An overview ofIzu-Bonin-Mariana subduction
Group members:罗珽 喻静 袁野 Sada Iddi
Outline
• Motivation• History of the IBM arc system• Morphology of the slab
Motivation
• An outstanding example of an intraoceanic convergent margin(IOCM);
• One of the earth's most dynamic, mysterious, and important geosystems.
Stern et al.2003
Overview of the IBM arc
Osamu Ishizuka et al.2006
Simplified history of the IBM arc system
Stern et al.2003
Map of the northwest Pacific
with ETOPO5 bathymetry
M.S.Miller et all.2006
P-wave tomographic model of the Earth’s mantle
Fukao et al. 2001
P-wave velocity perturbations
Huang & Zhao (2006)
Bulk-sound velocity and shear wave velocity anomalies along PP'
Vertical P-wave and transverse S-wave broadband seismograms at stations in southwestern Japan and China
for the Izu-Bonin deep shock
Sugioka et al. 2007
Bulk-sound velocity,S-wave and P-wave velocity anomalies
M.S.Miller et all.2005
Benioff zones below IBM arcs
van der Hilst et al.1993
Slab morphology in laboratory and numerical models
M.I.Billen 2008
Paleogeographic reconstruction of the western Pacific from the mid-Miocene
M.S.Miller et all.2006
Ogasawara Plateau
Caroline Island Ridge
Cartoon of the 3-D seismic structure below the Izu-Bonin and Mariana arcs and the
Philippine Sea plate
Hilst et al.1993
3-D morphology of the sub-ducting Pacific slab
beneath the IBM arc from P -wave
tomography images
M.S.Miller et all.2005
Picking the maximum gradient of velocity to define the top and bottom of the subducting slab
3D visualization model with focal mechanisms plotted
deeper events are characterizd by a shallower dip slip
M.S.Miller et all.2004
P-wave anomalies around Japan and Izu-Bonin slab at different layers
Obayashi M et al.2009
Obayashi M et al.2009
Obayashi M et al.2009
Obayashi M et al.2009
Stagnant slab influence on 660km
Obayashi et al. (2006)
Stagnant slab influence on 660km
Niu et al.2005
Thanks~
References• Fukao Y, Widiyantoro S, Obayashi M. 2001. Stagnant slabs in the upper and
lower mantle transition region. Rev. Geophys. 39:291–323• Huang J, Zhao D. 2006. High-resolution mantle tomography of China and
surrounding regions. J. Geophys.Res. 111:B09305• Obayashi M, Sugioka H, Yoshimitsu J, Fukao Y. 2006. High temperature
anomalies oceanward of subducting slabs at the 410-km discontinuity. Earth Planet. Sci. Lett. 243:149–58
• Miller M S, Gorbatov A, Kennett B L N. Heterogeneity within the subducting Pacific slab beneath the Izu–Bonin–Mariana arc: Evidence from tomography using 3D ray tracing inversion techniques[J]. Earth and Planetary Science Letters, 2005, 235(1): 331-342.
• Miller M S, Kennett B L N, Toy V G. Spatial and temporal evolution of the subducting Pacific plate structure along the western Pacific margin[J]. Journal of Geophysical Research: Solid Earth, 2006, 111(B2).
• Niu F, Levander A, Ham S, et al. Mapping the subducting Pacific slab beneath southwest Japan with Hi-net receiver functions[J]. Earth and Planetary Science Letters, 2005, 239(1): 9-17.
• Stern R J, Fouch M J, Klemperer S L. An overview of the Izu‐ Bonin‐ Mariana subduction factory[J]. Inside the subduction factory, 2003: 175-222.
• van der Hilst R, Seno T. Effects of relative plate motion on the deep structure and penetration depth of slabs below the Izu-Bonin and Mariana island arcs[J]. Earth and Planetary Science Letters, 1993, 120(3): 395-407.
• Ishizuka O, Kimura J I, Li Y B, et al. Early stages in the evolution of Izu–Bonin arc volcanism: New age, chemical, and isotopic constraints[J]. Earth and Planetary Science Letters, 2006, 250(1): 385-401.
• Miller M S, Kennett B L N, Lister G S. Imaging changes in morphology, geometry, and physical properties of the subducting Pacific plate along the Izu–Bonin–Mariana arc[J]. Earth and Planetary Science Letters, 2004, 224(3): 363-370.
• Obayashi M, Yoshimitsu J, Fukao Y. Tearing of stagnant slab[J]. Science, 2009, 324(5931): 1173-1175.
• Castle J C, Creager K C. A steeply dipping discontinuity in the lower mantle beneath Izu‐ Bonin[J]. Journal of Geophysical Research: Solid Earth, 1999, 104(B4): 7279-7292.
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