Geochemistry and U-Pb geochronology of K-bentonites from the Pingliang Formation of the Upper Ordovician in Gansu, North China, and their tectonic implications

doi:10.1002/gj.3609

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Geochemistry and U-Pb geochronology of K-bentonites from the Pingliang Formation of the Upper Ordovician in Gansu, North China, and their tectonic implications
	Xu, Junjie 1,2,3; Wu, Huaichun 1,3; Chu, Zhuyin 2; Fang, Qiang 1,3; Zhang, Shihong 1; Yang, Tianshui 1; Li, Haiyan 1
刊名	GEOLOGICAL JOURNAL
	2019-07-30
页码	15
关键词	geochemistry K-bentonites SIMS U-Pb zircon dating south-west margin of Ordos Basin
ISSN号	0072-1050
DOI	10.1002/gj.3609
英文摘要	The Late Ordovician Pingliang Formation in the Guanzhuang section, located in the south-western Ordos Basin, North China, contains several K-bentonite layers, which are important for understanding the tectonic evolution of the south-western Ordos Basin. This study provides new geochemical and SIMS U-Pb geochronological data for the K-bentonites to establish the Ordovician high-resolution chronostratigraphic framework for the Ordos Basin and to provide temporal constraints of major volcanic-magmatic activity. K-bentonites in the succession yield U-Pb zircon ages of 457.6 +/- 3.8 Ma and 454.8 +/- 3.8 Ma (2 sigma analytical uncertainty), showing a depositional age in the Sandbian Stage (Late Ordovician). The result is consistent with the biostratigraphic and astrochronologic framework, achieving the intercalibration of different dating methods. The discrimination diagrams of whole-rock Na2O+K2O against SiO2 and Zr/TiO2 against Nb/Y and Th/Yb against Nb/Yb and Th-Hf-Ta indicate that the K-bentonites have obvious arc affinities. Based on the geological background, we conclude that the K-bentonites in the south-western Ordos Basin were mainly deposited during the development of the North Qilian-North Qinling volcanic arc in the Sandbian.
资助项目	National Natural Science Foundation of China[41790451] ; National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41673061] ; Fundamental Research Funds for the Central Universities[2652018071]
WOS关键词	ORDOS BASIN ; SOUTH CHINA ; ZIRCON GEOCHRONOLOGY ; SOUTHWESTERN ORDOS ; YANCHANG FORMATION ; NATURAL-GAS ; NW CHINA ; CONSTRAINTS ; EVOLUTION ; AGES
WOS研究方向	Geology
语种	英语
出版者	WILEY
WOS记录号	WOS:000479388300001
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/93339]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Wu, Huaichun
作者单位	1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 10083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 3.China Univ Geosci, Sch Ocean Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xu, Junjie,Wu, Huaichun,Chu, Zhuyin,et al. Geochemistry and U-Pb geochronology of K-bentonites from the Pingliang Formation of the Upper Ordovician in Gansu, North China, and their tectonic implications[J]. GEOLOGICAL JOURNAL,2019:15.
APA	Xu, Junjie.,Wu, Huaichun.,Chu, Zhuyin.,Fang, Qiang.,Zhang, Shihong.,...&Li, Haiyan.(2019).Geochemistry and U-Pb geochronology of K-bentonites from the Pingliang Formation of the Upper Ordovician in Gansu, North China, and their tectonic implications.GEOLOGICAL JOURNAL,15.
MLA	Xu, Junjie,et al."Geochemistry and U-Pb geochronology of K-bentonites from the Pingliang Formation of the Upper Ordovician in Gansu, North China, and their tectonic implications".GEOLOGICAL JOURNAL (2019):15.