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Zircon U-Pb ages and geochemistry of the Huai'an TTG gneisses terrane: Petrogenesis and implications for similar to 2.5 Ga crustal growth in the North China Craton

文献类型：期刊论文

作者Liu, Fu; Guo, Jing-Hui; Peng, Peng; Qian, Qing
刊名PRECAMBRIAN RESEARCH
出版日期2012-08-01
卷号212页码:225-244
关键词TTG gneisses Dioritic gneiss 2.5 Ga crustal growth Huai'an gneiss terrane Late Archean North China Craton
ISSN号0301-9268
DOI10.1016/j.precamres.2012.06.006
文献子类Article
英文摘要The Huai'an gneiss terrane is a typical Archean terrane within the Trans-North China Orogen of the North China Craton (NCC) and is composed of Tonalite-Trondhjemite-Granodiorite (TTG) suite and dioritic granulite facies gneisses. Precise SHRIMPII and Cameca IMS1280 zircon U-Pb ages demonstrate that the Huai'an gneisses formed around 2.55-2.50 Ga and underwent granulite facies metamorphism at 1.85-1.80 Ga. The TTG gneisses are compositionally equivalent to high-SiO2 adakites, with high SiO2 and Al2O3 concentrations, strongly fractionated rare earth element (REE) patterns ((La/Yb)(N) = 10-54) with positive or negligible Eu anomalies (Eu/Eu* = 0.9-3.4), low heavy REE (HREE) and Y concentrations, high Sr (435-938 ppm) concentrations, and high Sr/Y ratios (48-261). High Mg numbers (33-60) and high compatible element concentrations (e.g., Cr = 11-183 ppm and Ni = 11-82 ppm) indicate that the magmas that formed these gneisses were derived from interaction between adakitic melts and mantle material. The dioritic gneisses have compositions similar to high-Mg diorites or sanukitoids, with high Al2O3 (14.46-17.61 wt%), MgO (3.0-6.4 wt%), Cr (100-304 ppm), and Ni (57-109 ppm) concentrations, and fractionated REE patterns with weak negative or no Eu anomalies (Eu/Eu* = 0.8-1.0). All the TTG and dioritic gneiss samples analysed during this study have negative Nb, Ta, and Ti anomalies, compared to neighbouring elements in spider-diagrams, with the majority having high positive epsilon(Nd)(t)and epsilon(Hf)(t) values, close to values of the depleted mantle. These geochemical characteristics strongly suggest that protoliths of the Huai'an TTG and dioritic gneisses originated in a juvenile crust-forming event at 2.55-2.50 Ga through partial melting of subducted oceanic crustal material; these magmas also assimilated mantle peridotite material during their ascent. This indicates that similar to 2.5 Ga mantle-derived magmatism led to significant crustal growth in the North China Craton, and was probably associated with subduction. (C) 2012 Elsevier B.V. All rights reserved.
WOS关键词LIAO-JI BELT ; EARLY CONTINENTAL-CRUST ; UNDERPLATED BASALTIC CRUST ; WESTERN SUPERIOR PROVINCE ; HIGH-PRESSURE GRANULITES ; ND ISOTOPIC CONSTRAINTS ; SLAB-DERIVED MELTS ; SUBDUCTION ZONES ; TRACE-ELEMENTS ; EASTERN BLOCK
WOS研究方向Geology
语种英语
WOS记录号WOS:000307085500015
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; 40730315 ; 40730315 ; 40730315 ; 40730315 ; 40372089) ; 40372089) ; 40372089) ; 40372089) ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; 40730315 ; 40730315 ; 40730315 ; 40730315 ; 40372089) ; 40372089) ; 40372089) ; 40372089) ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; 40730315 ; 40730315 ; 40730315 ; 40730315 ; 40372089) ; 40372089) ; 40372089) ; 40372089) ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; National Natural Science Foundation of China(41023009 ; 40730315 ; 40730315 ; 40730315 ; 40730315 ; 40372089) ; 40372089) ; 40372089) ; 40372089)
源URL[http://ir.iggcas.ac.cn/handle/132A11/84638]  
专题中国科学院地质与地球物理研究所
通讯作者Liu, Fu
作者单位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		 Liu, Fu,Guo, Jing-Hui,Peng, Peng,et al. Zircon U-Pb ages and geochemistry of the Huai'an TTG gneisses terrane: Petrogenesis and implications for similar to 2.5 Ga crustal growth in the North China Craton[J]. PRECAMBRIAN RESEARCH,2012,212:225-244.
APA Liu, Fu,Guo, Jing-Hui,Peng, Peng,&Qian, Qing.(2012).Zircon U-Pb ages and geochemistry of the Huai'an TTG gneisses terrane: Petrogenesis and implications for similar to 2.5 Ga crustal growth in the North China Craton.PRECAMBRIAN RESEARCH,212,225-244.
MLA Liu, Fu,et al."Zircon U-Pb ages and geochemistry of the Huai'an TTG gneisses terrane: Petrogenesis and implications for similar to 2.5 Ga crustal growth in the North China Craton".PRECAMBRIAN RESEARCH 212(2012):225-244.

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来源：地质与地球物理研究所

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