Subduction of the Philippine Sea plate beneath southwestern Japan: Slab geometry and its relationship to arc magmatism
作者： Junichi Nakajima , Akira Hasegawa
DOI: 10.1029/2006JB004770
关键词:
摘要: [1] We carry out high-resolution three-dimensional seismic tomography of the crust and upper mantle beneath southwestern (SW) Japan using arrival-time data obtained from nationwide seismograph network. The tomographic images provide new insights into configuration Philippine Sea slab arc magmatism. results confirm existence an aseismic portion at greater depths beyond portion. is subducting aseismically down to least a depth 200 km in Chubu, 60–80 Kinki, 60 Chugoku seismically 150–200 Kyushu. In Chubu district, it shallow dip then bends downward volcanic area, whereas Kinki subhorizontally as far Sea. differences geometry between adjacent regions correlate with activity, suggesting importance on Our further imply subduction around 70 northwest Izu Peninsula. that region might have split western eastern parts separated by tear collided Pacific km.
harvard.edu
elsevier.com
agu.org参考文章(65)
Clifford Thurber, Junho Um, A fast algorithm for two-point seismic ray tracing Bulletin of the Seismological Society of America. ,vol. 77, pp. 972- 986 ,(1987)
Junichi Nakajima, Akira Hasegawa, Anomalous low‐velocity zone and linear alignment of seismicity along it in the subducted Pacific slab beneath Kanto, Japan: Reactivation of subducted fracture zone? Geophysical Research Letters. ,vol. 33, ,(2006) , 10.1029/2006GL026773
Hitoshi Oda, Tomiwo Douzen, New evidence for a low-velocity layer on the subducting Philippine Sea plate in southwest Japan Tectonophysics. ,vol. 332, pp. 347- 358 ,(2001) , 10.1016/S0040-1951(00)00157-8
Kyoko Okino, Yasue Shimakawa, Shinji Nagaoka, Evolution of the Shikoku Basin Journal of geomagnetism and geoelectricity. ,vol. 46, pp. 463- 479 ,(1994) , 10.5636/JGG.46.463
Akio Katsumata, Noriko Kamaya, Low-frequency continuous tremor around the Moho discontinuity away from volcanoes in the southwest Japan Geophysical Research Letters. ,vol. 30, pp. 20-1- 20-4 ,(2003) , 10.1029/2002GL015981
Tetsuzo Seno, Izu detachment hypothesis: A proposal of a unified cause for the Miyake-Kozu event and the Tokai slow event Earth, Planets and Space. ,vol. 57, pp. 925- 934 ,(2005) , 10.1186/BF03351872
Makiko Yamauchi, Kazuro Hirahara, Takuo Shibutani, High resolution receiver function imaging of the seismic velocity discontinuities in the crust and the uppermost mantle beneath southwest Japan Earth, Planets and Space. ,vol. 55, pp. 59- 64 ,(2003) , 10.1186/BF03352463
Katsuhiko Shiomi, Haruo Sato, Kazushige Obara, Masakazu Ohtake, Configuration of subducting Philippine Sea plate beneath southwest Japan revealed from receiver function analysis based on the multivariate autoregressive model Journal of Geophysical Research: Solid Earth. ,vol. 109, ,(2004) , 10.1029/2003JB002774
Tetsuzo Seno, Tadashi Yamasaki, Low-frequency tremors, intraslab and interplate earthquakes in Southwest Japan-from a viewpoint of slab dehydration Geophysical Research Letters. ,vol. 30, pp. 2171- ,(2003) , 10.1029/2003GL018349
Yoshimitsu Okada, Keiji Kasahara, Sadaki Hori, Kazushige Obara, Shoji Sekiguchi, Hiroyuki Fujiwara, Akira Yamamoto, Recent progress of seismic observation networks in Japan —Hi-net, F-net, K-NET and KiK-net— Earth, Planets and Space. ,vol. 56, pp. xv- xxviii ,(2004) , 10.1186/BF03353076