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Short title
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Geodynamics of off-arc volcanism
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Oral presentation
Date/Room/Chair
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May 23 PM1 (14:15 - 16:00)
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105
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Hitoshi Kawakatsu
/ Stephen Grand
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May 23 PM2 (16:15 - 18:00)
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105
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Hitoshi Kawakatsu
/ Thorsten Becker
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Poster presentation
Date/Room
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May 23 (Core Time 18:15 - 19:30)
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Convention Hall
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Contact
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Hitoshi Kawakatsu
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Email
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hitosi@eri.u-tokyo.ac.jp
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Convener
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Hitoshi Kawakatsu
/ Steve Grand
/ John Chen
/ Thorsten W. Becker
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Scope
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Deployments of large-scale, high-density seismic arrays around the world have started to reveal regional-scale, upper mantle structures with unprecedented detail. Such improved imaging is crucial to elucidating long-standing tectonic questions such as the links between surface tectonics and volcanism. For example, NECESSArray consists of 120 broadband stations deployed in northeast China (2009-2011). The region is known to display puzzling, Cenozoic intraplate and off-arc volcanism, but the relationship with the stagnant slab beneath the Japan Sea, if any, has been debated. Preliminary tomographic images from NECESSArray reveal an unexpected result; the absence of a long-tailed, stagnant slab beneath the chain of volcanoes, suggesting a possible link of volcanism either to the mantle transition zone, or the lower mantle. This finding opens a new discussion on the origin of off-arc volcanism and back-arc opening in the wider context of global geodynamics. We solicit contributions from geologists, petrologists, geochemists, geophysicists, geodynamicists, and seismologists working on related problems in the NW Pacific subduction zone and other similar, or contrasting, subduction zone settings world wide.
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Notes
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| Time |
Presentation No |
Title |
Author |
Presenter |
Abstract |
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Oral Presentation May 23 PM1 (14:15-16:00) 105 to the top
|
|
14:15 - 14:24
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introduction
|
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14:24 - 14:30
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3-min talk in an oral session@(SCG08-P01/SCG08-P02)
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|
14:30 - 14:45
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Invited
SCG08-01
|
Absence of stagnant slab: implication for volcanism, back-arc opening and trench migration
|
Masayuki Obayashi
Fenglin Niu
Junko Yoshimitsu
other
|
Masayuki Obayashi
|
|
|
14:45 - 15:00
|
SCG08-02
|
Deep mantle upwelling as the source of Changbaishan volcanism
|
Stephen Grand
Youcai Tang
Fenglin Niu
other
|
Stephen Grand
|
|
|
15:00 - 15:15
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SCG08-03
|
Absence of the Stagnant Slab beneath Northeast China Constrained by a Seismic Station in Mongolia
|
Nozomu Takeuchi
NECESSArray Project Team
|
Nozomu Takeuchi
|
|
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15:15 - 15:30
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SCG08-04
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Anisotropic structure of the upper mantle beneath the northeastern China from surface wave analysis
|
Takehi Isse
Hitoshi Kawakatsu
Satoru Tanaka
other
|
Takehi Isse
|
|
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15:30 - 15:45
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Invited
SCG08-05
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Seismic imaging of the mantle transition zone and lithosphere deformation beneath NE China
|
Fenglin Niu
Zheng Liu
John Y. Chen
other
|
Fenglin Niu
|
|
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15:45 - 16:00
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SCG08-06
|
New mantle tomography of East Asia: Insight into slab subduction and intraplate volcanism
|
Dapeng Zhao
Wei Wei
You Tian
other
|
Dapeng Zhao
|
|
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Oral Presentation May 23 PM2 (16:15-18:00) 105 to the top
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16:15 - 16:30
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Invited
SCG08-07
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Constraining the origin of the Yellowstone-Snake River Plain volcanic province using seismic imaging
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Richard Allen
Robert Porritt
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Richard Allen
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16:30 - 16:45
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Invited
SCG08-08
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Cenozoic off-arc volcanisms and mantle dynamics in eastern margin of Eurasian continent
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Tetsuya Sakuyama
Jun-Ichi Kimura
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Tetsuya Sakuyama
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16:45 - 17:00
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SCG08-09
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New insights into the Philippine Sea evolution: results from the recent Godzilla Megamullion study
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Yasuhiko OHARA
SNOW, Jonathan E.
MICHIBAYASHI, Katsuyoshi
other
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Yasuhiko OHARA
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17:00 - 17:15
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Invited
SCG08-10
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Divergent volcanic expression during subduction initiation: backarc spreading and boninite eruption
|
Wei Leng
Michael Gurnis
Paul Asimow
|
Wei Leng
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17:15 - 17:30
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SCG08-11
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Ascending flows in the Big Mantle Wedge (BMW) beneath northeast Asia induced by retreat and stagnation of subducted slab
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Masanori Kameyama
|
Masanori Kameyama
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17:30 - 17:45
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SCG08-12
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Off-arc volcanism in rollback subduction settings
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Thorsten Becker
Claudio Faccenna
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Thorsten Becker
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17:45 - 18:00
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SCG08-13
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Subduction zone dynamics controlled by the hot material next to the subducting slab
|
Satoru Honda
Alik Ismail-Zadeh
Manabu Morishige
other
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Satoru Honda
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| Presentation No |
Title |
Author |
Presenter |
Abstract |
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Poster Presentation May 23 Core Time (18:15-19:30) Convention Hall to the top
|
|
SCG08-P01
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Upper mantle rheology of Sea of Japan inferred from postseismic displacements of the Tohoku earthquake
|
Nikolai Shestakov
Mako Ohzono
Hiroaki Takahashi
other
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Nikolai Shestakov
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SCG08-P02
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Focal Mechanism Solutions of the Tohoku-Oki Earthquake Sequence and Their Geodynamical Implications
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Hongyu Yu
Kai Tao
Chen Cai
other
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Hongyu Yu
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