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  4. 岩石圈演化国家重点实验室
The Xigaze ophiolite: fossil ultraslow-spreading ocean lithosphere in the Tibetan Plateau

文献类型：期刊论文

作者Liu, Tong6; Liu, Chuan-Zhou1,3,4,6; Wu, Fu-Yuan4,6; Dick, Henry J. B.2; Ji, Wen-Bin5; Zhang, Chang6; Zhang, Wei-Qi4,6; Zhang, Zhen-Yu4,6; Xu, Yang1
刊名JOURNAL OF THE GEOLOGICAL SOCIETY
出版日期2021-01-19
页码10
ISSN号0016-7649
DOI10.1144/jgs2020-208
英文摘要The crust and mantle both in ophiolites (fossil ocean lithosphere) and in modern oceans are enormously diverse. Along-axis morphology and lower crustal accretion at ultraslow-spreading ocean ridges are fundamentally different from those at faster-spreading ridges, and are critical to understanding how crustal accretion varies with spreading rate and magma supply. Ultraslow-spreading ridges provide analogues for ophiolites, to identify those that may have formed under similar conditions. Parallel studies of modern ocean lithosphere and ophiolites therefore can uniquely inform the origin and genesis of both. Here we report the results of structural and petrological studies on the Xigaze ophiolite in the Tibetan Plateau, and compare it with the morphology and deep drilling results at the ultraslow-spreading Southwest Indian Ridge. The Xigaze ophiolite has a complete but laterally discontinuous crust, with discrete diabase dykes and sills cutting both mantle and lower crust. The gabbro units are thin (c. 350 m) and show upward cyclic chemical variations, supporting for an episodic and intermittent magma supply. These features are comparable with the highly focused magmatism and low magma budget at modern ultraslow-spreading ridges. Thus we suggest that the Xigaze ophiolite represents an on-land analogue of ultraslow-spreading ocean lithosphere.
WOS关键词OMAN OPHIOLITE ; MAGMATIC ACCRETION ; TRANSITION ZONE ; CORE COMPLEXES ; GABBRO SILLS ; MANTLE ; RIDGE ; CRUST ; EVOLUTION ; TETHYAN
资助项目National Natural Science Foundation of China[41802062] ; National Natural Science Foundation of China[41673038] ; National Natural Science Foundation of China[91755000] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[QYZDB-SSW-DQC032]
WOS研究方向Geology
语种英语
WOS记录号WOS:000614227600001
出版者GEOLOGICAL SOC PUBL HOUSE
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 ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences 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 ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences 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 ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences 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 ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/100087]  
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, Tong; Liu, Chuan-Zhou
作者单位1.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
2.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Northwest Univ, Dept Geol, Xian 710069, Peoples R China
6.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, Tong,Liu, Chuan-Zhou,Wu, Fu-Yuan,et al. The Xigaze ophiolite: fossil ultraslow-spreading ocean lithosphere in the Tibetan Plateau[J]. JOURNAL OF THE GEOLOGICAL SOCIETY,2021:10.
APA Liu, Tong.,Liu, Chuan-Zhou.,Wu, Fu-Yuan.,Dick, Henry J. B..,Ji, Wen-Bin.,...&Xu, Yang.(2021).The Xigaze ophiolite: fossil ultraslow-spreading ocean lithosphere in the Tibetan Plateau.JOURNAL OF THE GEOLOGICAL SOCIETY,10.
MLA Liu, Tong,et al."The Xigaze ophiolite: fossil ultraslow-spreading ocean lithosphere in the Tibetan Plateau".JOURNAL OF THE GEOLOGICAL SOCIETY (2021):10.

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来源：地质与地球物理研究所

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