Outline of Session

   

Solid Earth Sciences(S) / Complex & General(CG) /  **International Session
S-CG10 Evolution of continental crust and Project IBM


Short title Continental crust and Project IBM
Oral presentation
Date/Room/Chair
May 22 PM1 (14:15 - 16:00) 101B Yoshihiko Tamura  / Osamu Ishizuka 
May 22 PM2 (16:15 - 18:00) 101B Alexander Nichols 
Poster presentation
Date/Room
May 22 (Core Time 18:15 - 19:30) Convention Hall
Contact Yoshihiko Tamura
Email tamuray@jamstec.go.jp
Convener Yoshihiko Tamura 
Scope 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.
Notes  


Time Presentation No Title Author Presenter Abstract
Oral Presentation   May 22 PM1 (14:15-16:00) 101B                              to the top
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 English
14:30 - 14:45 Invited
SCG10-02
Pattern of fluid release from the subducting slab at the IBM margin Ikuko Wada Ikuko Wada English
14:45 - 15:00 Invited
SCG10-03
Uranium-series evidence for variations in subduction components along the Izu volcanic arc Heye Freymuth
Tim Elliott
Yoshihiko Tamura
Heye Freymuth English
15:00 - 15:15 SCG10-04 Evidence from melt inclusions for magmas stalling at mid-crustal depths Alexander Nichols
Yoshihiko Tamura
Robert Stern
other
Alexander Nichols English
15:15 - 15:30 SCG10-05 A tale of two magmas: Contrasting MORB-Boninite reaction trends in IBM forearc moho transition zone Matthew Loocke
Jonathan E. Snow
Osamu Ishizuka
Matthew Loocke English
15:30 - 15:45 SCG10-06 Various arc magmas from a common plate slab: Sources and genetic conditions of the coexisting alkali basalts, sub-alkali Jun-Ichi Kimura
Atsushi Kamei
Junichi Nakajima
other
Jun-Ichi Kimura English
15:45 - 16:00 SCG10-07 Forming continental crust: Density sorting in subducted arcs Peter Kelemen
Mark D. Behn
Peter Kelemen English
Oral Presentation   May 22 PM2 (16:15-18:00) 101B                              to the top
16:15 - 16:30 Invited
SCG10-08
Origin of the proto-Philippine Sea Plate and the discovery of Mesozoic basement beneath the northern Izu-Bonin Arc Kenichiro Tani
Osamu Ishizuka
Hayato Ueda
other
Kenichiro Tani English
16:30 - 16:45 Invited
SCG10-09
Temporal variation of OIB-like magmatism in the Western Philippine Sea-link to spreading of the West Philippine Basin- Osamu Ishizuka
Rex N. Taylor
Yasuhiko Ohara
other
Osamu Ishizuka English
16:45 - 17:00 SCG10-10 Why we need drill deep into the oceanic arc crust? Yoshihiko Tamura
Yoshiyuki Tatsumi
Yoshihiko Tamura English
17:00 - 17:15 3-min talk in an oral session@(SCG10-P03/SCG10-P04/šSCG10-P05)


Presentation No Title Author Presenter Abstract
Poster Presentation   May 22  Core Time (18:15-19:30) Convention Hall                    to the top
Invited
SCG10-P01
Temperature of primary magma from Sannome-gata volcano, NE Japan Arc Takeshi Kuritani
Takeyoshi Yoshida
Jun-Ichi Kimura
other
Takeshi Kuritani English
SCG10-P02 Thermal history of lower crustal xenoliths from Ichinomegata Maar, NE Japan Yasuhiro YANAGIDA
NAKAMURA, Michihiko
YOSHIDA, Takeyoshi
Yasuhiro YANAGIDA English
SCG10-P03 New geochemical classification of global boninites Kyoko Kanayama
Keitaro Kitamura
Susumu Umino
Kyoko Kanayama English
SCG10-P04 Primary boninite magmas explored from melt inclusions Keitaro Kitamura
Umino Susumu
Kanayama Kyoko
Keitaro Kitamura English
Invited
SCG10-P05
Magmatic accretion and backarc opening controlling crustal structure of the Izu-Ogasawara-Mariana island arc Narumi Takahashi
Shuichi Kodaira
Mikiya Yamashita
other
Narumi Takahashi English