| Seismic tomography of the crust and upper mantle in the Bohai Bay Basin and its adjacent regions |
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| 作者单位： | ZHANG Ling（Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Gocad Research Group, Rue Doyen M. Roubault, 54501, Nancy, France） ;
LIU JinSong（Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China） ;
HAO TianYao（Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China） ;
LIU JianHua（Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China） ;
XU Yi（Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China） ; |
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| 基金项目： | 国家高技术研究发展计划(863计划);国家自然科学基金 |
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| 摘 要： | In the Bohai Bay Basin and its adjacent regions(112°―124°E,34°―42°N),there exists abundant gas-petroleum while modern inter-plate seismic activity is robust.Although the tectonic structure of this region is very complicated,plenty of geological,geophysical and geochemical data and results are obtained through previous researches.On the basis of absorbing previous results,especially various kinds of geological and geophysical results,we collect and process the arrival time of P-wave phases of local events and tele-seismic events recorded by the station within this region from 1978 to 2004,build the responding initial model,and image the velocity structure of the crust and upper mantle of this region via tomography.The perturbation images of various depths and velocity profiles imply that the velocity structure of the crust and upper mantle in the Bohai Bay Basin and its adjacent regions is mainly influenced by the surface tectonic units,and is characterized by "Stripped along east-west,and zoned along south-north";some large-scaled faults penetrate Moho and lithosphere,and provide the channels for the basic lava or hot mass upwelling from the mantle.
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| 收稿时间： | 16 August 2006 |
| 修稿时间： | 11 April 2007 |
Seismic tomography of the crust and upper mantle in the Bohai Bay Basin and its adjacent regions |
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| Authors: | Zhang Ling Liu JinSong Hao TianYao Liu JianHua Xu Yi |
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| Institution: | 1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Gocad Research Group, Rue Doyen M. Roubault, 54501, Nancy, France
2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | In the Bohai Bay Basin and its adjacent regions (112°–124°E, 34°–42°N), there exists abundant gas-petroleum while modern inter-plate
seismic activity is robust. Although the tectonic structure of this region is very complicated, plenty of geological, geophysical
and geochemical data and results are obtained through previous researches. On the basis of absorbing previous results, especially
various kinds of geological and geophysical results, we collect and process the arrival time of P-wave phases of local events
and tele-seismic events recorded by the station within this region from 1978 to 2004, build the responding initial model,
and image the velocity structure of the crust and upper mantle of this region via tomography. The perturbation images of various
depths and velocity profiles imply that the velocity structure of the crust and upper mantle in the Bohai Bay Basin and its
adjacent regions is mainly influenced by the surface tectonic units, and is characterized by “Stripped along east-west, and
zoned along south-north”; some large-scaled faults penetrate Moho and lithosphere, and provide the channels for the basic
lava or hot mass upwelling from the mantle.
Supported by the 863 Project (Grant No. 2004AA615010) and the National Natural Science Foundation of China (Grant Nos. 40620140435
and 40674046) |
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| Keywords: | Bohai Bay Basin tomography crust and upper mantle |
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