2.1Ga crustal remelting event in Hengshan Complex: Evidence from zircon U-Pb dating and Hf-Nd isotopic study on potassic granites.

	2.1Ga crustal remelting event in Hengshan Complex: Evidence from zircon U-Pb dating and Hf-Nd isotopic study on potassic granites.
	Zhao RuiFu; Guo JingHui; Peng Peng; Liu Fu
刊名	ACTA PETROLOGICA SINICA
	2011-06-01
卷号	27 期号:6 页码:1607-1623
关键词	Potassic granite Crustal melting event Paleoproterozoic Hengshan Complex North China Craton
ISSN号	1000-0569
文献子类	Article
英文摘要	The Hengshan Complex in the Central Zone of the North China Craton, which is a typical high-grade terrain and experienced 1.85Ga high-pressure granulite facies metamorphism, composes of similar to 2.5Ga TTG gneisses and some paragneisses. A suite of potassic granites in this complex is investigated, which mainly consists of hornblende monzogranitie and biotite monzogranite. Zircon grains from a hornblende monzogranite sample yield a weighted average (207)Pb/(206)Pb age of 2052 +/- 17Ma by LA-ICP-MS and 2084 +/- 4Ma by SIMS. A biotite monzogranite sample gives a weighted average (207)Pb/(206)Pb age of 2060 +/- 18Ma by LA-ICP-MS and 2083 +/- 15Ma by SIMS. Ca. 2080Ma SIMS ages possibly indicate the crystallization time of these potassic granites. epsilon(Hf)(t) values of zircons in the granites range from -6.0 to 0.6 with t(DM) (depleted mantle model ages) of 2.48 similar to 2.60Ga, while epsilon(Nd)(t) values range from -3.3 to -1.7 with t(DM) of 2.43 similar to 2.68Ga. These indicate that the potassic granites were likely derived from ancient crust. Together with the geochemical characteristics of the surrounding TTG rocks, we suggest that the similar to 2.1Ga potassic granites could be originated from the partial melting of the 2.5Ga TTG gneisses. This study confirms a Paleoproterozoic (similar to 2.1Ga) crust remelting event in Hengshan Complex, which may occur in an extensional setting in the North China Craton.
WOS关键词	NORTH CHINA CRATON ; PALEOPROTEROZOIC EVOLUTION ; FUPING COMPLEX ; GEOCHRONOLOGICAL CONSTRAINTS ; ZHONGTIAO MOUNTAINS ; TECTONIC EVOLUTION ; BASEMENT ROCKS ; EASTERN BLOCK ; CENTRAL ZONE ; AGE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000292995600004
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/74546]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhao RuiFu
作者单位	Chinese Acad Sci, Stale Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhao RuiFu,Guo JingHui,Peng Peng,et al. 2.1Ga crustal remelting event in Hengshan Complex: Evidence from zircon U-Pb dating and Hf-Nd isotopic study on potassic granites.[J]. ACTA PETROLOGICA SINICA,2011,27(6):1607-1623.
APA	Zhao RuiFu,Guo JingHui,Peng Peng,&Liu Fu.(2011).2.1Ga crustal remelting event in Hengshan Complex: Evidence from zircon U-Pb dating and Hf-Nd isotopic study on potassic granites..ACTA PETROLOGICA SINICA,27(6),1607-1623.
MLA	Zhao RuiFu,et al."2.1Ga crustal remelting event in Hengshan Complex: Evidence from zircon U-Pb dating and Hf-Nd isotopic study on potassic granites.".ACTA PETROLOGICA SINICA 27.6(2011):1607-1623.