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Seismicity of the northern section of the Tanlu fault zone in the Bohai Bay and its implications

文献类型：期刊论文

作者Chen Ying1,3,4; Liang XiaoFeng2,5; Yan HongFang1,3; Jiang MingMing1,3,4; Ai YinShuang1,3,4
刊名CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
出版日期2020-07-01
卷号63期号:7页码:2566-2578
ISSN号0001-5733
关键词Earthquake location Focal mechanism solution Haichenghe fault Taizihe fault
DOI10.6038/cjg2020N0159
英文摘要The northern section of the Tanlu fault zone, extending through Liaoning Province, is considered active at present, at which the 1975 M-s 7. 3 Haicheng earthquake occurred. In this study, we re-pick up 780 events around this fault and then from which relocate 546 small ones using a double-difference relocation method (HypoDD) based on the seismic data recorded by Bohai Bay seismic network and Liaoning Provincial Seismic Network from May 2005 to April 2006. The horizontal and vertical location uncertainties are 1. 5 and 1. 9 km, respectively. The location results show that the seismicity in the main fault of this section is not active. While the banded dense distributions of quakes are present along both the Haichenghe fault and the Taizihe fault east of the main fault in the Bohai aforementioed. General Cut and Paste method (gCAP) is used to calculate the focal mechanism solutions of these events, from which four solutions are reliable. In combination with previous relevant studies, the focal mechanisms of the small earthquakes in the study region are dominated by strike-slip and normal faulting, which is consistent with the regional tectonic stress field. The focal depths on the Haichenghe fault and the Taizihe fault extend downward to the mid-lower crust. Combining with heat flow data and petrophysical experiments, this work speculates that the middle and lower crust beneath study region is likely composed of dry mafic rocks.
WOS关键词EARTHQUAKE ; CHINA ; DEFORMATION ; LITHOSPHERE ; RELOCATION ; TECTONICS ; RHEOLOGY ; DEPTHS ; CRUST ; AREA
WOS研究方向Geochemistry & Geophysics
语种英语
出版者SCIENCE PRESS
WOS记录号WOS:000550583600006
源URL[http://ir.iggcas.ac.cn/handle/132A11/97581]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Ai YinShuang
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
4.Guangdong Earthquake Agcy, Guangzhou 510070, Peoples R China
5.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Chen Ying,Liang XiaoFeng,Yan HongFang,et al. Seismicity of the northern section of the Tanlu fault zone in the Bohai Bay and its implications[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2020,63(7):2566-2578.
APA Chen Ying,Liang XiaoFeng,Yan HongFang,Jiang MingMing,&Ai YinShuang.(2020).Seismicity of the northern section of the Tanlu fault zone in the Bohai Bay and its implications.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,63(7),2566-2578.
MLA Chen Ying,et al."Seismicity of the northern section of the Tanlu fault zone in the Bohai Bay and its implications".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 63.7(2020):2566-2578.

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来源：地质与地球物理研究所

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