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Short title
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Fluid and dynamic processes in forearc
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Oral presentation
Date/Room/Chair
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April 28 AM1 (09:00 - 10:45)
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414
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Simon Wallis
/ Ken-ichi Hirauchi
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April 28 AM2 (11:00 - 12:45)
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414
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Yoshihiro Hiramatsu
/ Tomoyuki Mizukami
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Poster presentation
Date/Room
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April 28 (Core Time 18:15 - 19:30)
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Poster
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Contact
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Simon Wallis
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Email
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swallis@eps.nagoya-u.ac.jp
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Convener
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Simon Wallis
/ Yoshihiro Hiramatsu
/ Ken-ichi Hirauchi
/ Tomoyuki Mizukami
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Scope
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Subduction brings oceanic crustal material into direct contact with the overlying mantle wedge. The subduction boundary changes its slip behaviour from seismic to aseismic with increasing depth. The deep forearc region around the tip of mantle wedge shows a transitional nature with episodic tremor and slip which are probably strongly influenced by sustained fluid flow. The amount of fluid release in the forearc is not well constrained but is thought to depend on the thermal structure of the subduction zone. Fluid released into the forearc mantle will cause a transformation of mantle rock to serpentinite. This metamorphic transformation implies a major volume change and a change in physical properties of the mantle. Despite considerable recent advances in understanding these processes, there is no good consensus on how strong this forearc region is likely to be or how fluids are transported. Such information is vital in developing more complete tectonic models of these geologically and geophysically important regions. In this session we aim to contribute to our understanding of the deep forearc by bringing together the results of a variety of different approaches including field based observations, experimental work, theoretical modeling and geophysical observations on deformation, reaction and physical properties in fluid-rock systems.
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Notes
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| Time |
Presentation No |
Title |
Author |
Presenter |
Abstract |
|
Oral Presentation April 28 AM1 (09:00-10:45) 414 to the top
|
|
09:00 - 09:25
|
Invited
SIT04-01
|
Thermal structure of the NE Japan-Hokkaido subduction system: The effects of 3-D slab geometry and oblique subduction
|
WADA, Ikuko
JIANGHENG, He
HASEGAWA, Akira
other
|
WADA, Ikuko
|
English
|
|
09:25 - 09:40
|
SIT04-02
|
Effects of a local deepening of slab-mantle decoupling depth on slab surface temperature
|
MORISHIGE, Manabu
VAN KEKEN, Peter E.
|
MORISHIGE, Manabu
|
English
|
|
09:40 - 10:05
|
Invited
SIT04-03
|
Thermal modeling associated with subduction of the Philippine Sea plate in southwest Japan
|
YOSHIOKA, Shoichi
JI, Yingfeng
MATSUMOTO, Takumi
|
YOSHIOKA, Shoichi
|
English
|
|
10:05 - 10:20
|
SIT04-04
|
Slab-wedge mantle boundary preserved in the Sanbagawa belt, SW Japan
|
WALLIS, Simon
MORI, Hiroshi
NAGAYA, Takayoshi
other
|
WALLIS, Simon
|
English
|
|
10:20 - 10:35
|
3-min talk in an oral session (SIT04-P01 / SIT04-P02 / SIT04-P03 /SIT04-P04 / SIT04-P05)
|
|
Oral Presentation April 28 AM2 (11:00-12:45) 414 to the top
|
|
11:00 - 11:25
|
Invited
SIT04-05
|
Phenomenology of Episodic Tremor and Slip
|
OBARA, Kazushige
|
OBARA, Kazushige
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English
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11:25 - 11:40
|
SIT04-06
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Enhancement of slow earthquakes by geometrical irregularity of subducting oceanic crust
|
KATO, Aitaro
OBARA, Kazushige
TAKEDA, Tetsuya
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KATO, Aitaro
|
English
|
|
11:40 - 12:05
|
Invited
SIT04-07
|
Deformation experiments on serpentinite at high PT conditions with implications for the mechanisms of slow earthquakes
|
OKAZAKI, Keishi
HIRTH, Greg
PROCTOR, Brooks
other
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OKAZAKI, Keishi
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English
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12:05 - 12:20
|
SIT04-08
|
Metasomatic fault-zone weakening of subduction plate boundary faults
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HIRAUCHI, Ken-ichi
SPIERS, Christopher
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HIRAUCHI, Ken-ichi
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English
|
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12:20 - 12:45
|
Invited
SIT04-09
|
Coupled mass transport and serpentinization at crust/mantle boundary: Insights from hydrothermal experiments
|
OKAMOTO, Atsushi
OYANAGI, Ryosuke
TSUCHIYA, Noriyoshi
|
OKAMOTO, Atsushi
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English
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| Presentation No |
Title |
Author |
Presenter |
Abstract |
|
Poster Presentation April 28 Core Time (18:15-19:30) Poster to the top
|
|
SIT04-P01
|
Saline fluids recorded in jadeitites in subduction-zone melanges of southwest Japan
|
MORI, Yasushi
SHIGENO, Miki
KAWAMOTO, Tatsuhiko
other
|
MORI, Yasushi
|
English
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SIT04-P02
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Serpentinite structure above subduction surface: Analysis of a natural example in Sanbagawa metamorphic belt
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MIZUKAMI, Tomoyuki
SODA, Yusuke
YOKOYAMA, Hironori
other
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MIZUKAMI, Tomoyuki
|
English
|
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SIT04-P03
|
Awaruite in serpentinites from Oshima Peninsula, Fukui Prefecture, Japan
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YAMAGUCHI, Kai
UEHARA, Seiichiro
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YAMAGUCHI, Kai
|
English
|
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SIT04-P04
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Antigorite CPO measured by U-stage, EBSD and synchrotron X-rays
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SODA, Yusuke
ANDO, Jun-ichi
URATA, Yoshito
other
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SODA, Yusuke
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English
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SIT04-P05
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Olivine CPO in non-deformed peridotite due to topotactic replacement of antigorite
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NAGAYA, Takayoshi
WALLIS, Simon
KOBAYASHI, Hiroaki
other
|
WALLIS, Simon
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English
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SIT04-P06
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Cr-rich olivine in deserpentinized peridotite and its implication
|
ENDO, Shunsuke
|
ENDO, Shunsuke
|
English
|
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SIT04-P07
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Spatial variation in scale length of deep low-frequency tremor inferred from duration-amplitude scaling in western Shiko
|
HORINO, Kazuki
HIRAMATSU, Yoshihiro
MIZUKAMI, Tomoyuki
other
|
HORINO, Kazuki
|
English
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