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Anomalous Post-Rift Subsidence in the Bohai Bay Basin, Eastern China: Contributions From Mantle Process and Fault Activity

文献类型：期刊论文

作者Liu, Qiongying2; He, Lijuan3,4; Yi, Zejun5; Zhang, Linyou1
刊名TECTONICS
出版日期2022
卷号41期号:1页码:18
关键词post-rift tectonic subsidence tectono-thermal modeling dynamic topography mantle convection active fault Bohai Bay Basin
ISSN号0278-7407
DOI10.1029/2021TC006748
英文摘要The Bohai Bay Basin is the largest Cenozoic rift basin in eastern China, which exhibits a high rate of post-rift subsidence deviating from the theoretical exponentially decay trend of thermal subsidence. The driving force for this phenomenon remains an outstanding question. Here we quantify the spatial and temporal distribution of the anomalous post-rift subsidence by removing the thermal subsidence related to earlier stretching events from the observed tectonic subsidence. A multi-episodic finite extension model is employed to estimate the stretching factors during rifting for nine profiles and 48 wells covering the basin. Our results show that the anomalous subsidence commenced at 12 Ma and the average anomalous subsidence rate accelerated from similar to 19 m/Myr during the late Miocene to similar to 75 m/Myr during the Quaternary, reaching similar to 400 m at present. The anomalous subsidence is compared with published changes in dynamic topography arising from mantle flow. The temporal evolution of the dynamic topography generally fits the evolution of the anomalous subsidence, whereas variation in dynamic topography exhibits smaller amplitude and larger wavelength than our results. Small-scale convection in the shallow mantle might play a role in generating short-wavelength topography disturbances in the past tens of million years. Besides, the spatial distribution of the Quaternary anomalous subsidence generally coincides with fault movements in the past similar to 2 Myr. We suggest mantle processes as well as fault activities might be possible mechanisms accounting for additional accommodation in the basin.
WOS关键词CENOZOIC THERMAL HISTORY ; DYNAMIC TOPOGRAPHY ; TECTONIC SUBSIDENCE ; HEAT-FLOW ; NORTH ; EVOLUTION ; CRATON ; LITHOSPHERE ; OFFSHORE ; MODEL
资助项目National Natural Science Foundation of China[41704087] ; National Natural Science Foundation of China[42074095] ; National Key Research and Development Program of China[2019YFC0604901]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000751221200002
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/104890]  
专题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Liu, Qiongying
作者单位1.China Geol Survey, Ctr Hydrogeol & Environm Geol, Baoding, Peoples R China
2.China Earthquake Adm, State Key Lab Earthquake Dynam, Inst Geol, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Northeast Petr Univ, Sch Earth Sci, Daqing, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Qiongying,He, Lijuan,Yi, Zejun,et al. Anomalous Post-Rift Subsidence in the Bohai Bay Basin, Eastern China: Contributions From Mantle Process and Fault Activity[J]. TECTONICS,2022,41(1):18.
APA Liu, Qiongying,He, Lijuan,Yi, Zejun,&Zhang, Linyou.(2022).Anomalous Post-Rift Subsidence in the Bohai Bay Basin, Eastern China: Contributions From Mantle Process and Fault Activity.TECTONICS,41(1),18.
MLA Liu, Qiongying,et al."Anomalous Post-Rift Subsidence in the Bohai Bay Basin, Eastern China: Contributions From Mantle Process and Fault Activity".TECTONICS 41.1(2022):18.

入库方式： OAI收割

来源：地质与地球物理研究所

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