1 Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China 2 Institute of Geology, China Earthquake Administration, Beijing 100029, China 3 Earthquake Administration of Hubei Province, Wuhan 430071, China 4 Institute of Occupational Disease Protection for Laboring Hygiene of Hunan Province, Changsha 410007, China 5 School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
Lithospheric structure and geodynamics at the northern margin of Tibetan plateau
1 Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China 2 Institute of Geology, China Earthquake Administration, Beijing 100029, China 3 Earthquake Administration of Hubei Province, Wuhan 430071, China 4 Institute of Occupational Disease Protection for Laboring Hygiene of Hunan Province, Changsha 410007, China 5 School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
摘要A recent integrated geophysical survey has been completed along a transect from Baicheng, Xinjiang to Da Qaidam, Qinghai, China. In this study, wide-angle seismic reflection/refraction exploration with 10 shot points has been carried out to acquire the velocity structure of the crust and uppermost mantle. The earthquake focal mechanism solutions and terrestrial heat flow along the transect have also been obtained and analyzed. Based on the velocity structure of the crust and uppermost mantle along the transect, and combined with the focal mechanism solutions and terrestrial heat flow we develop a geodynamic model for the northern margin of the Tibetan plateau. This model reveals the detailed structure of the crust and uppermost mantle, determines the relationship of basin and range coupling, explores the deep dynamic setting for superposed basins, and establishes the northern boundary condition for Tibetan plateau research.
Abstract：A recent integrated geophysical survey has been completed along a transect from Baicheng, Xinjiang to Da Qaidam, Qinghai, China. In this study, wide-angle seismic reflection/refraction exploration with 10 shot points has been carried out to acquire the velocity structure of the crust and uppermost mantle. The earthquake focal mechanism solutions and terrestrial heat flow along the transect have also been obtained and analyzed. Based on the velocity structure of the crust and uppermost mantle along the transect, and combined with the focal mechanism solutions and terrestrial heat flow we develop a geodynamic model for the northern margin of the Tibetan plateau. This model reveals the detailed structure of the crust and uppermost mantle, determines the relationship of basin and range coupling, explores the deep dynamic setting for superposed basins, and establishes the northern boundary condition for Tibetan plateau research.
基金资助:the National Key Basic Research Program (G1999043301), the National Natural Science Foundation of China (Grant Nos. 40930317 and 41104055), the SinoProbe-02 project and the NSFC Innovation Research Group Fund (Grant No. 41021001)
通讯作者:
Junmeng Zhao
E-mail: zhaojm@itpcas.ac.cn
引用本文:
Junmeng Zhao, Fang Lu, Zhichun Li, Yang Wang, Wentao Ma, Xun Liu. Lithospheric structure and geodynamics at the northern margin of Tibetan plateau[J]. 《地震学报》英文版, 2012, 25(5-6): 433-450.
Junmeng Zhao, Fang Lu, Zhichun Li, Yang Wang, Wentao Ma, Xun Liu. Lithospheric structure and geodynamics at the northern margin of Tibetan plateau. Earthquake Science, 2012, 25(5-6): 433-450.
