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  4. 岩石圈演化国家重点实验室
The role of mantle viscosity heterogeneities on the development of secondary plumes in the upper mantle

文献类型：期刊论文

作者Li, Yang2,3; Wang, Yongming2; Zhao, Liang3; Chen, Ling3; Huang, Jinshui1
刊名GEOPHYSICAL JOURNAL INTERNATIONAL
出版日期2023-09-18
卷号235期号:3页码:2900-2915
ISSN号0956-540X
关键词Numerical modelling Dynamics: convection currents and mantle plumes Dynamics of lithosphere and mantle Mantle processes
DOI10.1093/gji/ggad412
英文摘要Recent seismic observations have revealed diverse plume morphologies beneath hotspots that are characterized by multiple secondary plume branches with different sizes and temperatures. However, how the structures of these secondary plumes have developed and what controls the properties of these secondary plumes have not been well explored. Here, we performed 3-D numerical models to systematically investigate the effects of mantle viscosity structures and the strength of the 660-km phase change on the development of secondary plumes. We find that the characteristics of the secondary plumes, in terms of their numbers, excess temperatures and sizes, are controlled by the Clapeyron slope of the 660-km phase change (gamma(660)), the properties of the low-viscosity layer beneath the mantle transition zone (viscosity reduction ratio, thickness, depth or phase change dependency of viscosity) and the presence of the weak asthenosphere. For gamma(660) between -2.0 and -3.0 MPa K-1, the weak layer viscosity reduction ratio plays a first-order role in controlling secondary plume properties, that is, a smaller viscosity reduction ratio results in more secondary plumes, higher plume excess temperature and larger plume size. The thickness and viscosity dependencies of the weak layer have a secondary effect on secondary plume properties. However, a relatively small gamma(660) (e.g. -1.0 MPa K-1) would result in a single secondary plume irrespective of the weak layer viscosity reduction ratio, the viscosity dependency, and whether with or without the weak asthenosphere. However, our models also show that the presence of the weak asthenosphere has a prominent influence in increasing the number of secondary plumes but reducing the size of the plumes. Our results provide new insight into plume dynamics and suggest that the diverse plume structures observed in the upper mantle likely reflect different mantle viscosity structures beneath the hotspots.
WOS关键词SLAB STAGNATION ; JOINT INVERSION ; TRANSITION ZONE ; EARTHS MANTLE ; CONVECTION ; BENEATH ; SYSTEM ; BASE
资助项目International partnership program of Chinese Academy of Sciences[132A11KYSB20200019] ; National Natural Science Foundation of China (NSFC) ; Key Research Program of the Institute of Geology and Geophysics, CAS[41888101] ; Key Research Program of the Institute of Geology and Geophysics, CAS[92155204] ; Yunnan Fundamental Research Projects[42074105] ; Yunnan Fundamental Research Projects ; Research Start-up Project for Introduced Talent of Yunnan University ; [IGGCAS-201904] ; [IGGCAS-202204] ; [202301AT070119]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:001124759000021
资助机构International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; International partnership program of Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Yunnan Fundamental Research Projects ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University ; Research Start-up Project for Introduced Talent of Yunnan University
源URL[http://ir.iggcas.ac.cn/handle/132A11/111688]  
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Wang, Yongming
作者单位1.Univ Sci & Technol China, Sch Earth & Space Sci, Mengcheng Natl Geophys Observ, Hefei 230026, Peoples R China
2.Yunnan Univ, Sch Earth Sci, Kunming 650500, Yunnan, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Li, Yang,Wang, Yongming,Zhao, Liang,et al. The role of mantle viscosity heterogeneities on the development of secondary plumes in the upper mantle[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2023,235(3):2900-2915.
APA Li, Yang,Wang, Yongming,Zhao, Liang,Chen, Ling,&Huang, Jinshui.(2023).The role of mantle viscosity heterogeneities on the development of secondary plumes in the upper mantle.GEOPHYSICAL JOURNAL INTERNATIONAL,235(3),2900-2915.
MLA Li, Yang,et al."The role of mantle viscosity heterogeneities on the development of secondary plumes in the upper mantle".GEOPHYSICAL JOURNAL INTERNATIONAL 235.3(2023):2900-2915.

入库方式： OAI收割

来源：地质与地球物理研究所

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