Early cretaceous ridge subduction in the Shandong Peninsula, Eastern China, indicated by Laoshan A-type granite
文献类型：期刊论文
| 作者 | Li, Jie1,4 ; Li, He2,4; Li, Congying2,4; Song, Mingchun1,3; Jiang, Mengyao1; Yuan, Shuai2,4; Zhang, Lipeng2,4
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| 刊名 | FRONTIERS IN EARTH SCIENCE
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| 出版日期 | 2023-01-06 |
| 卷号 | 10页码:21 |
| 关键词 | ridge subduction apatite zircon U-Pb age Laoshan A-type granite Shandong peninsula |
| DOI | 10.3389/feart.2022.1000603 |
| 通讯作者 | Li, He(lihe@qdio.ac.cn) |
| 英文摘要 | Early Cretaceous A-type granites are widespread in the Shandong Peninsula, which can be used to elucidate the tectonic evolution of the eastern China and the destruction of the North China Craton. However, their genesis is still controversial. Several competing models, ranging from slab break-off, postorogenic extension, foundering of the lower crust and ridge subduction, were proposed. Here, we report zircon U-Pb ages, whole-rock and apatite geochemical compositions of the Laoshan granite and discuss its tectonic implications. The Laoshan granite has typical characteristics of A-type granite with high FeOT/(FeOT + MgO) ratios (0.90-0.97) and 10000*Ga/Al ratios (2.70-3.36) and high total alkali (Na2O + K2O: 7.95-8.70 wt%) contents and Zr+Nb+Ce+Y (most > 350 ppm) concentrations. The Laoshan granite is further classified as A(1)-type based on the Yb/Ta-Y/Nb and Ce/Nb-Y/Nb diagrams and the Nb-Y-3Ga and Nb-Y-Ce triangular discriminant diagrams. Zircon U-Pb dating of two Laoshan granite samples yielded emplacement ages of 117.8 +/- 1.0 Ma and 120.1 +/- 1.3 Ma, respectively. The oxygen fugacity of the Laoshan granite magma is low, as indicated by zircon Ce4+/Ce3+ ratios (most < 300). The crystallization temperature of zircon varies significantly, ranging from 652 to 830 C. The apatite compositions show that the Laoshan granite has high F (2.09-2.72 wt%) and low Cl (0.01-0.09 wt%) contents, consistent with influence by fluid released from the decomposition of phengite. Apatite rare earth elements show that mantle sources are also involved in Laoshan A-type granite. Combined previous studies of A-type granitic plutons in the Shandong Province and the Lower Yangtze River belt with the drifting history of the Pacific plate, we propose that the flat subduction of the spreading ridge between the Pacific and the Izanagi plates was responsible for the formation of Laoshan A-type granite. |
| WOS关键词 | ZIRCON U-PB ; YANGTZE-RIVER BELT ; NORTH CHINA ; JIAODONG PENINSULA ; GOLD MINERALIZATION ; TRACE-ELEMENTS ; GEOCHEMICAL CHARACTERISTICS ; ISOTOPIC CONSTRAINTS ; DABIE MOUNTAINS ; HF ISOTOPES |
| 资助项目 | National Natural Science Foundation of China[91958110] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020203] ; Hebei Natural Science Foundation[D2020403061] ; Key Projects of Science and Technology Research in Universities of Hebei Province[ZD2021018] ; National Natural Science Foundation of China Shandong Joint Fund Project[U2006201] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | FRONTIERS MEDIA SA |
| WOS记录号 | WOS:000918165800001 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/183358]  |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Li, He |
| 作者单位 | 1.Hebei GEO Univ, Hebei Key Lab Strateg Crit Mineral Resources, Shijiazhuang, Peoples R China 2.Laoshan Lab, Qingdao, Peoples R China 3.Shandong Prov No 6 Explorat Inst Geol & Mineral Re, Weihai, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jie,Li, He,Li, Congying,et al. Early cretaceous ridge subduction in the Shandong Peninsula, Eastern China, indicated by Laoshan A-type granite[J]. FRONTIERS IN EARTH SCIENCE,2023,10:21. |
| APA | Li, Jie.,Li, He.,Li, Congying.,Song, Mingchun.,Jiang, Mengyao.,...&Zhang, Lipeng.(2023).Early cretaceous ridge subduction in the Shandong Peninsula, Eastern China, indicated by Laoshan A-type granite.FRONTIERS IN EARTH SCIENCE,10,21. |
| MLA | Li, Jie,et al."Early cretaceous ridge subduction in the Shandong Peninsula, Eastern China, indicated by Laoshan A-type granite".FRONTIERS IN EARTH SCIENCE 10(2023):21. |
入库方式： OAI收割
来源：海洋研究所
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