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
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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 |
DOI | 10.1002/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. |
入库方式: OAI收割
来源:地质与地球物理研究所
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