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DOI | 10.1038/s41467-019-13720-2 |
Velocity and density characteristics of subducted oceanic crust and the origin of lower-mantle heterogeneities | |
Wang, Wenzhong1; Xu, Yinhan1; Sun, Daoyuan1,2; Ni, Sidao3; Wentzcovitch, Renata4,5,6; Wu, Zhongqing1,2 | |
2020-01-07 | |
发表期刊 | NATURE COMMUNICATIONS
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ISSN | 2041-1723 |
出版年 | 2020 |
卷号 | 11期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Seismic heterogeneities detected in the lower mantle were proposed to be related to subducted oceanic crust. However, the velocity and density of subducted oceanic crust at lower-mantle conditions remain unknown. Here, we report ab initio results for the elastic properties of calcium ferrite-type phases and determine the velocities and density of oceanic crust along different mantle geotherms. We find that the subducted oceanic crust shows a large negative shear velocity anomaly at the phase boundary between stishovite and CaCl2-type silica, which is highly consistent with the feature of mid-mantle scatterers. After this phase transition in silica, subducted oceanic crust will be visible as high-velocity heterogeneities as imaged by seismic tomography. This study suggests that the presence of subducted oceanic crust could provide good explanations for some lower-mantle seismic heterogeneities with different length scales except large low shear velocity provinces (LLSVPs). |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000511962900001 |
WOS关键词 | STISHOVITE PHASE-TRANSITION ; FERRITE TYPE-STRUCTURE ; MID-LOWER MANTLE ; BASALTIC CRUST ; ELASTIC PROPERTIES ; BENEATH ; PRESSURE ; NAALSIO4 ; BOUNDARY ; STATE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249940 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, Lab Seismol & Phys Earths Interior, Hefei, Peoples R China; 2.CAS Ctr Excellence Comparat Planetol, Hefei, Peoples R China; 3.Chinese Acad Sci, Inst Geodesy & Geophys, State Key Lab Geodesy & Earths Dynam, Wuhan 430077, Peoples R China; 4.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA; 5.Columbia Univ, Dept Earth & Environm Sci, New York, NY 10027 USA; 6.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA |
推荐引用方式 GB/T 7714 | Wang, Wenzhong,Xu, Yinhan,Sun, Daoyuan,et al. Velocity and density characteristics of subducted oceanic crust and the origin of lower-mantle heterogeneities[J]. NATURE COMMUNICATIONS,2020,11(1). |
APA | Wang, Wenzhong,Xu, Yinhan,Sun, Daoyuan,Ni, Sidao,Wentzcovitch, Renata,&Wu, Zhongqing.(2020).Velocity and density characteristics of subducted oceanic crust and the origin of lower-mantle heterogeneities.NATURE COMMUNICATIONS,11(1). |
MLA | Wang, Wenzhong,et al."Velocity and density characteristics of subducted oceanic crust and the origin of lower-mantle heterogeneities".NATURE COMMUNICATIONS 11.1(2020). |
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