Lithospheric structure and geodynamics at the northern margin of Tibetan plateau  

作　　者：Junmeng Zhao Fang Lu Zhichun Li Yang Wang Wentao Ma Xun Liu 

机构地区：[1]Key Laboratory of Continental Collision and Plateau Uplift,Institute of Tibetan Plateau Research,Chinese Academy of Sciences [2]Institute of Geology,China Earthquake Administration [3]Earthquake Administration of Hubei Province [4]Institute of Occupational Disease Protection for Laboring Hygiene of Hunan Province [5]School of Earth Sciences and Resources,China University of Geosciences [6]Institute of Geology,Chinese Academy of Geological Sciences

出　　处：《Earthquake Science》2012年第5期433-450,共18页地震学报（英文版）

基　　金：financially supported by the National Key Basic Research Program (G1999043301);the National Natural Science Foundation of China (Grant Nos. 40930317 and41104055);the Sino Probe-02 project and the NSFC Innovation Research Group Fund (Grant No. 41021001)

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.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.

关 键 词：Tarim basin Altyn Tagh Qaidam basin Tibetan plateau geodynamic model 

分 类 号：P315[天文地球—地震学]