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Perovskite U-Pb and Sr-Nd isotopic perspectives on melilitite magmatism and outward growth of the Tibetan Plateau

文献类型：期刊论文

作者Liu, Dong1,2; Zhao, Zhidan1,2; Niu, Yaoling1,2,3; Zhu, Di-Cheng1,2; Li, Xian-Hua4
刊名GEOLOGY
出版日期2018-12-01
卷号46期号:12页码:1027-1030
ISSN号0091-7613
DOI10.1130/G45329.1
英文摘要Mantle-derived alkaline magmatism along major strike-slip faults provides unique insights into the lateral growth of the Tibetan Plateau. Here we use the geochemistry of perovskites from the West Qinling melilitite to probe into the nature and dynamics of sub-lithospheric mantle beneath the northeastern Tibetan Plateau. The texture and chemical composition of perovskites indicate their early crystallization from a CO2-rich melilitite magma. Most perovskite crystals have moderately depleted Sr-Nd isotopic compositions, whereas a few grains exhibit high Sr-87/Sr-86(i) and low epsilon(Nd)(t). Together with the bulk-rock geochemistry of the melilitite, the perovskite Sr-Nd isotope data imply that the primary magma parental to the melilitite was most likely derived from seafloor subduction-modified asthenosphere and underwent interaction with lithospheric mantle during ascent. In situ U-Pb dating of the perovskites demonstrates the temporal correlation between the melilitite magmatism and Kunlun strike-slip faulting in the early Miocene. These findings indicate the fundamental role of India-Asia convergence in driving outward plateau growth through strike-slip extrusion and in reactivating long-lived lithospheric zones of weakness for evacuating low-volume asthenospheric melts.
WOS关键词MANTLE ; BENEATH ; KIMBERLITES ; UPLIFT ; MELTS
资助项目China 973 Program[2015CB452604] ; Natural Science Foundation of China[41802058] ; 111 project of China[B18048]
WOS研究方向Geology
语种英语
WOS记录号WOS:000451275100001
出版者GEOLOGICAL SOC AMER, INC
资助机构China 973 Program ; China 973 Program ; Natural Science Foundation of China ; Natural Science Foundation of China ; 111 project of China ; 111 project of China ; China 973 Program ; China 973 Program ; Natural Science Foundation of China ; Natural Science Foundation of China ; 111 project of China ; 111 project of China ; China 973 Program ; China 973 Program ; Natural Science Foundation of China ; Natural Science Foundation of China ; 111 project of China ; 111 project of China ; China 973 Program ; China 973 Program ; Natural Science Foundation of China ; Natural Science Foundation of China ; 111 project of China ; 111 project of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/89616]  
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Liu, Dong
作者单位1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
2.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
3.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Dong,Zhao, Zhidan,Niu, Yaoling,et al. Perovskite U-Pb and Sr-Nd isotopic perspectives on melilitite magmatism and outward growth of the Tibetan Plateau[J]. GEOLOGY,2018,46(12):1027-1030.
APA Liu, Dong,Zhao, Zhidan,Niu, Yaoling,Zhu, Di-Cheng,&Li, Xian-Hua.(2018).Perovskite U-Pb and Sr-Nd isotopic perspectives on melilitite magmatism and outward growth of the Tibetan Plateau.GEOLOGY,46(12),1027-1030.
MLA Liu, Dong,et al."Perovskite U-Pb and Sr-Nd isotopic perspectives on melilitite magmatism and outward growth of the Tibetan Plateau".GEOLOGY 46.12(2018):1027-1030.

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来源：地质与地球物理研究所

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