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  4. 岩石圈演化国家重点实验室
Variably evolved gabbroic intrusions within the Xigaze ophiolite (Tibet): new insights into the origin of ophiolite diversity

文献类型：期刊论文

作者Liu, Tong1,2; Wu, Fu-Yuan1,2,3; Liu, Chuan-Zhou1,2,3,4; Tribuzio, Riccardo5; Ji, Wen-Bin1; Zhang, Chang1; Xu, Yang1; Zhang, Wei-Qi1
刊名CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
出版日期2018-11-01
卷号173期号:11页码:21
关键词Gabbroic rock Xigaze ophiolite Tibet Spreading rate Ophiolite diversity
ISSN号0010-7999
DOI10.1007/s00410-018-1518-6
英文摘要Ophiolites worldwide show striking diversities in their rock assemblage and structure (i.e., ophiolite diversity), raising a question whether ophiolites are originally similar before intense tectonic dismemberment. Comparison between ophiolites and oceanic lithospheres at modern mid-ocean ridges may provide key constraints on the origin of ophiolite diversity, because oceanic lithospheric structures are inherently controlled by spreading rates. Here, we present a case study of the Xigaze ophiolite in southern Tibet focusing on its gabbroic intrusions outcropping in three localities, i.e., Dazhuqu, Baigang and Jiding. Compared to the Jiding sequence, the Dazhuqu and Baigang gabbroic rocks are less evolved, characterized by higher Cr2O3 contents but lower contents of TiO2 and rare earth element in both clinopyroxene and bulk compositions. It is evident, hence, that the Xigaze ophiolite is characterized by variably evolved and discontinuously distributed gabbroic intrusions, rather by a continuous lower oceanic crust between the mantle and sheeted dike complex as the Penrose-type ophiolites. Our study, along with the identification in previous studies of oceanic detachment faults within the Xigaze ophiolite, demonstrates that the Xigaze ophiolite shows close similarities to oceanic lithospheres at modern slow- and ultraslow-spreading ridges. Hence, the significant structural distinctions between the Xigaze ophiolite and the Penrose-type ophiolites (e.g., the Oman ophiolite) may be inherently associated with different spreading rates of paleo-ridges. Considering the limited scale of the Xigaze gabbroic rocks, here we suggest the Xigaze ophiolite as a typical representative of fossil ultraslow-spreading ridges.
WOS关键词ZANGBO SUTURE ZONE ; LOWER OCEANIC-CRUST ; MID-ATLANTIC RIDGE ; EAST PACIFIC RISE ; SLOW-SPREADING RIDGES ; ALPINE JURASSIC OPHIOLITES ; SOUTHWEST INDIAN RIDGE ; MELT-ROCK REACTION ; SOUTHERN TIBET ; MAGMA CHAMBER
资助项目National Natural Science Foundation of China[41673038] ; National Natural Science Foundation of China[41521062] ; National Natural Science Foundation of China[41602054] ; Key Research Program of Frontier Sciences from Chinese Academy of Sciences[QYZDB-SSW-DQC032] ; Open Fund Project of State Key Laboratory of Lithospheric Evolution[K201707]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000448146100005
出版者SPRINGER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences from Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from Chinese Academy of Sciences ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences from Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from Chinese Academy of Sciences ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences from Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from Chinese Academy of Sciences ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences from Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from Chinese Academy of Sciences ; Open Fund Project of State Key Laboratory of Lithospheric Evolution ; Open Fund Project of State Key Laboratory of Lithospheric Evolution
源URL[http://ir.iggcas.ac.cn/handle/132A11/89127]  
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
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Univ Pavia, Dipartimento Sci Terra & Ambiente, Via Ferrata 1, I-27100 Pavia, Italy
推荐引用方式
GB/T 7714		 Liu, Tong,Wu, Fu-Yuan,Liu, Chuan-Zhou,et al. Variably evolved gabbroic intrusions within the Xigaze ophiolite (Tibet): new insights into the origin of ophiolite diversity[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,2018,173(11):21.
APA Liu, Tong.,Wu, Fu-Yuan.,Liu, Chuan-Zhou.,Tribuzio, Riccardo.,Ji, Wen-Bin.,...&Zhang, Wei-Qi.(2018).Variably evolved gabbroic intrusions within the Xigaze ophiolite (Tibet): new insights into the origin of ophiolite diversity.CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,173(11),21.
MLA Liu, Tong,et al."Variably evolved gabbroic intrusions within the Xigaze ophiolite (Tibet): new insights into the origin of ophiolite diversity".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 173.11(2018):21.

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来源：地质与地球物理研究所

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