Geochronology, petrogenesis and tectonic implications of Jurassic granites in the Liaodong Peninsula, NE China
文献类型：期刊论文
| 作者 | Wu, FY; Yang, JH; Wilde, SA; Zhang, XO |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2005-09-05 |
| 卷号 | 221期号:1-2页码:127-156 |
| 关键词 | Magmatic Underplating Granites Jurassic Liaodong Peninsula Eastern China Delamination |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2005.04.010 |
| 文献子类 | Article |
| 英文摘要 | Mesozoic igneous rocks are widespread throughout eastern China, but precise geochronological and petrogenetic constraints were previously lacking. Ten samples from the Liaodong Peninsula in northeastern China were chosen for zircon U-Pb SHRIMP and laser ablation ICP-MS dating. The magmatic ages range from 179 +/- 3 to 156 +/- 3 Ma. Data compilation indicates that contemporaneous granitic magmatism is widespread throughout eastern China, establishing the Jurassic as an important period of igneous activity in eastern China. Petrographically, these granites can be divided into three groups that underwent a complex history of crystal fractionation. Two end-members of granodioritic and monzogranitic magma are identified. The granodioritic rocks, having lower (Sr-87/ Sr-86)(i) and higher epsilon(Nd)(t) values than those of the monzogranitic rocks, came from the partial melting of juvenile crust, whereas the monzogranitic rocks came from partial melting of the Precambrian basement. It is proposed that Pacific plate subduction resulted in crustal thickening and subsequent lithospheric delamination which resulted in the upwelling of asthenospheric mantle and formation of juvenile crust by underplating of mantle-derived magma in the lower crust. A subsequent underplating and heating event from the asthenosphere partially melted the overlying pre-existing underplated mafic rocks and ancient crust, leading to the formation of granodioritic and monzogranitic magmas. This thickening by subduction could have been a necessary precursor for limited delamination in the Jurassic and more extensive delarnination in the Early Cretaceous. (c) 2005 Elsevier B.V. All rights reserved. |
| WOS关键词 | U-PB ZIRCON ; PLASMA-MASS SPECTROMETRY ; MESOZOIC IGNEOUS ROCKS ; NORTH CHINA ; EASTERN CHINA ; SE CHINA ; CRETACEOUS MAGMATISM ; GEODYNAMIC SETTINGS ; JIAODONG PENINSULA ; SOUTHEASTERN CHINA |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000231658100007 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/65828]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wu, FY |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Lithosphere Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Curtin Univ Technol, Dept Appl Geol, Perth, WA 6845, Australia |
| 推荐引用方式 GB/T 7714 | Wu, FY,Yang, JH,Wilde, SA,et al. Geochronology, petrogenesis and tectonic implications of Jurassic granites in the Liaodong Peninsula, NE China[J]. CHEMICAL GEOLOGY,2005,221(1-2):127-156. |
| APA | Wu, FY,Yang, JH,Wilde, SA,&Zhang, XO.(2005).Geochronology, petrogenesis and tectonic implications of Jurassic granites in the Liaodong Peninsula, NE China.CHEMICAL GEOLOGY,221(1-2),127-156. |
| MLA | Wu, FY,et al."Geochronology, petrogenesis and tectonic implications of Jurassic granites in the Liaodong Peninsula, NE China".CHEMICAL GEOLOGY 221.1-2(2005):127-156. |
入库方式： OAI收割
来源：地质与地球物理研究所
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