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Anomalous Post-Rift Subsidence in the Bohai Bay Basin, Eastern China: Contributions From Mantle Process and Fault Activity
Liu, Qiongying1; He, Lijuan2,3; Yi, Zejun4; Zhang, Linyou5
2022
Source PublicationTECTONICS
ISSN0278-7407
Volume41Issue:1Pages:18
AbstractThe 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.
Keywordpost-rift tectonic subsidence tectono-thermal modeling dynamic topography mantle convection active fault Bohai Bay Basin
DOI10.1029/2021TC006748
Funding OrganizationNational 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
WOS KeywordCENOZOIC THERMAL HISTORY ; DYNAMIC TOPOGRAPHY ; TECTONIC SUBSIDENCE ; HEAT-FLOW ; NORTH ; EVOLUTION ; CRATON ; LITHOSPHERE ; OFFSHORE ; MODEL
Language英语
Funding ProjectNational Natural Science Foundation of China[41704087] ; National Natural Science Foundation of China[42074095] ; National Key Research and Development Program of China[2019YFC0604901]
Funding OrganizationNational 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
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000751221200002
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/104890
Collection岩石圈演化国家重点实验室
Corresponding AuthorLiu, Qiongying
Affiliation1.China Earthquake Adm, State Key Lab Earthquake Dynam, Inst Geol, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Northeast Petr Univ, Sch Earth Sci, Daqing, Peoples R China
5.China Geol Survey, Ctr Hydrogeol & Environm Geol, Baoding, Peoples R China
Recommended Citation
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.
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