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From arc accretion to continental collision in the eastern Jiangnan Orogen: Evidence from two phases of S-type granites
Wang, Xin-Shui1,2,3; Gao, Jun1,2,4; Klemd, Reiner3; Jiang, Tuo5; Zhai, Qing-Guo6; Li, Ji-Lei1,2; Liang, Xin-Quan7
2019-02-01
Source PublicationPRECAMBRIAN RESEARCH
ISSN0301-9268
Volume321Pages:199-211
AbstractThe NE Jiangxi ophiolitic m lange separates the Huaiyu and Jiuling terranes in the eastern Jiangnan Orogen of the South China Block. Two phases of S-type granites, which are geochemically and mineralogically similar to the Himalayan leucogranites, are newly recognized in mantle peridotites of the NE Jiangxi ophiolite. The first phase, a tourmaline-bearing granite porphyry, has a SIMS zircon U-Pb age of 904.4 +/- 4.8 Ma and is strongly enriched in K2O (4.00-4.26 wt%) and strongly peraluminous (A/CNK = 2.94-3.24). It further shows high Rb/Sr ratios and highly fractionated REE patterns, indicating an origin due to fluid-absent melting of metapelites at relatively high temperatures. The granite porphyry exhibits highly evolved zircon Hf ( -6.0 to -1.0) and whole rock Nd ( -4.2 to -5.1) isotopes, which is in contrast to juvenile-derived magmatic rocks in the Huaiyu Terrane. We thus propose that the granite porphyry was formed by melting of the metapelites sourced from the Yangtze Block subsequent to the accretion of the Huaiyu arc to the Jiuling Terrane (the continental margin of the Yangtze Block). The second phase, a muscovite-bearing quartz porphyry, is strongly peraluminous (A/CNK = 1.29-1.34) with low CaO/Na2O ratios (0.11-0.14) and low FeOt + MgO + TiO2 contents (2.39-2.75 wt%), similar to melts derived from fluid-fluxed melting of metapelites. Zircon grains from the quartz porphyry yielded U-Pb ages of ca. 803-801 Ma with mainly positive epsilon(tif)(t) values ( + 1.9 to + 8.7), which are younger than the depositional ages of the basement sequences and nearly identical to the accumulation of the overlying unmetamorphosed cover in the Jiangnan Orogen. Therefore, it is suggested that the quartz porphyry was formed in a post-collisional extensional setting subsequent to the final assembly of the Yangtze and Cathaysia blocks. In conjunction with published data, we conclude that multiple subduction-accretion events may have been involved in the formation of the South China Block during Neoproterozoic times.
KeywordSouth China Jiangnan Orogen S-type granite Strongly peraluminous NE Jiangxi ophiolite
DOI10.1016/j.precamres.2018.12.010
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; CSC-DAAD Postdoc Scholarship Program (CSC) ; CSC-DAAD Postdoc Scholarship Program (CSC) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; CSC-DAAD Postdoc Scholarship Program (CSC) ; CSC-DAAD Postdoc Scholarship Program (CSC) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; CSC-DAAD Postdoc Scholarship Program (CSC) ; CSC-DAAD Postdoc Scholarship Program (CSC) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; CSC-DAAD Postdoc Scholarship Program (CSC) ; CSC-DAAD Postdoc Scholarship Program (CSC)
WOS KeywordSHRIMP U-PB ; NEOPROTEROZOIC TECTONIC EVOLUTION ; SOUTH CHINA CONSTRAINTS ; SOUTHEASTERN YANGTZE BLOCK ; HF ISOTOPIC COMPOSITIONS ; GEOCHEMICAL EVIDENCE ; LU-HF ; CATHAYSIA BLOCK ; PERALUMINOUS GRANITOIDS ; VOLCANIC-ROCKS
Language英语
Funding ProjectNational Natural Science Foundation of China[41172200] ; China Geological Survey[DD20160345] ; CSC-DAAD Postdoc Scholarship Program (CSC)[201709920072]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; CSC-DAAD Postdoc Scholarship Program (CSC) ; CSC-DAAD Postdoc Scholarship Program (CSC) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; CSC-DAAD Postdoc Scholarship Program (CSC) ; CSC-DAAD Postdoc Scholarship Program (CSC) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; CSC-DAAD Postdoc Scholarship Program (CSC) ; CSC-DAAD Postdoc Scholarship Program (CSC) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; CSC-DAAD Postdoc Scholarship Program (CSC) ; CSC-DAAD Postdoc Scholarship Program (CSC)
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000457657500012
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90513
Collection矿产资源研究院重点实验室
Corresponding AuthorWang, Xin-Shui; Gao, Jun
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Erlangen Nurnberg, GeoZentrum Nordbayern, D-91054 Erlangen, Germany
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.China Geol Survey, Wuhan Ctr, Lab Isotope Geochem, Wuhan 430205, Hubei, Peoples R China
6.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
7.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xin-Shui,Gao, Jun,Klemd, Reiner,et al. From arc accretion to continental collision in the eastern Jiangnan Orogen: Evidence from two phases of S-type granites[J]. PRECAMBRIAN RESEARCH,2019,321:199-211.
APA Wang, Xin-Shui.,Gao, Jun.,Klemd, Reiner.,Jiang, Tuo.,Zhai, Qing-Guo.,...&Liang, Xin-Quan.(2019).From arc accretion to continental collision in the eastern Jiangnan Orogen: Evidence from two phases of S-type granites.PRECAMBRIAN RESEARCH,321,199-211.
MLA Wang, Xin-Shui,et al."From arc accretion to continental collision in the eastern Jiangnan Orogen: Evidence from two phases of S-type granites".PRECAMBRIAN RESEARCH 321(2019):199-211.
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