The water-poor and reduced mantle beneath the Neo-Tethys Ocean: Tectonic setting of the western Yarlung-Tsangpo ophiolites
文献类型：期刊论文
| 作者 | Zhang, Zhen1,3; Liu, Tong1,3; Liu, Chuan-Zhou1,2,3; Jung, Sejin4; Jung, Haemyeong4 |
| 刊名 | LITHOS
 |
| 出版日期 | 2023-11-01 |
| 卷号 | 456页码:17 |
| 关键词 | Neo-Tethys Ocean Yarlung-Tsangpo suture zone Cuobuzha ophiolite Water content Microstructure Tectonic setting |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2023.107326 |
| 英文摘要 | Water contents and deformation behaviors of minerals in mantle peridotites are diagnostic features to distinguish the physical conditions between mid-ocean ridges and subduction zones, which could serve as effective indicators for discriminating the tectonic setting of ophiolites. In this study, we report a systematic dataset of petrology, geochemistry, water contents and deformation behaviors for the mantle peridotites from the Cuobuzha ophiolite in the western Yarlung-Tsangpo suture zone (YTSZ), southern Tibet, to provide new insights into the long-standing debate for the tectonic setting of ophiolites therein. Geochemical data revealed that the Cuobuzha mantle peridotites experienced low to moderate degrees of partial melting (similar to 10-15%), although some harzburgites have been intensively modified by late-stage melt-rock interactions. The Cuobuzha peridotites, on the other hand, are characterized by low orthopyroxene water contents (46-95 wt ppm in average), clear olivine crystallographic preferred orientations of A- and E-types, and low oxygen fugacity (logf(O2), QFM -2.55 to -0.81, where QFM means quartz-magnetite-fayalite buffer), thus indicative of the occurrence of high-temperature, water-depleted, and reduced mantle in this ophiolite. The features above of the Cuobuzha mantle peridotites are quite similar to those of abyssal peridotites at modern mid-ocean ridges and systematically different from the relatively refractory, water-rich, and oxidized characteristics typical of forearc peridotites in suprasubduction zones. Based on the data from this study and a compiled dataset for other ophiolites from the western YTSZ, we revealed that mantle peridotites with a water-poor and reduced nature are common in these ophiolites, thus providing strong evidence supporting for their origination from a mid-ocean ridge of a mature ocean basin. From the perspective of mantle peridotites, the ophiolites in the western YTSZ now geographically distributed in two branches (i.e., the northern and southern sub-belts) might have formed in a single ocean basin of the Neo-Tethys and were dismembered by late-stage tectonic events to their current locations. |
| WOS关键词 | MARIANA FORE-ARC ; ORTHO-PYROXENE ; MELT EXTRACTION ; ABYSSAL PERIDOTITES ; SEISMIC ANISOTROPY ; XIGAZE OPHIOLITE ; SUBDUCTION ZONE ; CHROMIAN SPINEL ; DEPLETED MORB ; GAKKEL RIDGE |
| 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 Research Foundation of Korea[NRF: 2020R1A2C2003765] ; National Research Foundation of Korea[2022R1A5A1085103] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001070465000001 |
| 出版者 | ELSEVIER |
| 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 Research Foundation of Korea ; National Research Foundation of Korea ; National Research Foundation of Korea ; National Research Foundation of Korea ; 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 Research Foundation of Korea ; National Research Foundation of Korea ; National Research Foundation of Korea ; National Research Foundation of Korea ; 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 Research Foundation of Korea ; National Research Foundation of Korea ; National Research Foundation of Korea ; National Research Foundation of Korea ; 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 Research Foundation of Korea ; National Research Foundation of Korea ; National Research Foundation of Korea ; National Research Foundation of Korea |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110808]  |
| 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.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Seoul Natl Univ, Sch Earth & Environm Sci, Tectonophys Lab, Seoul 08826, South Korea |
| 推荐引用方式 GB/T 7714 | Zhang, Zhen,Liu, Tong,Liu, Chuan-Zhou,et al. The water-poor and reduced mantle beneath the Neo-Tethys Ocean: Tectonic setting of the western Yarlung-Tsangpo ophiolites[J]. LITHOS,2023,456:17. |
| APA | Zhang, Zhen,Liu, Tong,Liu, Chuan-Zhou,Jung, Sejin,&Jung, Haemyeong.(2023).The water-poor and reduced mantle beneath the Neo-Tethys Ocean: Tectonic setting of the western Yarlung-Tsangpo ophiolites.LITHOS,456,17. |
| MLA | Zhang, Zhen,et al."The water-poor and reduced mantle beneath the Neo-Tethys Ocean: Tectonic setting of the western Yarlung-Tsangpo ophiolites".LITHOS 456(2023):17. |
入库方式： OAI收割
来源：地质与地球物理研究所
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