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Short title
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Continental crust and Project IBM
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Oral presentation
Date/Room/Chair
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May 22 PM1 (14:15 - 16:00)
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101B
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Yoshihiko Tamura
/ Osamu Ishizuka
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May 22 PM2 (16:15 - 18:00)
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101B
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Alexander Nichols
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Poster presentation
Date/Room
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May 22 (Core Time 18:15 - 19:30)
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Convention Hall
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Contact
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Yoshihiko Tamura
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Email
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tamuray@jamstec.go.jp
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Convener
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Yoshihiko Tamura
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Scope
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Key questions for comprehending arc crust formation are: (1) What is the nature of the crust and mantle in the region prior to the beginning of subduction? (2) How does subduction initiate and initial arc crust form? (3) What are the spatial changes of arc magma and crust composition of the entire arc? (4) How do the middle arc crust evolve? This session aimed to gather a wide range of geophysicists, geologists, geochemists and petrologists who are interested in the nature and evolution of arc crust and how this is modified in collision zones and preserved in continental crust. IODP has Project IBM proposals to drill at the IBM, including three non-riser holes (IBM-1, IBM-2 and IBM-3) and one riser, ultra-deep hole (IBM-4). The total four drillings should result in comprehensive understanding of the arc evolution and continental crust formation. JR drilling at three sites (IBM-1, IBM-2 and IBM-3) is scheduled in 2014 from 31 March to 23 September, six months in total. Ultra-deep drilling (IBM-4) is now in OTF and its drilling will be discussed in the Chikyu workshop in April, 2013. Genesis of continental crust will be tackled from both a land-based study and a sea-based study.
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Notes
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| Time |
Presentation No |
Title |
Author |
Presenter |
Abstract |
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Oral Presentation May 22 PM1 (14:15-16:00) 101B to the top
|
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14:15 - 14:30
|
Invited
SCG10-01
|
Seismological evidences showing along arc variation of crust and mantle evolution in the Izu-Bonin arc
|
Shuichi Kodaira
Narumi Takahashi
Koichiro Obana
other
|
Shuichi Kodaira
|
|
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14:30 - 14:45
|
Invited
SCG10-02
|
Pattern of fluid release from the subducting slab at the IBM margin
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Ikuko Wada
|
Ikuko Wada
|
|
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14:45 - 15:00
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Invited
SCG10-03
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Uranium-series evidence for variations in subduction components along the Izu volcanic arc
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Heye Freymuth
Tim Elliott
Yoshihiko Tamura
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Heye Freymuth
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15:00 - 15:15
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SCG10-04
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Evidence from melt inclusions for magmas stalling at mid-crustal depths
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Alexander Nichols
Yoshihiko Tamura
Robert Stern
other
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Alexander Nichols
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15:15 - 15:30
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SCG10-05
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A tale of two magmas: Contrasting MORB-Boninite reaction trends in IBM forearc moho transition zone
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Matthew Loocke
Jonathan E. Snow
Osamu Ishizuka
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Matthew Loocke
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15:30 - 15:45
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SCG10-06
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Various arc magmas from a common plate slab: Sources and genetic conditions of the coexisting alkali basalts, sub-alkali
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Jun-Ichi Kimura
Atsushi Kamei
Junichi Nakajima
other
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Jun-Ichi Kimura
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15:45 - 16:00
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SCG10-07
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Forming continental crust: Density sorting in subducted arcs
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Peter Kelemen
Mark D. Behn
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Peter Kelemen
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Oral Presentation May 22 PM2 (16:15-18:00) 101B to the top
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16:15 - 16:30
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Invited
SCG10-08
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Origin of the proto-Philippine Sea Plate and the discovery of Mesozoic basement beneath the northern Izu-Bonin Arc
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Kenichiro Tani
Osamu Ishizuka
Hayato Ueda
other
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Kenichiro Tani
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16:30 - 16:45
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Invited
SCG10-09
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Temporal variation of OIB-like magmatism in the Western Philippine Sea-link to spreading of the West Philippine Basin-
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Osamu Ishizuka
Rex N. Taylor
Yasuhiko Ohara
other
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Osamu Ishizuka
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16:45 - 17:00
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SCG10-10
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Why we need drill deep into the oceanic arc crust?
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Yoshihiko Tamura
Yoshiyuki Tatsumi
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Yoshihiko Tamura
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17:00 - 17:15
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3-min talk in an oral session@(SCG10-P03/SCG10-P04/SCG10-P05)
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| Presentation No |
Title |
Author |
Presenter |
Abstract |
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Poster Presentation May 22 Core Time (18:15-19:30) Convention Hall to the top
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Invited
SCG10-P01
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Temperature of primary magma from Sannome-gata volcano, NE Japan Arc
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Takeshi Kuritani
Takeyoshi Yoshida
Jun-Ichi Kimura
other
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Takeshi Kuritani
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SCG10-P02
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Thermal history of lower crustal xenoliths from Ichinomegata Maar, NE Japan
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Yasuhiro YANAGIDA
NAKAMURA, Michihiko
YOSHIDA, Takeyoshi
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Yasuhiro YANAGIDA
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SCG10-P03
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New geochemical classification of global boninites
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Kyoko Kanayama
Keitaro Kitamura
Susumu Umino
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Kyoko Kanayama
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SCG10-P04
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Primary boninite magmas explored from melt inclusions
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Keitaro Kitamura
Umino Susumu
Kanayama Kyoko
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Keitaro Kitamura
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Invited
SCG10-P05
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Magmatic accretion and backarc opening controlling crustal structure of the Izu-Ogasawara-Mariana island arc
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Narumi Takahashi
Shuichi Kodaira
Mikiya Yamashita
other
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Narumi Takahashi
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