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Short title
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Evolution of continental crust
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Oral presentation
Date/Room/Chair
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May 21 AM1 (09:00 - 10:30)
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302
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Alexander Nichols
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May 21 AM2 (10:45 - 12:15)
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302
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Yoshihiko Tamura
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Poster presentation
Date/Room
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May 21 (Core Time 13:45 - 15:15, 17:15 - 18:30)
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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
/ Robert J. Stern
/ Yoshiyuki Tatsumi
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Scope
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Continental crust today is mostly generated by arc magmatism above subduction zones, but also at hot-spots and rifts. Today, there are approximately 7 billion cubic kilometers of continental crust (Cogley, 1984) and it is often assumed that continental crust volume has been growing over Earth history. However, it is clear from truncations of ancient orogenic belts and the presence of >4.0 Ga zircons that much Precambrian continental crust has been destroyed, mostly by tectonic erosion at subduction zones. Moreover, lower crust foundering and decratonization might also be important destroyers of continental crust. At present, creation and destruction of continental crust is either in balance or more crust is being destroyed than created; the uncertainty comes from unknown deep losses of continental crust at collision zones and due to lower crustal foundering. This session seeks to understand how continental crust is produced and destroyed today and the recent geologic past? We ask this question to a broad range of geologists, geophysicists, geochemists and petrologists who are interested in crustal evolution.
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Notes
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| Time |
Presentation No |
Title |
Author |
Presenter |
Abstract |
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Oral Presentation May 21 AM1 (09:00-10:30) 302 to the top
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09:00 - 09:30
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Invited
SCG04-01
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The yin and yang of continental crust creation and destruction by plate tectonic processes
|
Robert Stern
David W Scholl
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Robert Stern
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09:30 - 09:45
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SCG04-02
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Crustal growth along a triple plate junction: Tectonic processes and geochemical variation in the Philippine arc
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Maria Luisa Tejada
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Maria Luisa Tejada
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09:45 - 10:00
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SCG04-03
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Incoming Pacific Plate beneath NW Pacific Subduction Zones: Igneous Variation in Subduction Inventories
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Jun-Ichi Kimura
Folkmar Hauff
Naoto Hirano
other
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Jun-Ichi Kimura
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10:00 - 10:15
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Invited
SCG04-04
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Geochemical evidence for delamination from the Jurassic Talkeetna arc crustal section: missing pyroxenites from the Moho
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Susan DeBari
Andrew R. Greene
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Susan DeBari
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10:15 - 10:30
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SCG04-05
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Three primary magma types from Pagan volcano in the Mariana arc and implications for arc magma genesis
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Yoshihiko Tamura
Osamu Ishizuka
Robert Stern
other
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Yoshihiko Tamura
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Oral Presentation May 21 AM2 (10:45-12:15) 302 to the top
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10:45 - 11:15
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Invited
SCG04-06
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Ultra-deep drilling to the middle crust of the Izu-Bonin-Mariana arc: Why is this planet to be the Earth?
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Yoshiyuki Tatsumi
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Yoshiyuki Tatsumi
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11:15 - 11:30
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Invited
SCG04-07
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Active seismic studies in the Izu-Bonin arc and ultra-deep drilling
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Shuichi Kodaira
Narumi Takahashi
Takeshi Sato
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Shuichi Kodaira
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11:30 - 11:45
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SCG04-08
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Evidence for Mesozoic basement in the Izu-Bonin-Mariana arc system
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Osamu Ishizuka
Kenichiro Tani
Yumiko Harigane
other
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Osamu Ishizuka
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11:45 - 12:00
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SCG04-09
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Evidence for wehrlite and dunite xenoliths from West Zealandia Seamount, Mariana Arc, originating in the middle crust
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Alexander Nichols
Yoshihiko Tamura
Robert Stern
other
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Alexander Nichols
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12:00 - 12:15
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3-min talk in an oral session
| Presentation No |
Title |
Author |
Presenter |
Abstract |
| SCG04-P02 |
Crustal reflector imaging around the Oligocene paleo arc in the Izu island arc deduced from OBS wide-angle data |
Takeshi Sato
Gou Fujie
Narumi Takahashi
other |
Takeshi Sato |
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| Presentation No |
Title |
Author |
Presenter |
Abstract |
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Poster Presentation May 21 Core Time (13:45-15:15, 17:15-18:30) to the top
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SCG04-P01
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Chronology and Sr isotope study for Cretaceous and Paleogene Granitic Rocks SW Japan
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Kazuya Iida
Hikaru Iwamori
Park Taeho
other
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Kazuya Iida
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SCG04-P02
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Crustal reflector imaging around the Oligocene paleo arc in the Izu island arc deduced from OBS wide-angle data
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Takeshi Sato
Gou Fujie
Narumi Takahashi
other
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Takeshi Sato
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SCG04-P03
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Paleo-arc arrangement during Eocene to Oligocene in Izu-Ogasawara forearc region revealed from seismic reflection survey
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Mikiya Yamashita
Narumi Takahashi
Shuichi Kodaira
other
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Mikiya Yamashita
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