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

doi:10.1130/G45329.1

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Perovskite U-Pb and Sr-Nd isotopic perspectives on melilitite magmatism and outward growth of the Tibetan Plateau
	Liu, Dong 1,2; Zhao, Zhidan 1,2; Niu, Yaoling 1,2,3; Zhu, Di-Cheng 1,2; Li, Xian-Hua 4
刊名	GEOLOGY
	2018-12-01
卷号	46 期号:12 页码:1027-1030
ISSN号	0091-7613
DOI	10.1130/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.
资助项目	China 973 Program[2015CB452604] ; Natural Science Foundation of China[41802058] ; 111 project of China[B18048]
WOS关键词	MANTLE ; BENEATH ; KIMBERLITES ; UPLIFT ; MELTS
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:000451275100001
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
内容类型	期刊论文
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.