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Ziron U-Pb ages and geochemistry of the Qinglong volcano-sedimentary rock series in Eastern Hebei: Implication for similar to 2500 Ma intra-continental rifting in the North China Craton

文献类型：期刊论文

作者Lv, Bin; Zhai, Mingguo; Li, Tiesheng; Peng, Peng
刊名PRECAMBRIAN RESEARCH
出版日期2012-07-01
卷号208页码:145-160
关键词North China Craton Qinglong volcano-sedimentary rock series Neoarchean Intra-continental rift Cratonization
ISSN号0301-9268
DOI10.1016/j.precamres.2012.04.002
文献子类Article
英文摘要Voluminous Archean rocks (including orthogneisses and supracrustal rocks) are exposed in Eastern Hebei, northern part of the North China Craton (NCC), and nearly all of these Archean rocks have experienced high-grade metamorphism of granulite-facies or upper amphibolite facies from 2.54 Ga to 2.52 Ga. The Qinglong area of the eastern part of Hebei Province has a set of low-grade (greenschist- to lower amphibolite-facies) supracrustal rocks, e.g., the Qinglong volcano-sedimentary rock series (QVRS), unconformably overlying on the high-grade metamorphosed Qianxi Complex. Zircons yield a weighted mean Pb-207/Pb-206 age of 2511 +/- 12 Ma meta-felsic volcanic rocks and 2503 +/- 13 Ma meta-basic volcanic rocks. These ages indicate that the QVRS formed during the period from 2511 Ma to 2503 Ma. The meta-felsic volcanic rocks display low MgO (0.96-2.67 wt.%), Cr (50.90-87.10 ppm), and Ni (2.78-6.18 ppm) contents, and low Nb/Ta ratios (13.56-14.54), and high light rare earth elements (LREEs) ((La/Yb)(n) = 14.75-22.04), which are interpreted to have been produced by the partial melting of the lower crust. The meta-basic volcanic rocks (low-grade amphibolites) have abundance levels from 3.86 wt.% to 7.74 wt.% of MgO, and from 46.11 wt.% to 51.99 wt.% of SiO2. They are enriched in LREEs and depleted in high field strength elements (HFSEs) with positive epsilon(Nd)(t) values (+2.6 to +2.9). The volcanic rocks in the QVRS show bimodal compositions. The epsilon(Hf)(t) (t=2511 Ma) values of amphibolite range from -4.7 to +5.7, and their single-stage Hf model ages vary from 2622 Ma to 3030 Ma (peak at 2835 Ma). For the meta-felsic volcanic rocks, the epsilon(Hf)(t) values range from -3.2 to +5 with two-stage model ages changing from 2683 Ma to 3180 Ma (peak at 2872 Ma). The QVRS is proposed to have formed during an intra-continent rift at 2500 Ma, after the regional high-grade metamorphism from 2.52 Ga to 2.54 Ga. The QVRS probably formed during an intra-continental rift, as a part of the late Neoarchean cover of the NCC. (C) 2012 Elsevier B.V. All rights reserved.
WOS关键词HF ISOTOPE COMPOSITION ; TECTONIC EVOLUTION ; LU-HF ; CRUSTAL EVOLUTION ; TRACE-ELEMENT ; CONTINENTAL EVOLUTION ; BASEMENT ROCKS ; ANSHAN AREA ; ZIRCON ; ND
WOS研究方向Geology
语种英语
WOS记录号WOS:000305380300008
出版者ELSEVIER SCIENCE BV
资助机构National Key Basic Research Special Foundation of China (973)(2012CB416600-6) ; National Key Basic Research Special Foundation of China (973)(2012CB416600-6) ; Key Research Project of National Science Foundation of China(41030316 ; Key Research Project of National Science Foundation of China(41030316 ; 40872124) ; 40872124) ; National Key Basic Research Special Foundation of China (973)(2012CB416600-6) ; National Key Basic Research Special Foundation of China (973)(2012CB416600-6) ; Key Research Project of National Science Foundation of China(41030316 ; Key Research Project of National Science Foundation of China(41030316 ; 40872124) ; 40872124) ; National Key Basic Research Special Foundation of China (973)(2012CB416600-6) ; National Key Basic Research Special Foundation of China (973)(2012CB416600-6) ; Key Research Project of National Science Foundation of China(41030316 ; Key Research Project of National Science Foundation of China(41030316 ; 40872124) ; 40872124) ; National Key Basic Research Special Foundation of China (973)(2012CB416600-6) ; National Key Basic Research Special Foundation of China (973)(2012CB416600-6) ; Key Research Project of National Science Foundation of China(41030316 ; Key Research Project of National Science Foundation of China(41030316 ; 40872124) ; 40872124)
源URL[http://ir.iggcas.ac.cn/handle/132A11/84320]  
专题中国科学院地质与地球物理研究所
通讯作者Zhai, Mingguo
作者单位Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resource, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Lv, Bin,Zhai, Mingguo,Li, Tiesheng,et al. Ziron U-Pb ages and geochemistry of the Qinglong volcano-sedimentary rock series in Eastern Hebei: Implication for similar to 2500 Ma intra-continental rifting in the North China Craton[J]. PRECAMBRIAN RESEARCH,2012,208:145-160.
APA Lv, Bin,Zhai, Mingguo,Li, Tiesheng,&Peng, Peng.(2012).Ziron U-Pb ages and geochemistry of the Qinglong volcano-sedimentary rock series in Eastern Hebei: Implication for similar to 2500 Ma intra-continental rifting in the North China Craton.PRECAMBRIAN RESEARCH,208,145-160.
MLA Lv, Bin,et al."Ziron U-Pb ages and geochemistry of the Qinglong volcano-sedimentary rock series in Eastern Hebei: Implication for similar to 2500 Ma intra-continental rifting in the North China Craton".PRECAMBRIAN RESEARCH 208(2012):145-160.

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来源：地质与地球物理研究所

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