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Emeishan mantle plume and its potential impact on the Sichuan Basin: Insights from numerical modeling
He, Lijuan1,2,3
2022-02-01
Source PublicationPHYSICS OF THE EARTH AND PLANETARY INTERIORS
ISSN0031-9201
Volume323Pages:8
AbstractThe Sichuan Basin, adjacent to the Emeishan large igneous province (ELIP), is one of the large petroliferous basins in China. The effects of the ELIP on the basin thermal history and hydrocarbon generation have attracted much attentions. A 2D viscoplastic model is applied to simulate the evolution of the Emeishan mantle plume, and then the effects of the plume on the Sichuan Basin are discussed. Constrained by the pre-eruption uplift and volcanic activity, the modeling infers that the initial hemispherical Emeishan plume had a radius of 85-150 km and an excess temperature of 150-300 K. The plume head extended laterally after reaching the bottom of the lithosphere. The plume head-lithosphere interaction led to lithosphere erosion and partial melting atop the plume head. Near the junction between the inner and intermediate ELIP zones, the lithosphere erosion was the most serious and the mantle melting degree was the highest. There the basalt might erupt from the Xiaojing-Qiaojia fault, and flow to the intermediate ELIP zone due to terrain. That can explain the concentration of Emeishan basalts in the intermedia ELIP zone and the abnormal high paleo-heat flow in the southwestern Sichuan Basin. Thermal convection induced in the upper mantle prevented the plume head from spreading beneath the lithosphere, and the lateral extent of the plume head was 1200-1300 km. Only a few unmelted plume materials could reach the central Sichuan Basin, which should be the boundary of the outer ELIP zone. The Permian basalts and high paleo-heat flow anomalies in the central Sichuan basin might be derived from the subsequent lithospheric extension, which led to the upwelling and decompression melting of both the plume and asthenosphere materials. Since the plume head couldn't migrate to the northeastern Sichuan Basin, the surface observations there should be independent of the Emeishan plume.
KeywordEmeishan mantle plume Sichuan Basin Geodynamic modeling Mantle convection Paleo-heat flow Basalts
DOI10.1016/j.pepi.2022.106841
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordLARGE IGNEOUS PROVINCE ; FLOOD-BASALT PROVINCE ; LITHOSPHERE INTERACTION ; CHINA ; CONSTRAINTS ; BENEATH ; PETROGENESIS ; GEODYNAMICS ; TOPOGRAPHY ; GENERATION
Language英语
Funding ProjectNational Natural Science Foundation of China[41830424] ; National Natural Science Foundation of China[42074095]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000750859400003
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/104891
Collection岩石圈演化国家重点实验室
Corresponding AuthorHe, Lijuan
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
He, Lijuan. Emeishan mantle plume and its potential impact on the Sichuan Basin: Insights from numerical modeling[J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS,2022,323:8.
APA He, Lijuan.(2022).Emeishan mantle plume and its potential impact on the Sichuan Basin: Insights from numerical modeling.PHYSICS OF THE EARTH AND PLANETARY INTERIORS,323,8.
MLA He, Lijuan."Emeishan mantle plume and its potential impact on the Sichuan Basin: Insights from numerical modeling".PHYSICS OF THE EARTH AND PLANETARY INTERIORS 323(2022):8.
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