Zircon U-Pb-Hf isotopes and whole-rock geochemistry of granitoid   gneisses in the Jianping gneissic terrane, Western Liaoning Province:   Constraints on the Neoarchean crustal evolution of the North China   Craton

doi:10.1016/j.precamres.2012.09.019

CORC > 北京大学 > 地球与空间科学学院

	Zircon U-Pb-Hf isotopes and whole-rock geochemistry of granitoid gneisses in the Jianping gneissic terrane, Western Liaoning Province: Constraints on the Neoarchean crustal evolution of the North China Craton
	Wang, Wei ; Liu, Shuwen ; Santosh, M. ; Bai, Xiang ; Li, Qiugen ; Yang, Pengtao ; Guo, Rongrong
刊名	precambrian research
	2013
关键词	Jianping gneissic terrane Western Liaoning Province Granitoid gneisses Neoarchean crustal evolution Andean-type active continental margin North China Craton TRONDHJEMITE-GRANODIORITE TTG ARCHEAN SANUKITOID SUITES LARGE IGNEOUS PROVINCE TECTONIC EVOLUTION DETRITAL ZIRCONS JI BELT EASTERN BLOCK METAMORPHIC EVOLUTION JINING COMPLEX TRACE-ELEMENT
DOI	10.1016/j.precamres.2012.09.019
英文摘要	The Jianping gneissic terrane (JPGT), Western Liaoning Province (WLP) at the northwestern margin of the Eastern Block of the North China Craton is one of the major Neoarchean high-grade metamorphic terranes. The region is composed dominantly of metamorphosed volcanic and pyroclastic rocks and granitoid gneisses. Geological and petrological features together with geochemical data suggest that the magmatic precursors of these granitoid gneisses are tonalite, trondhjemite, granodiorite (TM), diorite and monzo-granite. Whereas the TTGs show strong gneissic fabric, the monzogranitic rocks are only weakly gneissic and generally display massive structures. LA-ICPMS zircon U-Pb isotopic analyses reveal that the dioritic and TTG gneisses formed at 2506-2532 Ma, followed by the emplacement of the monzogranitic gneisses at similar to 2496 Ma. These granitoid gneisses can be classified into two groups: a low silica group (LSG) and a high silica group (HSG). Detailed petrogenetic studies suggest that the dioritic gneisses (LSG) were derived from the partial melting of an enriched mantle source metasomatized by slab fluids, whereas the tonalitic and granodioritic gneisses of the LSG were produced by the partial melting of subducted oceanic slabs and the melts were contaminated by mantle peridotites during their ascent. In comparison, the HSG granitoid gneisses were generated by the partial melting of the lower continental crust composed mainly of metamorphosed basaltic (garnet amphibolites) and pelitic rocks. Comprehensive zircon U-Pb dating and Lu-Hf isotopic data indicate that the JPGT and the North Chaoyang-Fuxin-Yixian granite-greenstone belt (NCFY-GGB) experienced nearly the same crustal evolution during Neoarchean to early Paleoproterozoic time and major crustal growth at similar to 2.5 and similar to 2.7 Ga was recorded in the WLP. Collectively, the WLP preserves a complex geodynamic history from the mid-ocean ridge, through intra-oceanic arc to Andean-type active continental margin. (c) 2012 Elsevier B.V. All rights reserved.; Geosciences, Multidisciplinary; SCI(E); 23; ARTICLE; 184-221; 224
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/155670]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, Wei,Liu, Shuwen,Santosh, M.,et al. Zircon U-Pb-Hf isotopes and whole-rock geochemistry of granitoid gneisses in the Jianping gneissic terrane, Western Liaoning Province: Constraints on the Neoarchean crustal evolution of the North China Craton[J]. precambrian research,2013.
APA	Wang, Wei.,Liu, Shuwen.,Santosh, M..,Bai, Xiang.,Li, Qiugen.,...&Guo, Rongrong.(2013).Zircon U-Pb-Hf isotopes and whole-rock geochemistry of granitoid gneisses in the Jianping gneissic terrane, Western Liaoning Province: Constraints on the Neoarchean crustal evolution of the North China Craton.precambrian research.
MLA	Wang, Wei,et al."Zircon U-Pb-Hf isotopes and whole-rock geochemistry of granitoid gneisses in the Jianping gneissic terrane, Western Liaoning Province: Constraints on the Neoarchean crustal evolution of the North China Craton".precambrian research (2013).