TY - JOUR
T1 - Upper mantle structure and dynamics beneath Southeast China
AU - Huang, Zhouchuan
AU - Wang, Liangshu
AU - Zhao, Dapeng
AU - Xu, Mingjie
AU - Mi, Ning
AU - Yu, Dayong
AU - Li, Hua
AU - Li, Cheng
N1 - Funding Information:
We thank the Seismological Bureau of Fujian province, the Institute of Earth Science of Academic Sinica, Taiwan, and the IRIS Data Management Center for providing the waveform data used in this study. Dr. G. Jiang kindly helped us at the data processing stage. Profs. G. Helffrich, C. Chiarabba and an anonymous referee provided constructive review comments, which improved the manuscript. Discussions with Prof. Q. Wang, X. Zhou, J. Qiu and Dr. Z. He were very helpful. We thank H. Zhu, Z. Li and others for their help during the field seismic experiments in Fujian and Jiangxi provinces. This work was supported by grants (40634021, DD09-63 and YPH08043) from the National Natural Science Foundation of China, the Scientific Research Foundation of Graduate School of Nanjing University, and a grant (Kiban-A 17204037) to D. Zhao from Japan Society for the Promotion of Science (JSPS). Most of the figures were made by using Generic Mapping Tools ( Wessel and Smith, 1998 ).
PY - 2010/10
Y1 - 2010/10
N2 - We applied teleseismic tomography to 5671 relative travel-time residuals from 257 teleseismic events recorded by 69 seismic stations to determine the 3D P-wave velocity structure of the upper mantle under Southeast (SE) China. Our results show prominent low P-wave velocity (low-Vp) anomalies under SE China which may reflect the remnant magma chambers and channels of the Late Mesozoic igneous rocks, which may be reheated by the upwelling mantle flow from the lower mantle driven by the deep subduction in East Asia during the Cenozoic. High-Vp anomalies are revealed in the upper mantle to the east of Taiwan, which represent the subducted Eurasian plate. Our result also suggests the break-off of the subducted Eurasian plate caused by its interaction with the Philippine Sea plate under Central and North Taiwan. The slab break-off may have created a mantle window through which the asthenospheric flow arises, causing the high heat flow and rapid uplift in the Taiwan orogen.
AB - We applied teleseismic tomography to 5671 relative travel-time residuals from 257 teleseismic events recorded by 69 seismic stations to determine the 3D P-wave velocity structure of the upper mantle under Southeast (SE) China. Our results show prominent low P-wave velocity (low-Vp) anomalies under SE China which may reflect the remnant magma chambers and channels of the Late Mesozoic igneous rocks, which may be reheated by the upwelling mantle flow from the lower mantle driven by the deep subduction in East Asia during the Cenozoic. High-Vp anomalies are revealed in the upper mantle to the east of Taiwan, which represent the subducted Eurasian plate. Our result also suggests the break-off of the subducted Eurasian plate caused by its interaction with the Philippine Sea plate under Central and North Taiwan. The slab break-off may have created a mantle window through which the asthenospheric flow arises, causing the high heat flow and rapid uplift in the Taiwan orogen.
KW - Deep earthquakes
KW - Late Mesozoic igneous rocks
KW - Southeast China
KW - Subducted Eurasian plate
KW - Teleseismic tomography
KW - Upwelling mantle flow
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U2 - 10.1016/j.pepi.2010.07.010
DO - 10.1016/j.pepi.2010.07.010
M3 - Article
AN - SCOPUS:77956912178
VL - 182
SP - 161
EP - 169
JO - Physics of the Earth and Planetary Interiors
JF - Physics of the Earth and Planetary Interiors
SN - 0031-9201
IS - 3-4
ER -