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Geochemistry and zircon U-Pb ages of the Neoproterozoic Shimian plutons on the western margin of the Yangtze Block, Sichuan Province

文献类型：期刊论文

作者Xie, Qi-Feng1,2; Cai, Yuan-Feng5; Zhai, Ming-Guo1,3,4
刊名GEOLOGICAL JOURNAL
出版日期2020-09-14
页码17
关键词monzogranite Neoproterozoic South China syenogranite U-Pb dating Yangtze Block
ISSN号0072-1050
DOI10.1002/gj.3969
英文摘要The Shimian Neoproterozoic plutons are located on the western margin of the Yangtze Block and are important for reconstructing the tectonic environment of this region. We present in situ zircon LA-ICP-MS U-Pb geochronological and Hf isotopic analyses for the plutons, as well as whole-rock major- and trace-element compositions. The monzogranite and syenogranite yield concordant ages of 773.6 +/- 5.6 Ma and 812.2 +/- 1.8 Ma, respectively, which indicates that they formed during the Tonian of the Neoproterozoic. The samples have very similar geochemistry, with high SiO2(71.45-75.46 wt%) and Al2O3(12.38-14.36 wt%) contents. The samples have a geochemical characteristics typical of peraluminous A-type granites, including high Ga/Al and Rb/Sr ratios and elevated contents of high-field-strength elements. The samples also display high Rb/Sr (13.9-23.0) and Rb/Nb (12.5-19.2) ratios. The monzogranite and syenogranite yield positive epsilon(Hf)(t) values (+1.6 to +9.4 and + 5.2 to +9.8, respectively) and T(2DM)ages of 1.54-1.22 Ga and 1.51-1.21 Ga, respectively, which indicates that they were derived from partial melting of Mesoproterozoic crust or contamination with upper mantle. We propose that the syenogranite and monzogranite formed in a syn-orogenic extensional setting during the Tonian period and that continuous subduction was responsible for the Neoproterozoic magmatic activities.
WOS关键词HF ISOTOPE COMPOSITION ; GARZE FOLD BELT ; A-TYPE GRANITES ; TRACE-ELEMENT ; LU-HF ; NORTHERN MARGIN ; TECTONIC EVOLUTION ; CHINA IMPLICATIONS ; TIBETAN PLATEAU ; YANBIAN TERRANE
资助项目Opening Foundation of State Key Laboratory for Mineral Deposits Research, Nanjing University[20-15-05] ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University
WOS研究方向Geology
语种英语
WOS记录号WOS:000568729300001
出版者WILEY
资助机构Opening Foundation of State Key Laboratory for Mineral Deposits Research, Nanjing University ; Opening Foundation of State Key Laboratory for Mineral Deposits Research, Nanjing University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory for Mineral Deposits Research, Nanjing University ; Opening Foundation of State Key Laboratory for Mineral Deposits Research, Nanjing University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory for Mineral Deposits Research, Nanjing University ; Opening Foundation of State Key Laboratory for Mineral Deposits Research, Nanjing University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory for Mineral Deposits Research, Nanjing University ; Opening Foundation of State Key Laboratory for Mineral Deposits Research, Nanjing University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University ; Opening Foundation of State Key Laboratory of Continental Dynamics, Northwest University
源URL[http://ir.iggcas.ac.cn/handle/132A11/98236]  
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Xie, Qi-Feng
作者单位1.Northwest Univ, State Key Lab Continent Dynam, Xian, Peoples R China
2.Fuzhou Univ, Coll Zijin Min, Fuzhou 350108, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
5.Nanjing Univ, State Key Lab Mineral Deposits Res, Nanjing, Peoples R China
推荐引用方式
GB/T 7714		 Xie, Qi-Feng,Cai, Yuan-Feng,Zhai, Ming-Guo. Geochemistry and zircon U-Pb ages of the Neoproterozoic Shimian plutons on the western margin of the Yangtze Block, Sichuan Province[J]. GEOLOGICAL JOURNAL,2020:17.
APA Xie, Qi-Feng,Cai, Yuan-Feng,&Zhai, Ming-Guo.(2020).Geochemistry and zircon U-Pb ages of the Neoproterozoic Shimian plutons on the western margin of the Yangtze Block, Sichuan Province.GEOLOGICAL JOURNAL,17.
MLA Xie, Qi-Feng,et al."Geochemistry and zircon U-Pb ages of the Neoproterozoic Shimian plutons on the western margin of the Yangtze Block, Sichuan Province".GEOLOGICAL JOURNAL (2020):17.

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来源：地质与地球物理研究所

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