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Petrogenesis and tectonic setting of the Wulong two-mica monzogranite on Liaodong Peninsula, NE China: Constraints from zircon U-Pb and Hf-O isotopic data

文献类型：期刊论文

作者Wang, Yongbin2,3; Yu, Bing3,4; Zeng, Qingdong3,4; Guo, Weikang3,4; Yang, Jinhui1; Meng, Qingren1
刊名GEOCHEMICAL JOURNAL
出版日期2019
卷号53期号:4页码:261-279
ISSN号0016-7002
关键词zircon U-Pb age element geochemistry Hf-O isotopic composition Liaodong Peninsula North China Craton
DOI10.2343/geochemj.2.0564
英文摘要The petrogenesis and tectonic setting of Middle-Late Jurassic granitoids on Liaodong Peninsula, NE China, are debated. To resolve these uncertainties, this study analyzed geochemistry, zircon U-Pb ages and Hf-O isotopic compositions of the Wulong two-mica monzogranite on the Liaodong peninsula. Zircon U-Pb ages indicate that the Wulong monzogranite was intruded at ca. 168-162 Ma, and included an inherited population of Paleoproterozoic zircon grains (ca. 2.5-2.0 Ga). Wulong monzogranite is characterized by quartz, plagioclase, K-feldspar and minor muscovite and biotite. This S-type granitic intrusion has high SiO2 (>70 wt.%) contents, is high-K calc-alkaline, shows high zircon delta O-18 values (>7.5 parts per thousand), and is weakly peraluminous (A/CNK = 1.01-1.08). The relatively low Sm/Nd (0.13-0.21), Rb/Sr (0.17-0.53) and FeOT/MgO (2.54-8.51) ratios suggest that Wulong monzogranite is weakly fractionated. Geochemical characteristics indicate that the monzogranite is probably derived from partial melting of a clay-poor, plagioclase- and biotite-rich psammitic source, such as metasedimentary rocks of the North China Craton. Moreover, the Wulong monzogranite displays high initial Sr-87/(86)5r ratios (0.7099-0.7181), delta O-18 values (7.8-9.4 parts per thousand), low epsilon(Hf)(t) values (-34.7 to -23.0) with two-stage Hf model ages (T-DM2) of 2.67-3.40 Ga and epsilon(Nd)(t) (-24.9 to -21.2) values with two-stage Nd model ages (T-DM2) of 2.67-2.96 Ga, suggesting that they may be the product of the melting of the Neoarchen-Paleoproterozoic metasedimentary basement of the North China Craton. Zircon saturation temperature and Ti-in-zircon thermometry indicate that Wulong monzogranite formed at similar to 700 degrees C, and high Sr/Y ratio and low HREE imply it was formed at depths within the stability field of garnet in a thickened crust. Taking the regional tectonic and magmatic activities into account, it is proposed that the Wulong monzogranite was generated in an active continental margin that involved the subduction of the Izanagi slab during the Middle-Late Jurassic.
WOS关键词S-TYPE GRANITES ; WULAGA GOLD DEPOSIT ; A-TYPE GRANITES ; NORTH CHINA ; TRACE-ELEMENT ; LU-HF ; GEOCHEMICAL CONSTRAINTS ; MOLYBDENUM DEPOSITS ; CRATON IMPLICATIONS ; JURASSIC GRANITES
资助项目National Key R&D Program of China[2016YFC0600109] ; National Key R&D Program of China[201604910054]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者GEOCHEMICAL SOC JAPAN
WOS记录号WOS:000541383200004
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/97163]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
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Wang, Yongbin
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.Aarhus Univ, Dept Earth Sci, Hoegh Guldbergs Cade 2, DK-8000 Aarhus C, Denmark
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Yongbin,Yu, Bing,Zeng, Qingdong,et al. Petrogenesis and tectonic setting of the Wulong two-mica monzogranite on Liaodong Peninsula, NE China: Constraints from zircon U-Pb and Hf-O isotopic data[J]. GEOCHEMICAL JOURNAL,2019,53(4):261-279.
APA Wang, Yongbin,Yu, Bing,Zeng, Qingdong,Guo, Weikang,Yang, Jinhui,&Meng, Qingren.(2019).Petrogenesis and tectonic setting of the Wulong two-mica monzogranite on Liaodong Peninsula, NE China: Constraints from zircon U-Pb and Hf-O isotopic data.GEOCHEMICAL JOURNAL,53(4),261-279.
MLA Wang, Yongbin,et al."Petrogenesis and tectonic setting of the Wulong two-mica monzogranite on Liaodong Peninsula, NE China: Constraints from zircon U-Pb and Hf-O isotopic data".GEOCHEMICAL JOURNAL 53.4(2019):261-279.

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来源：地质与地球物理研究所

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