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  2. 地质与地球物理研究所
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  4. 中国科学院地球与行星物理重点实验室
Distinct slab interfaces imaged within the mantle transition zone

文献类型：期刊论文

作者Wang, Xin10,11; Chen, Qi-Fu9; Niu, Fenglin6,7,8; Wei, Shengji4,5; Ning, Jieyuan3; Li, Juan9,11; Wang, Weijun2; Buchen, Johannes10; Liu, Lijun1
刊名NATURE GEOSCIENCE
出版日期2020-11-09
页码18
ISSN号1752-0894
DOI10.1038/s41561-020-00653-5
英文摘要Two seismic discontinuities in the mantle transition zone beneath the western Pacific represent subducted slab interfaces that could be the slab Moho and partially molten sub-slab asthenosphere, according to an analysis of seismic data. Oceanic lithosphere descends into Earth's mantle at subduction zones and drives material exchange between Earth's surface and its deep interior. The subduction process creates chemical and thermal heterogeneities in the mantle, with the strongest gradients located at the interfaces between subducted slabs and the surrounding mantle. Seismic imaging of slab interfaces is key to understanding slab compositional layering, deep-water cycling and melting, yet the existence of slab interfaces below 200 km remains unconfirmed. Here, we observe two sharp and slightly dipping seismic discontinuities within the mantle transition zone beneath the western Pacific subduction zone that coincide spatially with the upper and lower bounds of the high-velocity slab. Based on a multi-frequency receiver function waveform modelling, we found the upper discontinuity to be consistent with the Mohorovicic discontinuity of the subducted oceanic lithosphere in the mantle transition zone. The lower discontinuity could be caused by partial melting of sub-slab asthenosphere under hydrous conditions in the seaward portion of the slab. Our observations show distinct slab-mantle boundaries at depths between 410 and 660 km, deeper than previously observed, suggesting a compositionally layered slab and high water contents beneath the slab.
WOS关键词SINGLE-CRYSTAL ELASTICITY ; LOW-VELOCITY LAYER ; SEISMIC EVIDENCE ; WATER ; BENEATH ; DISCONTINUITY ; DEEP ; TRANSPORTATION ; RINGWOODITE ; TEMPERATURE
资助项目Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB18000000] ; National Natural Science Foundation of China[91958209] ; National Natural Science Foundation of China[41974057] ; National Natural Science Foundation of China[41130316] ; National Natural Science Foundation of China[41630209] ; National Science Foundation's Collaborative Study of Earth's Deep Interior[EAR-1161046] ; National Science Foundation's Collaborative Study of Earth's Deep Interior[EAR-2009935]
WOS研究方向Geology
语种英语
WOS记录号WOS:000588017700001
出版者NATURE RESEARCH
资助机构Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; 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 Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; 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 Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; 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 Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences ; 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 Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior ; National Science Foundation's Collaborative Study of Earth's Deep Interior
源URL[http://ir.iggcas.ac.cn/handle/132A11/98678]  
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
通讯作者Chen, Qi-Fu; Niu, Fenglin
作者单位1.Univ Illinois, Dept Geol, Urbana, IL USA
2.China Earthquake Adm, Inst Earthquake Forecasting, Beijing, Peoples R China
3.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China
4.Nanyang Technol Univ, Asian Sch Environm, Singapore, Singapore
5.Nanyang Technol Univ, Earth Observ Singapore, Singapore, Singapore
6.China Univ Petr, Unconvent Petr Res Inst, Beijing, Peoples R China
7.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing, Peoples R China
8.Rice Univ, Dept Earth Environm & Planetary Sci, Houston, TX 77005 USA
9.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
10.CALTECH, Seismol Lab, Pasadena, CA 91125 USA
推荐引用方式
GB/T 7714		 Wang, Xin,Chen, Qi-Fu,Niu, Fenglin,et al. Distinct slab interfaces imaged within the mantle transition zone[J]. NATURE GEOSCIENCE,2020:18.
APA Wang, Xin.,Chen, Qi-Fu.,Niu, Fenglin.,Wei, Shengji.,Ning, Jieyuan.,...&Liu, Lijun.(2020).Distinct slab interfaces imaged within the mantle transition zone.NATURE GEOSCIENCE,18.
MLA Wang, Xin,et al."Distinct slab interfaces imaged within the mantle transition zone".NATURE GEOSCIENCE (2020):18.

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来源：地质与地球物理研究所

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