Subduction of the Philippine Sea slab in view of P-wave anisotropy

Ishise, Motoko; Oda, Hitoshi

doi:10.1016/j.pepi.2007.11.003

Cited by 28 publications

(25 citation statements)

References 54 publications

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“…SWS measurements have been made, which revealed the existence of significant anisotropy in SW Japan (e.g., Ando et al, 1983;Kaneshima, 1990;Hiramatsu et al, 1997;Salah et al, 2008;Terada et al, 2013). P-wave tomography for azimuthal anisotropy beneath SW Japan has been investigated by Ishise and Oda (2008) and Zhao (2012, 2013). These studies have obtained consistent results which show a complex pattern of Vp anisotropy in the crust and upper mantle.…”

Section: Southwest Japanmentioning

confidence: 99%

Seismic anisotropy tomography: New insight into subduction dynamics

2016

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Body-wave and surface-wave tomography, receiver-function imaging, and shear-wave splitting measurements have shown that seismic anisotropy and heterogeneity coexist in all parts of subduction zones, providing important constraints on the mantle flow and subduction dynamics. P-wave anisotropy tomography is a new but powerful tool for mapping three-dimensional variations of azimuthal and radial seismic anisotropy in the crust and mantle. P-wave azimuthal-anisotropy tomography has been applied widely to the Circum-Pacific subduction zones, Mainland China and North America, whereas P-wave radial-anisotropy tomography was applied to only a few areas including Northeast Japan, Southwest Japan and North China Craton. These studies have revealed complex anisotropy in the crust and mantle lithosphere associated with the surface geology and tectonics, anisotropy reflecting subduction-driven corner flow in the mantle wedge, frozen-in fossil anisotropy in the subducting slabs formed at the mid-ocean ridge, as well as olivine fabric transitions due to changes in water content, stress and temperature. Shear-wave splitting tomography methods have been also proposed, but their applications are still limited and preliminary. There is a discrepancy between the surface-wave and body-wave tomographic models in radial anisotropy of the mantle wedge beneath Japan, which is a puzzle but an intriguing topic for future studies.

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Section: Southwest Japanmentioning

confidence: 99%

Seismic anisotropy tomography: New insight into subduction dynamics

2016

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“…Dotted line: the retrieved P-wave velocity model. reported by Ishise and Oda (2008). However, we removed the effect of the local structure near the seismic stations by using the average traveltime residuals for each seismic station during the calculation to correct the traveltime, because the surface structure of the study area is highly heterogenic (e.g., Tanaka et al, 2005).…”

Section: Methodsmentioning

confidence: 99%

“…1, the MTL extends throughout southwestern Japan, where a similar zonal structure is developed. An anisotropic tomography study revealed that the zonal arrangement shows isotropic zonal heterogeneity, where the fast direction of anisotropy is parallel to the strike of the geological lineament (Ishise and Oda, 2008).…”

Section: 232mentioning

confidence: 99%

Dual subduction tectonics and plate dynamics of central Japan shown by three-dimensional P-wave anisotropic structure

Ishise

Koketsu

2015

Physics of the Earth and Planetary Interiors

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“…Long (2013) has made a detailed review of seismic anisotropy studies of subduction zones; in particular, studies using shear-wave splitting measurements and receiver functions. So far, P-wave anisotropy tomography has been applied to investigate the 3-D anisotropic structure in a number of subduction zones, including New Zealand (Eberhart-Philips and Henderson 2004; Eberhart-Philips and Reyners 2009), Northeast Japan (Ishise and Oda 2005;Wang and Zhao 2008Cheng et al 2011;Huang et al 2011a;Tian and Liu 2013), Southwest Japan (Ishise and Oda 2008;Zhao 2012, 2013), South Kuril Liu et al 2013a); Java (Koulakov et al 2009), Central America (Rabbel et al 2011), Alaska (Tian and Zhao 2012), Eastern Tibet (Wei et al 2013), North China Craton above the stagnant Pacific slab (Wang et al , 2014Tian and Zhao 2013), and western USA (Huang and Zhao 2013c).…”

Section: Seismic Anisotropy Tomographymentioning

confidence: 99%

Subduction Zone Tomography

Zhao

2015

Multiscale Seismic Tomography

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In this chapter, we review recent seismic tomography studies of subduction zones and new insights into arc magmatism, seismotectonics and subduction dynamics. Seismic velocity and attenuation tomography clearly reveals subducting slabs as high-velocity and low-attenuation zones, where intermediate-depth and deep earthquakes occur. In the crust and upper-mantle wedge, low-velocity (low-V) and high-attenuation (low-Q) anomalies are revealed beneath arc and back-arc volcanoes, and they extend to a deeper portion of the mantle wedge, indicating that the low-V and low-Q anomalies reflect source zones of arc magmatism and volcanism which are caused by corner flow in the mantle wedge and fluids from slab dehydration. P-wave anisotropy tomography and shear-wave splitting measurements also provide important constraints on mantle flows and dynamics in subduction zones.

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Subduction of the Philippine Sea slab in view of P-wave anisotropy

Cited by 28 publications

References 54 publications

Seismic anisotropy tomography: New insight into subduction dynamics

Seismic anisotropy tomography: New insight into subduction dynamics

Dual subduction tectonics and plate dynamics of central Japan shown by three-dimensional P-wave anisotropic structure

Subduction Zone Tomography

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