Early cretaceous ridge subduction in the Shandong Peninsula, Eastern China, indicated by Laoshan A-type granite

doi:10.3389/feart.2022.1000603

IOCAS-IR

	Early cretaceous ridge subduction in the Shandong Peninsula, Eastern China, indicated by Laoshan A-type granite
	Li, Jie1,2 ; Li, He 2,3; Li, Congying 2,3; Song, Mingchun 1,4; Jiang, Mengyao 1; Yuan, Shuai2,3 ; Zhang, Lipeng 2,3
	2023-01-06
发表期刊	FRONTIERS IN EARTH SCIENCE
卷号	10 页码:21
通讯作者	Li, He(lihe@qdio.ac.cn)
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.
关键词	ridge subduction apatite zircon U-Pb age Laoshan A-type granite Shandong peninsula
DOI	10.3389/feart.2022.1000603
收录类别	SCI
语种	英语
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
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000918165800001
出版者	FRONTIERS MEDIA SA
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
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/183359
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.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 3.Laoshan Lab, Qingdao, Peoples R China 4.Shandong Prov No 6 Explorat Inst Geol & Mineral Re, Weihai, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
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.