The re-examination of the age and stratigraphic subdivision of the Hutuo Group in the Wutai Mountains area, North China Craton: Evidences from geology and zircon U-Pb geochronology

	The re-examination of the age and stratigraphic subdivision of the Hutuo Group in the Wutai Mountains area, North China Craton: Evidences from geology and zircon U-Pb geochronology
	Du LiLin 1; Yang ChongHui 1; Wang Wei 2; Ren LiuDong 1; Wan YuSheng 1,3; Song HuiXia 1; Geng YuanSheng 1; Hou KeJun 4
刊名	ACTA PETROLOGICA SINICA
	2011-04-01
卷号	27 期号:4 页码:1037-1055
关键词	Hutuo Group Meta-sandstone Zircon U-Pb age Middle Paleoproterozoic Guojiazhai Group
ISSN号	1000-0569
文献子类	Article
英文摘要	In order to constrain the age of the Hutuo Group, five meta-sandstone samples are collected from Sijizhuang Formation of Doucun Subgroup, Wenshan Formation of Dongye Subgroup, and Xiheli Formation of Guojiazhai Subgroup, respectively, in Hutuo Group, Wutai Mountains area, North China Craton. Zircons from these samples have been analyzed with the technique of La-MC-ICPMS. The results show that most of the (207)Pb/(206)Pb ages of 2 sandstones from Sijizhuang Formation mainly concentrate at two peaks, similar to 2. 5Ga and 2. 1 similar to 2. 2Ga, respectively. The provenances of the similar to 2. 5Ga detrital zircons are derived from the Neoarchean Wutai Group and contemporaneous granitoids in the Wutai Mountains area. 19 grains of the 2. 1 similar to 2. 2Ga detrital zircons have the weighted mean (207)Pb/(206)Pb age of 2134 +/- 5Ma. So the maximal deposition age of the Sijizhuang Formation is limited to 2134Ma or less. Combining the formation age of the volcanic rocks of 2140 +/- 10Ma and thick layer of conglomerates at the bottom of the Sijizhuang Formation, we deduce that the Hutuo Group deposited at similar to 2. 2Ga, middle Paleoproterozoic. The (207)Pb/(206)Pb ages of the detrital zircons from the bottom of the Wenshan Formation mainly distribute at 2050 similar to 2122Ma. Among these detrital zircons, 64 grains with younger ages produce the weighted mean age of 2068 +/- 3Ma, indicating the maximal deposition time of the Dongye Subgroup at ca. 2070Ma. Considering the volcanic rocks of 2087 +/- 9Ma in the Qingshicun Formation at the top of the Doucun Subgroup, we confer that the Dongye Subgroup deposited at ca. 2070Ma. The youngest zircon age from the metasandstone in Guojiazhai Subgroup gives the (207)Pb/(206)Pb age of 1958 +/- 10Ma, constraining the Guojiazhai Subgroup deposited at the late or end of Paleoproterozoic. The North China Craton was finally cratonized at the end of Paleoproterozoic. As the Guojiazhai Subgroup unconformably overlies the Dongye Subgroup, the two stratigraphic units have recorded distinct geological features and may deposit at different geological stages. Therefore, we suggest that the Guojiazhai Subgroup should be separated from the Hutuo Group and re-named as the Guojiazhai Group which initially deposited at the age of 1. 9 similar to 1. 8Ga, and the substantial sedimentation completed during to post-cratonization process of the North China Craton.
WOS关键词	LOWER CRUSTAL SECTION ; TECTONIC EVOLUTION ; DETRITAL ZIRCONS ; HF ISOTOPE ; LU-HF ; OROGEN ; CONSTRAINTS ; COMPLEX ; BELT ; PROVINCE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000290080200011
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/74464]
专题	中国科学院地质与地球物理研究所
通讯作者	Du LiLin
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Beijing SHRIMP Ctr, Beijing 100037, Peoples R China 4.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Du LiLin,Yang ChongHui,Wang Wei,et al. The re-examination of the age and stratigraphic subdivision of the Hutuo Group in the Wutai Mountains area, North China Craton: Evidences from geology and zircon U-Pb geochronology[J]. ACTA PETROLOGICA SINICA,2011,27(4):1037-1055.
APA	Du LiLin.,Yang ChongHui.,Wang Wei.,Ren LiuDong.,Wan YuSheng.,...&Hou KeJun.(2011).The re-examination of the age and stratigraphic subdivision of the Hutuo Group in the Wutai Mountains area, North China Craton: Evidences from geology and zircon U-Pb geochronology.ACTA PETROLOGICA SINICA,27(4),1037-1055.
MLA	Du LiLin,et al."The re-examination of the age and stratigraphic subdivision of the Hutuo Group in the Wutai Mountains area, North China Craton: Evidences from geology and zircon U-Pb geochronology".ACTA PETROLOGICA SINICA 27.4(2011):1037-1055.