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Effects of the Compositional Viscosity Ratio on the Long-Term Evolution of Thermochemical Reservoirs in the Deep Mantle

文献类型：期刊论文

作者Li, Yang3,4,5; Deschamps, Frederic2; Yang, Jianfeng3,4; Chen, Lin3,4; Zhao, Liang3,4; Tackley, Paul J.1
刊名GEOPHYSICAL RESEARCH LETTERS
出版日期2019-08-28
卷号46期号:16页码:9591-9601
ISSN号0094-8276
DOI10.1029/2019GL083668
英文摘要Numerical experiments of thermochemical mantle convection in 2-D spherical annulus geometry are performed to investigate the effects of compositional viscosity ratio (Delta eta(C)) on the long-term evolution of reservoirs of dense, primordial material in the lowermost mantle of the Earth. The internal heating rate in the primordial material is larger than in the ambient mantle by a factor of 10, accounting for the fact that this material may be enriched in radiogenic elements. We find that if the chemical density contrast is large (128 kg/m(3)), Delta eta(C) plays only a second-order role on the long-term stability of these reservoirs. As the chemical density contrast decreases to smaller values (90 kg/m(3)), Delta eta(C) plays a more significant role. More specifically, when Delta eta(C) is large, around 10 or larger, convection within the reservoirs of primordial material is less vigorous, which increases the temperature and thermal buoyancy of these structures. This, in turn, can eventually lead them to become unstable, with the majority of the primordial material being advected into the large-scale mantle circulation.
WOS关键词SHEAR-VELOCITY ; PRIMORDIAL RESERVOIRS ; TRAVEL-TIME ; NORMAL-MODE ; CONVECTION ; TOMOGRAPHY ; HEAT ; CONSTRAINTS ; HETEROGENEITIES ; GENERATION
资助项目National Natural Science Foundation of China (NSFC)[41888101] ; National Natural Science Foundation of China (NSFC)[41704100] ; National Natural Science Foundation of China (NSFC)[41625016] ; Strategic Priority Research Program (B) of Chinese Academy of Sciences[XDB18000000] ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; Academia Sinica Investigator Award[AS-IA-108-M03]
WOS研究方向Geology
语种英语
WOS记录号WOS:000490966700033
出版者AMER GEOPHYSICAL UNION
资助机构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) ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; 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) ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; 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) ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; 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) ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; CAS Pioneer Hundred Talents Program, Chinese Academy of Sciences ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award ; Academia Sinica Investigator Award
源URL[http://ir.iggcas.ac.cn/handle/132A11/93913]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
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Li, Yang; Deschamps, Frederic
作者单位1.Swiss Fed Inst Technol, Dept Earth Sci, Inst Geophys, Zurich, Switzerland
2.Acad Sinica, Inst Earth Sci, Taipei, Taiwan
3.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher & Evolut, Beijing, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Yang,Deschamps, Frederic,Yang, Jianfeng,et al. Effects of the Compositional Viscosity Ratio on the Long-Term Evolution of Thermochemical Reservoirs in the Deep Mantle[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(16):9591-9601.
APA Li, Yang,Deschamps, Frederic,Yang, Jianfeng,Chen, Lin,Zhao, Liang,&Tackley, Paul J..(2019).Effects of the Compositional Viscosity Ratio on the Long-Term Evolution of Thermochemical Reservoirs in the Deep Mantle.GEOPHYSICAL RESEARCH LETTERS,46(16),9591-9601.
MLA Li, Yang,et al."Effects of the Compositional Viscosity Ratio on the Long-Term Evolution of Thermochemical Reservoirs in the Deep Mantle".GEOPHYSICAL RESEARCH LETTERS 46.16(2019):9591-9601.

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来源：地质与地球物理研究所

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