Tectonic significance of the Cretaceous granitoids along the south-east coast of continental China
文献类型：期刊论文
| 作者 | Xue, Qiqi4,5; Niu, Yaoling2,3,4,5; Chen, Shuo1,3,4; Sun, Pu3,4 ; Duan, Meng4,5; Gao, Yajie1,3,4; Hong, Di1,3,4; Xiao, Yuanyuan3,4; Wang, Xiaohong3,4; Guo, Pengyuan3,4
|
| 刊名 | GEOLOGICAL JOURNAL
 |
| 出版日期 | 2020 |
| 卷号 | 55期号:1页码:173-196 |
| 关键词 | Cretaceous granitoids crustal thickness variation crust-mantle interaction paleo-Pacific Plate subduction south-east continental China |
| ISSN号 | 0072-1050 |
| DOI | 10.1002/gj.3388 |
| 通讯作者 | Xue, Qiqi(xueq0451@foxmail.com) ; Niu, Yaoling(yaoling.niu@durham.ac.uk) |
| 英文摘要 | We present the results of our study on 16 Cretaceous granitoid plutons along the south-east coast of continental China. The zircon U-Pb ages and the bulk-rock Rb-Sr isochron age (R-2 = 0.935) indicate that the granitoids represent the last episode of magmatism (119-92 Ma) associated with the paleo-Pacific Plate subduction beneath continental China. These granitoids show large compositional variation that is to a first-order consistent with varying extents of magma evolution, which is best expressed by a large SiO2/MgO range and correlated trends of SiO2/MgO with the abundances and ratios of major and trace elements. The correlated Nd (epsilon Nd-(t) = -6.1 to -1.2) and Hf (epsilon Hf-(t) = -4.7 to +3.4) isotopic variation reflects parental magma compositional differences as a result of varying sources and processes. The Nd-Hf isotope data indicate that these granitoids were produced by mature continental crust melting with significant mantle input (similar to 20-60%). Rhyolite-MELTS modelling shows that relative to the less evolved (i.e., low SiO2/MgO) granitoid plutons, the progressively more evolved (i.e., varying larger SiO2/MgO) plutons can be explained by varying extents (similar to 24% to 67%) of fractional crystallization. The origin of the magmas parental to the granitoids is best explained by a two-stage process: (a) subducting slab dehydration-induced mantle wedge melting for basaltic magmas and (b) ascent and underplating/intrusion of the basaltic magmas caused the mature crustal melting for the granitoid magmas. The systematic northward decrease in epsilon Nd-(t) and epsilon Hf-(t) suggests progressively more enriched crustal material towards the north, but it may very well indicate northward crustal thickening, permitting a greater extent of crustal assimilation. |
| 资助项目 | National Natural Science Foundation of China[41130314] ; National Natural Science Foundation of China[41776067] ; National Natural Science Foundation of China[NSFC41630968] ; Scientific and Technological Innovation Project - Qingdao National Laboratory for Marine Science and Technology[2015ASKJ03] ; 111 Project[B18048] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1606401] ; Qingdao National Laboratory for Marine Science and Technology[2015ASKJ03] ; Chinese Academy of Sciences[Y42217101L] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000508025400011 |
| 出版者 | WILEY |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/164388]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Xue, Qiqi; Niu, Yaoling |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England 3.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China 5.China Univ Geosci, Sch Earth Sci & Mineral Resources, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xue, Qiqi,Niu, Yaoling,Chen, Shuo,et al. Tectonic significance of the Cretaceous granitoids along the south-east coast of continental China[J]. GEOLOGICAL JOURNAL,2020,55(1):173-196. |
| APA | Xue, Qiqi.,Niu, Yaoling.,Chen, Shuo.,Sun, Pu.,Duan, Meng.,...&Guo, Pengyuan.(2020).Tectonic significance of the Cretaceous granitoids along the south-east coast of continental China.GEOLOGICAL JOURNAL,55(1),173-196. |
| MLA | Xue, Qiqi,et al."Tectonic significance of the Cretaceous granitoids along the south-east coast of continental China".GEOLOGICAL JOURNAL 55.1(2020):173-196. |
入库方式： OAI收割
来源：海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。