Effects of the Compositional Viscosity Ratio on the Long-Term Evolution of Thermochemical Reservoirs in the Deep Mantle | |
Li, Yang3,4,5; Deschamps, Frederic2; Yang, Jianfeng3,4; Chen, Lin3,4; Zhao, Liang3,4; Tackley, Paul J.1 | |
刊名 | GEOPHYSICAL RESEARCH LETTERS |
2019-08-28 | |
卷号 | 46期号:16页码:9591-9601 |
ISSN号 | 0094-8276 |
DOI | 10.1029/2019GL083668 |
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. |
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关键词 | SHEAR-VELOCITY ; PRIMORDIAL RESERVOIRS ; TRAVEL-TIME ; NORMAL-MODE ; CONVECTION ; TOMOGRAPHY ; HEAT ; CONSTRAINTS ; HETEROGENEITIES ; GENERATION |
WOS研究方向 | Geology |
语种 | 英语 |
出版者 | AMER GEOPHYSICAL UNION |
WOS记录号 | WOS:000490966700033 |
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 |
内容类型 | 期刊论文 |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/93913] |
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 | 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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