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Receiver function mapping of the mantle transition zone beneath the Western Alps: New constraints on slab subduction and mantle upwelling

文献类型：期刊论文

作者Liu, Dongyang2,3; Zhao, Liang2,3; Paul, Anne4; Yuan, Huaiyu5,6; Solarino, Stefano7; Aubert, Coralie4; Pondrelli, Silvia8; Salimbeni, Simone8; Eva, Elena7; Malusa, Marco G.1,7
刊名EARTH AND PLANETARY SCIENCE LETTERS
出版日期2022
卷号577页码:11
ISSN号0012-821X
关键词mantle transition zone subduction zone processes Western Alps mantle processes receiver functions
DOI10.1016/j.epsl.2021.117267
英文摘要To better constrain the deep structure and dynamics of the Western Alps, we studied the mantle transition zone (MTZ) structure using P-wave receiver functions (RFs). We obtained a total of 24904 RFs from 1182 events collected by 307 stations in the Western Alps. To illustrate the influence of the heterogeneity on the upper mantle velocity, we used both IASP91 and three-dimensional (3-D) velocity models to perform RF time-to-depth migration. We documented an MTZ thickening of about 40 km under the Western Alps and most of the Po Plain due to the uplift associated with the 410-km discontinuity and the depression associated with the 660-km discontinuity. Based upon the close spatial connection between the thickened MTZ and the location of the subducted slabs, we proposed that the thick MTZ was due to the subduction of the Alpine slab through the upper MTZ and the presence of remnants of subducted oceanic lithosphere in the MTZ. The uplift associated with the 410-km discontinuity provided independent evidence of the subduction depth of the Western Alps slab. In the Alpine foreland in eastern France, we observed localized arc-shaped thinning of the MTZ caused by a 12 km depression of the 410-km discontinuity, which has not been previously reported. This depression indicated a temperature increase of 120 K in the upper MTZ, and we proposed that it was caused by a small-scale mantle upwelling. Hardly any uplift of the 660 km discontinuity was observed, suggesting that the thermal anomaly was unlikely to be the result of a mantle plume. We observed that the thinning area of the MTZ corresponded to the area with the highest uplift rate in the Western Alps, which may have indicated that the temperature increase caused by the mantle upwelling contributed to the topographic uplift. (C) 2021 Elsevier B.V. All rights reserved.
WOS关键词EUROPE ; DISCONTINUITIES ; EXHUMATION ; VELOCITIES ; EXTENSION ; MODELS ; WATER
资助项目National Natural Science Foundation of China[41625016] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[91955210] ; National Key R&D Program of China[2017YFC0601206]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER
WOS记录号WOS:000716452700013
资助机构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 Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; 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 Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; 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 Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; 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 Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/103810]  
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Zhao, Liang
作者单位1.Univ Milano Bicocca, Dept Earth & Environm Sci, Milan, Italy
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Univ Grenoble Alpes, Univ Savoie Mt Blanc, ISTerre, CNRS,IRD,UGE, F-38000 Grenoble, France
5.Macquarie Univ, ARC Ctr Excellence Core Crust Fluid Syst, Dept Earth & Environm Sci, N Ryde, NSW, Australia
6.Univ Western Australia, Ctr Explorat Targeting, Sch Earth Sci, 35 Stirling Highway, Perth, WA 6009, Australia
7.Ist Nazl Geofis & Vulcanol, Osservatorio Nazl Terremoti, Genoa, Italy
8.Ist Nazl Geofis & Vulcanol, Via Donato Creti 12, I-40128 Bologna, Italy
推荐引用方式
GB/T 7714		 Liu, Dongyang,Zhao, Liang,Paul, Anne,et al. Receiver function mapping of the mantle transition zone beneath the Western Alps: New constraints on slab subduction and mantle upwelling[J]. EARTH AND PLANETARY SCIENCE LETTERS,2022,577:11.
APA Liu, Dongyang.,Zhao, Liang.,Paul, Anne.,Yuan, Huaiyu.,Solarino, Stefano.,...&Guillot, Stephane.(2022).Receiver function mapping of the mantle transition zone beneath the Western Alps: New constraints on slab subduction and mantle upwelling.EARTH AND PLANETARY SCIENCE LETTERS,577,11.
MLA Liu, Dongyang,et al."Receiver function mapping of the mantle transition zone beneath the Western Alps: New constraints on slab subduction and mantle upwelling".EARTH AND PLANETARY SCIENCE LETTERS 577(2022):11.

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来源：地质与地球物理研究所

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