The petrogenesis of the Jingde granodiorite and its MMEs: Constraints from geochemistry, zircon U-Pb dating and Hf isotopic compositions
文献类型：期刊论文
| 作者 | Zhang JunJie1,2; Wang GuangJie3; Yang XiaoYong4; Sun WeiDong1; Dai ShengQian5 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2012-12-01 |
| 卷号 | 28期号:12页码:4047-4063 |
| 关键词 | MME Zircon U-Pb dating Hf isotope Magma mingling Arc characteristics Jingde pluton South Anhui |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Petrographic features, whole-rock major and trace elements, zircon U-Pb dating and Hf isotopic compositions are reported for the granodiorite and its mafic microgranular enclaves (MMEs) from the Jingde pluton, South Anhui Province. The MMEs have classical igneous petrographic textures with abundant acicular apatites which indicate a rapid cooling process. The low Mg-# (<45) indicates that MMEs may not come from the mantle source. Zircon U-Pb dating yields an age of 139.7 +/- 1.3Ma for the host granodiorite and 142.3 +/- 1.7Ma for the MMEs, which are identical within analytical errors. The epsilon(Hf)(t) for host granodiorite ranges from -2.5 to 0.4, corresponding to crust Hf model ages (t(DM)(c)) of 1170 similar to 1350Ma. Similarly, the MMEs have epsilon(Hf)(t) of -5.2 similar to 1.8 and corresponding crust Hf model ages (t(DM)(c)) of 1090 similar to 1530Ma. Both spectra of Hf model age peak between 1.2 similar to 1.3Ga. The consistency of U-Pb age and the similar ranges of Hf isotope data indicate that the MMEs in granodiorite are formed by mingling of magmas from the same source, partial melting of crustal materials which likely formed during the Neoproterozoic convergence along the Jiang-Shao suture. On tectonic discrimination diagrams, Jingde granodiorite plots in the VAG region. In a Sr/Y versus Y diagram, Jingde granodiorite also plots in arc field. Its magma zirconium saturation temperature ranges between 630 degrees C and 680 degrees C and the Ce(IV)/Ce(III) of zircon ranges from 240 to 530. Low temperature and high oxygen fugacity are consistent with its arc characteristics. Considering the tectonic evolution of eastern China in the Early Cretaceous-Late Jurassic era, we proposed that the Jingde granodiorite was formed by lower crust partial melting triggered by slab rollback. |
| WOS关键词 | CARBONATE LIQUID IMMISCIBILITY ; IN-SITU ANALYSIS ; SOUTH CHINA ; MAFIC ENCLAVES ; GRANITIC-ROCKS ; PARTITION-COEFFICIENTS ; SOUTHEASTERN AUSTRALIA ; TECTONIC EVOLUTION ; VOLCANIC-ROCKS ; TRACE-ELEMENTS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000313315700020 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84068]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang JunJie |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China 5.Anhui Inst Geol Survey, Hefei 230001, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang JunJie,Wang GuangJie,Yang XiaoYong,et al. The petrogenesis of the Jingde granodiorite and its MMEs: Constraints from geochemistry, zircon U-Pb dating and Hf isotopic compositions[J]. ACTA PETROLOGICA SINICA,2012,28(12):4047-4063. |
| APA | Zhang JunJie,Wang GuangJie,Yang XiaoYong,Sun WeiDong,&Dai ShengQian.(2012).The petrogenesis of the Jingde granodiorite and its MMEs: Constraints from geochemistry, zircon U-Pb dating and Hf isotopic compositions.ACTA PETROLOGICA SINICA,28(12),4047-4063. |
| MLA | Zhang JunJie,et al."The petrogenesis of the Jingde granodiorite and its MMEs: Constraints from geochemistry, zircon U-Pb dating and Hf isotopic compositions".ACTA PETROLOGICA SINICA 28.12(2012):4047-4063. |
入库方式： OAI收割
来源：地质与地球物理研究所
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