Revisiting Triassic stratigraphy of the Yanshan belt

doi:10.1007/s11430-014-5042-x

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

	Revisiting Triassic stratigraphy of the Yanshan belt
	Wei HongHong 1; Wu GuoLi 2; Duan Liang 2
刊名	SCIENCE CHINA-EARTH SCIENCES
	2015-04-01
卷号	58 期号:4 页码:491-501
关键词	Yanshan Belt Triassic Detrital Zircon La-mc-icpms Dating Sedimentation
DOI	10.1007/s11430-014-5042-x
文献子类	Article
英文摘要	Age determinations of the Triassic lithostratigraphic units of the Yanshan belt were previously based on plant fossils and regional correlations of lithologies. The Liujiagou and Heshanggou Formations were assigned as the Lower Triassic, and the Ermaying Formation was regarded as the Middle Triassic. We carried out a geochronologic study of detrital zircon grains from the Triassic sandstone in the Xiabancheng and Yingzi basins in northern Hebei where the Triassic strata are exceptionally well preserved. The results show that the Liujiagou, Heshanggou, and Ermaying Formations are all Late Triassic in age. The ages of detrital zircons also revealed that the upper part of the Shihezi Formation and the overlying Sunjiagou Formation, both of which were thought to be the Middle-Late Permian units, are actually late Early to Middle Triassic deposits. This study combines the upper Shihezi and Sunjiagou Formations into a single unit termed as the Yingzi Formation. We also substitute the widely-used Liujiagou, Heshanggou, and Ermaying Formations with the Dingjiagou, Xiabancheng, and Huzhangzi Formations, respectively. Field observations and facies analysis show that the top of the Shihezi Formation is an erosive surface, marking a parallel unconformity between the Middle Permian and Lower Triassic. The Yingzi Formation is composed mainly of meandering river deposits, indicative of tectonic quiescence and low-relief landform in the Early to Middle Triassic. In contrast, the Dingjiagou, Xiabancheng, and Huzhangzi Formations are interpreted as the deposits of sandy/gravelly braided rivers, alluvial fans, fan deltas, and deep lakes in association with volcanism, thus indicating an intense rifting setting. A new Triassic lithostratigraphic division is proposed according to age constraints and facies analysis, and the results are of significance for understanding the early Mesozoic tectonic evolution of the Yanshan belt.
WOS关键词	NORTH CHINA CRATON ; THRUST BELT ; XIABANCHENG BASIN ; HEBEI PROVINCE ; HF ISOTOPES ; U-PB ; MARGIN ; SEDIMENTATION ; BLOCK ; TECTONICS
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000351861700001
资助机构	National Natural Science Foundation of China(91114204 ; National Natural Science Foundation of China(91114204 ; 40972151) ; 40972151) ; National Natural Science Foundation of China(91114204 ; National Natural Science Foundation of China(91114204 ; 40972151) ; 40972151)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62575]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wei HongHong,Wu GuoLi,Duan Liang. Revisiting Triassic stratigraphy of the Yanshan belt[J]. SCIENCE CHINA-EARTH SCIENCES,2015,58(4):491-501.
APA	Wei HongHong,Wu GuoLi,&Duan Liang.(2015).Revisiting Triassic stratigraphy of the Yanshan belt.SCIENCE CHINA-EARTH SCIENCES,58(4),491-501.
MLA	Wei HongHong,et al."Revisiting Triassic stratigraphy of the Yanshan belt".SCIENCE CHINA-EARTH SCIENCES 58.4(2015):491-501.