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  4. 岩石圈演化国家重点实验室
Heterogeneous mantle beneath the Neo-Tethys Ocean revealed by ultramafic rocks from the Xiugugabu Ophiolite in the Yarlung-Tsangpo Suture Zone, southwestern Tibet

文献类型：期刊论文

作者Zhang, Chang1,3,5; Liu, Chuan-Zhou1,4,5; Benard, Antoine3; Muntener, Othmar3; Ji, Wen-Bin2; Liu, Tong1,5; Zhang, Zhen-Yu4,5; Zhang, Wei-Qi1,5; Wu, Fu-Yuan1,4,5
刊名CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
出版日期2023-08-01
卷号178期号:8页码:28
ISSN号0010-7999
关键词Indus-Yarlung-Tsangpo Suture Zone Xiugugabu Ophiolite Ultramafic Rocks Mantle Heterogeneity Neo-Tethys Ocean
DOI10.1007/s00410-023-02039-3
英文摘要Ultramafic rocks of the Yarlung-Tsangpo ophiolites (lherzolites, harzburgites, dunites and pyroxenites) have been interpreted as lithospheric mantle relics of the Cretaceous Neo-Tethys Ocean (NTO). Studying these rocks could provide key constraints on the NTO's evolution and invaluable information on sub-ridge mantle heterogeneity. The Xiugugabu ophiolite crops out in the western segment of the Yarlung-Tsangpo Suture Zone (YTSZ) and is dominantly composed of mantle components with minor crustal material. Here we report a comprehensive field, petrological and geochemical study of the ultramafic rocks from this ophiolitic massif. The lherzolites and harzburgites are less refractory than the Xigaze ultramafic rocks in the middle part of the YTSZ. Petrology and simple models are consistent with 10-20% fractional melting from an anhydrous, depleted mantle source, within the spinel and garnet stability fields. Part of dunites (Dunite-II) and pyroxenites formed during pervasive melt impregnation into host peridotites and record the modal and geochemical effects of post-melting melt-rock interactions. The discrepancy of light rare earth element (LREE) contents between whole rocks and their two pyroxene components in peridotites indicates that they have trapped interstitial melts along grain boundaries at a post-melting stage. These melts were potentially derived from shallow sources in spinel domains. Bulk rock osmium isotopic compositions suggest that the pyroxenites and part of the dunites are highly radiogenic. These enriched Os signatures are likely imposed by percolating melts derived from mantle sources hybridized by ancient recycled crustal materials. When comparing with results from previous studies of other YTSZ peridotites with ultra-depleted nature and unradiogenic Os isotopic compositions, we conclude that the sub-ridge mantle beneath the Neo-Tethyan Ocean was heterogeneous, with not only unradiogenic but also highly radiogenic mantle domains.
WOS关键词SUPRA-SUBDUCTION ZONE ; TRACE-ELEMENT FRACTIONATION ; OSMIUM ISOTOPIC CONSTRAINTS ; SPINEL OXYGEN GEOBAROMETER ; ABYSSAL PERIDOTITES ; OS-ISOTOPE ; LITHOSPHERIC MANTLE ; XIGAZE OPHIOLITE ; ORTHO-PYROXENE ; RIDGE BASALT
资助项目National Science Fund for Distinguished Young Scholars[42025201] ; National Key Research and Development Project of China[2020YFA0714801] ; Key Research Program of the Institute of Geology and Geophysics, CAS[IGGCAS-202202] ; National Natural Science Foundation of China[42272055] ; China Scholarship Council[201804910292] ; European Union[844795]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者SPRINGER
WOS记录号WOS:001040945500001
资助机构National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; European Union ; European Union ; European Union ; European Union ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; European Union ; European Union ; European Union ; European Union ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; European Union ; European Union ; European Union ; European Union ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Science Fund for Distinguished Young Scholars ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; Key Research Program of the Institute of Geology and Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; China Scholarship Council ; European Union ; European Union ; European Union ; European Union
源URL[http://ir.iggcas.ac.cn/handle/132A11/111347]  
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Zhang, Chang
作者单位1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
2.Northwest Univ, Dept Geol, Xian 710069, Shaanxi, Peoples R China
3.Univ Lausanne, Inst Earth Sci, CH-1015 Lausanne, Switzerland
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.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		 Zhang, Chang,Liu, Chuan-Zhou,Benard, Antoine,et al. Heterogeneous mantle beneath the Neo-Tethys Ocean revealed by ultramafic rocks from the Xiugugabu Ophiolite in the Yarlung-Tsangpo Suture Zone, southwestern Tibet[J]. CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,2023,178(8):28.
APA Zhang, Chang.,Liu, Chuan-Zhou.,Benard, Antoine.,Muntener, Othmar.,Ji, Wen-Bin.,...&Wu, Fu-Yuan.(2023).Heterogeneous mantle beneath the Neo-Tethys Ocean revealed by ultramafic rocks from the Xiugugabu Ophiolite in the Yarlung-Tsangpo Suture Zone, southwestern Tibet.CONTRIBUTIONS TO MINERALOGY AND PETROLOGY,178(8),28.
MLA Zhang, Chang,et al."Heterogeneous mantle beneath the Neo-Tethys Ocean revealed by ultramafic rocks from the Xiugugabu Ophiolite in the Yarlung-Tsangpo Suture Zone, southwestern Tibet".CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 178.8(2023):28.

入库方式： OAI收割

来源：地质与地球物理研究所

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