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Archean-Paleoproterozoic crustal evolution of the Ordos Block in the North China Craton: Constraints from zircon U-Pb geochronology and Hf isotopes for gneissic granitoids of the basement

文献类型：期刊论文

作者Zhang, Chengli1; Diwu, Chunrong1; Kroener, Alfred2,3; Sun, Yong1; Luo, Jinglan1; Li, Qiuli4; Gou, Longlong1; Lin, Hongbing5; Wei, Xinshan6; Zhao, Jiao1
刊名PRECAMBRIAN RESEARCH
出版日期2015-09-01
卷号267页码:121-136
关键词Zircon U-pb Dating In Situ Hf Isotope Granitoids Ordos Block North China Craton
DOI10.1016/j.precamres.2015.06.001
文献子类Article
英文摘要The Ordos Block has been considered as an Archean micro-block in North China Craton. However, its formation and evolution are poorly understood for a long time due to lack of available basement rocks. Our LA-ICPMS and SIMS zircon U-Pb dating of gneissic granitoids from the Ordos Block basement identified two distinct periods of granitic magmatism at similar to 2.5 Ma and 2.2-2.0 Ga, and two phases of metamorphisms at similar to 1.95 Ga and similar to 1.85 Ga, respectively. Of which most zircons of similar to 2.5 Ga granitoids show positive epsilon(Hf)(t) values ranging from +0.1 to +4.1 with a peak TEN of similar to 2.7 Ga. Minor zircons have negative epsilon(Hf)(t) values from -3.8 to -0.02 and T-Hf(C) of 2.8-3.1 Ga. Moreover, the 3.40 Ga inherited zircon and zircons with T-Hf(C) of 3.1-4.2 Ga were found from 2.2 Ga to 2.0 Ga granitoids. These suggest that there existed a Neoarchean crust in the Ordos Block, which underwent a major crustal growth at similar to 2.7 Ga and granitic magmatism at similar to 2.5 Ga, highly consisting with similar to 2.7 Ga crustal growth and similar to 2.5 Ga magmatism resulted from juvenile crustal reworking in North China Craton. The zircons from 2.2 Ga to 2.0 Ga granitoids in Ordos Block basement display variable Hf isotopic composition of positive to negative epsilon(Hf)(t) values, much similar to those of 22-2.0 Ga granitoids related to continental margin arc setting in the Trans-North China Orogen. They were subsequently subjected to similar to 1.95 and similar to 1.85 Ga metamorphisms, which were widespread throughout the Trans-North China Orogen. Based on the highly coherent zircon geochronology and Hf isotopic composition between Ordos Block and other micro-blocks of North China Craton, we propose that there is a Neoarchean crust in Ordos Block, which underwent a tectonic evolution similar to those in East Block in later Neoarchean, and then experienced 2.2-2.0 Ga granitic magmatism related to continental margin arc and 1.95-1.85 Ga metamorphism resulted from collision between the East and West Blocks along TNCO. (C) 2015 Elsevier B.V. All rights reserved.
WOS关键词EASTERN HEBEI PROVINCE ; LA-ICP-MS ; QINLING OROGENIC BELT ; LU-HF ; DETRITAL ZIRCONS ; KHONDALITE BELT ; TECTONIC IMPLICATIONS ; TRACE-ELEMENT ; WESTERN BLOCK ; TTG GNEISSES
WOS研究方向Geology
语种英语
WOS记录号WOS:000359874800007
资助机构National Key Basic Research Program of China(2012CB416606) ; National Key Basic Research Program of China(2012CB416606) ; MOST from the State Key Laboratory of Continental Dynamics, Northwest University(BJ11061) ; MOST from the State Key Laboratory of Continental Dynamics, Northwest University(BJ11061) ; National Key Basic Research Program of China(2012CB416606) ; National Key Basic Research Program of China(2012CB416606) ; MOST from the State Key Laboratory of Continental Dynamics, Northwest University(BJ11061) ; MOST from the State Key Laboratory of Continental Dynamics, Northwest University(BJ11061)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62276]  
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.NW Univ Xian, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China
2.Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Beijing, Peoples R China
3.Johannes Gutenberg Univ Mainz, Dept Geosci, Mainz, Germany
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
5.Changqing Oilfield Co, PetroChina, Explorat Dept, Xian, Peoples R China
6.Changqing Oilfield Co, PetroChina, Res Inst Explorat & Dev, Xian, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Chengli,Diwu, Chunrong,Kroener, Alfred,et al. Archean-Paleoproterozoic crustal evolution of the Ordos Block in the North China Craton: Constraints from zircon U-Pb geochronology and Hf isotopes for gneissic granitoids of the basement[J]. PRECAMBRIAN RESEARCH,2015,267:121-136.
APA Zhang, Chengli.,Diwu, Chunrong.,Kroener, Alfred.,Sun, Yong.,Luo, Jinglan.,...&Zhao, Jiao.(2015).Archean-Paleoproterozoic crustal evolution of the Ordos Block in the North China Craton: Constraints from zircon U-Pb geochronology and Hf isotopes for gneissic granitoids of the basement.PRECAMBRIAN RESEARCH,267,121-136.
MLA Zhang, Chengli,et al."Archean-Paleoproterozoic crustal evolution of the Ordos Block in the North China Craton: Constraints from zircon U-Pb geochronology and Hf isotopes for gneissic granitoids of the basement".PRECAMBRIAN RESEARCH 267(2015):121-136.

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来源：地质与地球物理研究所

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