Evolution from fore-arc oceanic crust to island arc crust: A seismic study along the Izu-Bonin fore arc

Petrological studies have suggested that oceanic crust is formed during the initial stage of subduction. However, there is little geophysical evidence for the formation of oceanic crust in the fore‐arc region. We conducted an active‐source seismic survey in the fore‐arc region of the Izu‐Bonin intra...

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Bibliographic Details
Published in:Journal of Geophysical Research: Solid Earth 2010-09, Vol.115 (B9), p.n/a
Main Authors: Kodaira, Shuichi, Noguchi, Naoto, Takahashi, Narumi, Ishizuka, Osamu, Kaneda, Yoshiyuki
Format: Article
Language:English
Subjects:
Crusts
Earth sciences
Earth, ocean, space
Evolution
Exact sciences and technology
Geophysics
Izu-Bonin
Marine
Marine geology
Migration
Plate tectonics
Ridges
Seismic engineering
Seismic phenomena
seismic survey
Seismology
subduction zone
volcanic arc
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Summary:Petrological studies have suggested that oceanic crust is formed during the initial stage of subduction. However, there is little geophysical evidence for the formation of oceanic crust in the fore‐arc region. We conducted an active‐source seismic survey in the fore‐arc region of the Izu‐Bonin intraoceanic arc to examine processes of crustal formation associated with the initiation of subduction. We used seismic refraction tomography to obtain a detailed seismic velocity model and diffraction‐stack migration of picked reflection travel times to derive reflectivity images. These data show a remarkably thin crust (
ISSN:0148-0227
2169-9313
2156-2202
2169-9356
DOI:10.1029/2009JB006968