SHRIMP dating and Hf isotope analysis of zircons from the Early;Precambrian basement in the Xi Ulanbulang area, Wuchuan, Inner Mongolia

	SHRIMP dating and Hf isotope analysis of zircons from the Early;Precambrian basement in the Xi Ulanbulang area, Wuchuan, Inner Mongolia
	Ma MingZhu 1; Xu ZhongYuan 2; Zhang LianChang 3; Dong ChunYan ; Dong XiaoJie 2; Liu ShouJie ; Liu DunYi ; Wan YuSheng 1
刊名	ACTA PETROLOGICA SINICA
	2013
卷号	29 期号:2 页码:501-516
关键词	Archean basement TTG Granulite SHRIMP zircon dating Hf isotope North China Craton
ISSN号	1000-0569
英文摘要	This paper reports SHRIMP U-Pb ages and Hf isotopes of zircons from Archean basement in the Xi Ulanbulang area, Wuchuan, western North China Craton (NCC). Zircons from a trondhjemite gneiss sample show core-rim textures, with magmatic cores and metamorphic rims having weighted mean Pb-207/Pb-206 ages of 2692 +/- 17Ma and 2528 +/- 16Ma, respectively. Hf isotope analyses have been carried out on zircons from 9 samples. Magmatic zircons of Early Neoarchean (2692 similar to 2697 Ma) trondhjemite gneisses (2 samples) have epsilon(Hf) (t), t(DM1) (Hf) and t(DM2) (Hf) being 4.78 similar to 8.83, 2646 similar to 2780Ma and 2632 similar to 2845Ma, respectively. Captured zircons of Neoarchean two-pyroxene granulite (2 samples) have epsilon(Hf) (t), t(DM1) (Hf) and tp,,,(Hf) of -2.30 similar to 8.62, 2543 similar to 2954Ma and 2529 3189Ma. Neoarchean meta-intrusive rocks (4 samples) have magmatic zircons with epsilon(Hf)(t) values of -2.60 8.09, t(DM1) (Hf) ages of 2529 2880Ma and t(DM2) (Hf) ages of 2538 3089Ma. Analyses on detrital zircons from a Paleoproterozoic kyanite-garnet felsic gneiss yielded epsilon(Hf)(t) values ranging from 1.52 to 6.59 and t(DM1) (Hf) and t(DM2) (Hf) model ages of 2432 2774Ma and 2498 2925Ma. Combined with early studies, we draw conclusions as follows: 1) in the study area, there are Early Neoarchean TTG rocks which underwent strong metamorphism at the end of Neoarchean together with Late Neoarchean rocks; 2) Early Neoarchean is an important period when continental crust was formed, however, in Late Neoarchean, reworking of older continental materials played an important role; 3) Guyang-Wuchuan, a typical area of the Archean Yinshan block, is similar to the Archean basement of the eastern NCC in many aspects, supporting an idea that the NCC had already been a single unit at the end of the Neoarchean.
学科主题	前寒武纪地质
WOS关键词	NORTH CHINA CRATON ; TECTONIC EVOLUTION ; METAMORPHIC ROCKS ; MANTLE ; GEOCHRONOLOGY ; GEOCHEMISTRY
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000317531300011
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40184]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China. 2.Chinese Acad Geol Sci, Inst Geol, State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China. 3.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China. 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China.
推荐引用方式 GB/T 7714	Ma MingZhu,Xu ZhongYuan,Zhang LianChang,et al. SHRIMP dating and Hf isotope analysis of zircons from the Early;Precambrian basement in the Xi Ulanbulang area, Wuchuan, Inner Mongolia[J]. ACTA PETROLOGICA SINICA,2013,29(2):501-516.
APA	Ma MingZhu.,Xu ZhongYuan.,Zhang LianChang.,Dong ChunYan.,Dong XiaoJie.,...&Wan YuSheng.(2013).SHRIMP dating and Hf isotope analysis of zircons from the Early;Precambrian basement in the Xi Ulanbulang area, Wuchuan, Inner Mongolia.ACTA PETROLOGICA SINICA,29(2),501-516.
MLA	Ma MingZhu,et al."SHRIMP dating and Hf isotope analysis of zircons from the Early;Precambrian basement in the Xi Ulanbulang area, Wuchuan, Inner Mongolia".ACTA PETROLOGICA SINICA 29.2(2013):501-516.