Wedge tectonics in South China:constraints from new seismic data

作     者：Tingzi Li Mingming Jiang Liang Zhao Weihua Yao Ling Chen Yang Chu Baolu Sun Yinshuang Ai Bo Wan Klaus Gessner Huaiyu Yuan 栗婷姿;姜明明;赵亮;姚卫华;陈凌;褚杨;孙宝璐;艾印双;万博;Klaus Gessner;袁怀玉

作者机构：State Key Laboratory of Lithospheric EvolutionInstitute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Australian Research Council Centre of Excellence for Core to Crust Fluid SystemsDepartment of Earth and Environmental SciencesMacquarie UniversityNew South Wales 2109Australia Centre for Exploration TargetingUniversity of Western AustraliaCrawley WA 6009Australia Key Laboratory of Earth and Plantenry PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of SciencesBeijing 100049China Guangdong Provincial Key Lab of Geodynamics and GeohazardsSchool of Earth Sciences and EngineeringSun Yat-sen UniversityGuangzhou 510275China Geological Survey of Western AustraliaPerth WA 6001Australia 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2022年第67卷第14期

页      面：1496-1507,M0004页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：partially supported by the National Natural Science Foundation of China(91955210 41625016 and 41888101) 

主　　题：Lithosphere architecture Seismic receiver functions Ambient noise tomography South China Block Wedge tectonics 

摘      要：Collisional orogens form when tectonic forces amalgamte fragments of Earth’s continental *** sutures between individual fragments,or terranes,are potential sites of weakness that facilitate subsequent continental ***,the lithospheric architecture of collisional orogens provides key information for evaluating the long-term evolution of the continental interior:for example,the South China Block(SCB),where the tectonic history is severely obscured by extensive surface deformation,magmatism,and *** new passive-source seismic models,we show a contrasting seismic architecture across the SCB,with three prominent crustal dipping structures across the Jiangnan *** with constraints from multi-disciplinary regional geophysical datasets,these pronounced dipping patterns are interpreted as relict wedge-like lithospheric deformation zones initiated in the fossil collisions that assembled the Yangtze Block and the *** overall trend of these tectonic wedges implies successive crustal growth along paleo-continental margins and is indicative of northward subduction and docking of accretional *** contrast,no such dipping structures are preserved in the Cathaysia Block,indicating a weak and reorganized *** variations in the deformation responses across the SCB reflect the long-term modifications of the lithosphere caused by prolonged collision and extension events throughout the tectonic history of the *** results demonstrate the critical roles that suture zones played in the successive growth and evolution of the continental lithosphere.