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  4. 岩石圈演化国家重点实验室
No mafic layer in 80 km thick Tibetan crust

文献类型：期刊论文

作者Wang, Gaochun3,4,5; Thybo, Hans1,2,8; Artemieva, Irina M.6,7,8
刊名NATURE COMMUNICATIONS
出版日期2021-02-16
卷号12期号:1页码:9
ISSN号2041-1723
DOI10.1038/s41467-021-21420-z
英文摘要All models of the magmatic and plate tectonic processes that create continental crust predict the presence of a mafic lower crust. Earlier proposed crustal doubling in Tibet and the Himalayas by underthrusting of the Indian plate requires the presence of a mafic layer with high seismic P-wave velocity (V-p>7.0km/s) above the Moho. Our new seismic data demonstrates that some of the thickest crust on Earth in the middle Lhasa Terrane has exceptionally low velocity (V-p<6.7km/s) throughout the whole 80km thick crust. Observed deep crustal earthquakes throughout the crustal column and thick lithosphere from seismic tomography imply low temperature crust. Therefore, the whole crust must consist of felsic rocks as any mafic layer would have high velocity unless the temperature of the crust were high. Our results form basis for alternative models for the formation of extremely thick juvenile crust with predominantly felsic composition in continental collision zones. Crustal doubling in Tibet and the Himalayas by underthrusting of the Indian plate is thought to require the presence of a mafic layer above the Moho. Here, the authors present seismic data which shows that the middle Lhasa Terrane has very low velocity (V-p<6.7km/s) throughout the 80km thick crust, which they suggest is predominantly felsic in composition.
资助项目National Key R&D Program of China[2016YFC0600301] ; National Science Foundation of China[92055210] ; Danish Research Council[DFF-1323-00053] ; Danish Research Council[FNU16-059776-15] ; MOST[GPMR2019010]
WOS研究方向Science & Technology - Other Topics
语种英语
WOS记录号WOS:000626756600007
出版者NATURE RESEARCH
资助机构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 Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Danish Research Council ; Danish Research Council ; Danish Research Council ; Danish Research Council ; MOST ; MOST ; MOST ; MOST ; 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 Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Danish Research Council ; Danish Research Council ; Danish Research Council ; Danish Research Council ; MOST ; MOST ; MOST ; MOST ; 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 Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Danish Research Council ; Danish Research Council ; Danish Research Council ; Danish Research Council ; MOST ; MOST ; MOST ; MOST ; 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 Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; Danish Research Council ; Danish Research Council ; Danish Research Council ; Danish Research Council ; MOST ; MOST ; MOST ; MOST
源URL[http://ir.iggcas.ac.cn/handle/132A11/101063]  
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Thybo, Hans; Artemieva, Irina M.
作者单位1.Istanbul Tech Univ, Eurasia Inst Earth Sci, Istanbul, Turkey
2.Univ Oslo, Ctr Earth Evolut & Dynam CEED, Oslo, Norway
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
6.GEOMAR Helmholtz Ctr Ocean Res, Marine Geodynam Sect, Kiel, Germany
7.Stanford Univ, Dept Geophys, Stanford, CA 94305 USA
8.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Gaochun,Thybo, Hans,Artemieva, Irina M.. No mafic layer in 80 km thick Tibetan crust[J]. NATURE COMMUNICATIONS,2021,12(1):9.
APA Wang, Gaochun,Thybo, Hans,&Artemieva, Irina M..(2021).No mafic layer in 80 km thick Tibetan crust.NATURE COMMUNICATIONS,12(1),9.
MLA Wang, Gaochun,et al."No mafic layer in 80 km thick Tibetan crust".NATURE COMMUNICATIONS 12.1(2021):9.

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来源：地质与地球物理研究所

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