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Heterogeneity of the Ailaoshan-Song Ma ophiolitic melange and its palaeogeographic implications for the evolution of Eastern Palaeo-Tethys

文献类型：期刊论文

作者Liu, Fei1,2,6; Lin, Wei1,6; Wang, Yin1,6; Meng, Lingtong1,6; Faure, Michel3; Nguyen, Vuong Van4; Wu, Qinying1,6; Chu, Yang1,6; Wei, Wei1,6; Thu, Hoai Luong Thi4
刊名TECTONOPHYSICS
出版日期2023-07-05
卷号858页码:17
ISSN号0040-1951
关键词Ailaoshan-Song Ma orogenic belt Matrix of the ophiolitic me ' lange Detrital zircon In-situ Hf isotopic content Spatial heterogeneity Eastern Palaeo-Tethys
DOI10.1016/j.tecto.2023.229848
英文摘要In comparison with ophiolite, ophiolitic me ' lange, especially its matrix, contains more information about the evolution of the relevant ocean. The evolution of the eastern Palaeo-Tethys recorded a whole Wilson cycle of numerous continental blocks such as the South China Block and Indochina Block, including rifting away from the Gondwana continent, subsequent northward migration and final collage with the Laurasia continent. Based on structural geology, detrital zircon, and related geochemical analyses, the Ailaoshan-Song Ma ophiolitic me ' lange can be divided into M1, M2, and M3 units with distinct detrital zircon age spectra and eHf(t) values suggesting for different provenances. These units are in faults-contact along the orogenic belt, indicating a strike-parallel heterogeneity of the ophiolitic me ' lange. To further understand the heterogeneity of these ophiolitic melanges, five samples from the matrix of the Ailaoshan ophiolitic melange were collected to be conducted detrital zircon U-Pb dating and Lu-Hf isotope analyses. All samples share the same zircon age spectrum, with two obvious age peaks at 430 and 960 Ma, which is comparable with the M1 unit. These results imply that the northwestern Ailaoshan ophiolitic me ' lange segment can be subdivided into M1 in the interior and M2 in the exterior rather than the previous division, indicating a strike-perpendicular heterogeneity. Based on their geometries (NE-dipping) and depositional ages (M1, 310-270 Ma; M2, 260-240 Ma), the elder M1 unit was thrusted upon the younger M2 unit, indicating a tectonic inversion. This inversion, which is associated with the whole geometry of the Ailaoshan belt, is ascribed to the transpressive deformation of the Cenozoic Red River Fault. These spatial heterogeneities well match the different evolutionary stages of the eastern Palaeo-Tethys.
WOS关键词ZIRCON U-PB ; INDO-CHINA BLOCK ; ARC/BACK-ARC ASSEMBLAGES ; PLATE TECTONIC CYCLE ; RIVER SHEAR ZONE ; SOUTH CHINA ; SW CHINA ; SUTURE ZONE ; NORTHERN VIETNAM ; NORTHEASTERN MARGIN
资助项目National Natural Science Foundation of China[91855212] ; National Natural Science Foundation of China[91855103] ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences[SKL-Z202205]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER
WOS记录号WOS:001001230900001
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 ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, 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 ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, 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 ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, 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 ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/110999]  
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Lin, Wei
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.China Geol Survey, Cent South China Innovat Ctr Geosci, Wuhan Ctr, Wuhan 430205, Peoples R China
3.Univ Orleans, Inst Sci Terre Orleans, UMR CNRS 7327, F-45067 Orleans 2, France
4.Vietnam Natl Univ, Univ Sci, Hanoi, Vietnam
5.China Geol Survey, Oil & Gas Resources Survey Ctr, Beijing 100083, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Innovat Acad Earth Sci, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Fei,Lin, Wei,Wang, Yin,et al. Heterogeneity of the Ailaoshan-Song Ma ophiolitic melange and its palaeogeographic implications for the evolution of Eastern Palaeo-Tethys[J]. TECTONOPHYSICS,2023,858:17.
APA Liu, Fei.,Lin, Wei.,Wang, Yin.,Meng, Lingtong.,Faure, Michel.,...&Chen, Ke.(2023).Heterogeneity of the Ailaoshan-Song Ma ophiolitic melange and its palaeogeographic implications for the evolution of Eastern Palaeo-Tethys.TECTONOPHYSICS,858,17.
MLA Liu, Fei,et al."Heterogeneity of the Ailaoshan-Song Ma ophiolitic melange and its palaeogeographic implications for the evolution of Eastern Palaeo-Tethys".TECTONOPHYSICS 858(2023):17.

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来源：地质与地球物理研究所

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