline Rychert  Imaging the Lithosphere-Asthenosphere Boundary beneath the Pacific using SS Waveform Modeling
Hitoshi Kawakatsu  Seismological views on the oceanic asthenosphere and the LAB above
(Break)
Donald Forsyth  Surface wave studies of the evolution of the oceanic lithosphere and asthenosphere
Kiyoshi Baba  Variation in electrical conductivity of oceanic upper mantle with the lithospheric age
Viatcheslav Solomatov and Satoru Honda   Grain size evolution beneath the oceanic lithosphere and subducting slabs: Implications for seismology and geodynamics

(Lunch)

13:15 - 17:30
Ulrich Faul et al.  Lithospheric Structure from Combined Seismological and Experimental Models
Takashi Yoshino  Origin of lithosphere-asthenosphere boundary inferred from laboratory conductivity measurements
Shun-ichiro Karato  Partial melting at 410- and 70-km and the origin of the asthenosphere
(Break)
Questions and Discussions for Session 1

Session 2: Melt migration beneath the spreading axis to form oceanic crust
Yasuhiko Ohara  A Shinkai diving expedition to Godzilla Megamullion: geology of a dying backarc spreading segment

Short oral presentations for posters

10月5日(水)
8:30 - 11:45
Session 2: Melt migration beneath the spreading axis to form oceanic crust (continued)
Alan D. Chave  An overview of magnetotelluric sounding in active tectonic regimes: progress and prospects
Pascal Tarits  3-D imaging of the MELT mantle
Douglas R. Toomey  A New View of Mantle Flow, Melt Migration and Crustal Construction at the East Pacific Rise
(Break)
Wayne C. Crawford  Geophysical constraints on the magma feeding and structure of Lucky Strike segment and volcano, Mid Atlantic Ridge
Kyoko Okino  Oceanic detachments: implication for spacial and temporal variation of melt supply
Peter Michael  H2O Contents in MORB: Implications for Mantle Sources and Mantle Dynamics

(Lunch)

12:45-13:45
Poster session core time 1

13:45-17:30
Eiichi Takazawa  Formation and evolution of oceanic lithospheric mantle inferred from the Oman ophiolite
Eric Hellebrand  The Role of Inherited Depletion in the Oceanic Mantle: Direct Evidence from Abyssal Peridotites
Shiki Machida  Geochemical constraints on the rule of melt production along the Central Indian Ridge interacting with the Reunion hotspot
(Break)
Laurent Montesi  Melt Migration and Focusing at Mid-Ocean Ridges from Microscopic to Segment Scale

Questions and Discussions for Session 2

Session 3: Role of water especially for subduction and back-arc spreading dynamics
Hikaru Iwamori  Fluid processes in subduction zones and water subduction to deep mantle

19:00- Conference Dinner

10月6日(木)
8:30 - 11:45
Session 3: Role of water especially for subduction and back-arc spreading dynamics (continued)
Ikuo Katayama  Permeability anisotropy of serpentinite and fluid pathways in a subduction zone
Katherine Kelley  The influence of water on magma generation and mantle conditions beneath arcs and back-arc basins
Kenji Mibe  Electrical conductivity of Serpentinites and the Stability Fields of Aqueous Fluid, Silicate Melt, and Supercritical Fluid in Subduction Zones
(Break)
Dapeng Zhao  Seismic imaging of the Japan subduction zone
Junichi Nakajima  Seismic imaging of slab structure and its relation to seismicity
Takehi Isse et al.  Anisotropic structures of the upper mantle beneath the northern Philippine Sea region from Rayleigh and Love wave tomography

(Lunch)

12:45-13:45
Poster session core time 2
Taras Gerya  Initiation and origin of orthogonal oceanic spreading patterns (through Skype as a part of poster session)

13:45-17:30
Douglas A. Wiens  Seismological constraints on melt production, volatile cycling, and mantle flow in the Mariana island arc
Nobukazu Seama  Comparison among available electrical conductivity structural images beneath back-arc and mid-ocean ridge spreading centers
Teh-Ru Alex Song  Global Subducting Slab Entrainment of Oceanic Asthenosphere: Re-examination of Sub-Slab Shear-Wave Splitting Patterns
(Break)
Donna Blackman  Keynote on Modeling mantle flow in backarc wedge

Questions and Discussions for Session 3

Closing Remarks including announcement of InterRidge Student Prize

END of the meeting


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