U-Pb and Hf isotopic study of zircons of the Helanshan Complex: Constrains on the evolution of the Khondalite Belt in the Western Block of the North China Craton

doi:10.1016/j.lithos.2010.11.010

	U-Pb and Hf isotopic study of zircons of the Helanshan Complex: Constrains on the evolution of the Khondalite Belt in the Western Block of the North China Craton
	Yin, Changqing 1; Zhao, Guochun 1; Guo, Jinhui 2; Sun, Min 1; Xia, Xiaoping 1; Zhou, Xiwen 3; Liu, Chaohui 1
刊名	LITHOS
	2011-02-01
卷号	122 期号:1-2 页码:25-38
关键词	U-pb Age Hf Isotope Crustal Evolution Palaeoproterozoic Khondalite Belt North China Craton
ISSN号	0024-4937
DOI	10.1016/j.lithos.2010.11.010
文献子类	Article
英文摘要	The Helanshan Complex is located at the westernmost segment of the Khondalite Belt, a continent-continent collisional belt along which the Yinshan Block in the north collided with the Ordos Block in the south to form the Western Block of the North China Craton. The complex consists of S-type granites and high-grade pelitic granulite/gneiss, felsic paragneiss, quartzite, calc-silicate rock and marble, together called the Khondalite Series rocks. LA-Q-ICP-MS U-Pb geochronology and LA-MC-ICP-MS Lu-Hf isotopic data of zircons, combined with cathodoluminescence (CL) imaging, enable the resolution of magmatic and metamorphic events that can be directed towards understanding the formation and evolution of the Khondalite Belt in the Western Block of the North China Craton. CL images reveal the coexistence of magmatic-type detrital zircons and metamorphic zircons in most of the Khondalite Series rocks, of which the metamorphic zircons occur as either single grains or overgrowth rims surrounding and truncating magmatic-type detrital zircon cores. LA-Q-ICP-MS U-Pb analyses on magmatic-type detrital zircons reveal two distinct age populations, with one in the Archaean (2.85-2.53 Ga) and the other in the Palaeoproterozoic (2.2-2.0 Ga), suggesting that the sedimentary protoliths of the Khondalite Series rocks in the Helanshan Complex must have been deposited at some time after 2.0 Ga. The Hf analyses show that the Archaean detrital zircons possess negative epsilon(Hf)(t) values from -7.64 to -0.15 with depleted mantle model ages ranging from 3.34 to 3.10 Ga. This implies the existence of a Paleo-Mesoarchaean (3.34-3.10 Ga) crust in the Western Block, which underwent a recycling event in the period 2.85-2.53 Ga. Nearly all Palaeoproterozoic (2.2-2.0 Ga) detrital zircons possess positive epsilon(Hf)(t) values (0.86-9.38) with depleted mantle model ages of 2.45-2.15 Ga, suggesting a significant crustal growth event in the Western Block in the Palaeoproterozoic. Metamorphic zircons yield two groups of age, with one at similar to 1.95 Ga and the other at similar to 1.87 Ga, of which the former is considered as the timing of the collision between the Yinshan and Ordos Blocks to form the Western Block, whereas the latter is consistent with the age of similar to 1.86 Ga from two S-type granites which are considered to have formed by the partial melting of pelitic granulites/gneisses at the stage of the exhumation of the Helanshan Complex. (c) 2010 Elsevier B.V. All rights reserved.
WOS关键词	HIGH-PRESSURE GRANULITES ; ULTRAHIGH-TEMPERATURE METAMORPHISM ; BASEMENT ROCKS ; CENTRAL ZONE ; COLUMBIA SUPERCONTINENT ; REGIONAL METAMORPHISM ; TECTONIC IMPLICATIONS ; CRUSTAL EVOLUTION ; HENGSHAN COMPLEX ; DETRITAL ZIRCONS
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000287347100003
资助机构	Chinese National 973 Program(2007CB411307) ; Chinese National 973 Program(2007CB411307) ; Chinese NSFC(40730315 ; Chinese NSFC(40730315 ; Hong Kong RGC(7066/07P ; Hong Kong RGC(7066/07P ; 40872123 ; 40872123 ; 7053/08P) ; 7053/08P) ; 40872122) ; 40872122) ; Chinese National 973 Program(2007CB411307) ; Chinese National 973 Program(2007CB411307) ; Chinese NSFC(40730315 ; Chinese NSFC(40730315 ; Hong Kong RGC(7066/07P ; Hong Kong RGC(7066/07P ; 40872123 ; 40872123 ; 7053/08P) ; 7053/08P) ; 40872122) ; 40872122) ; Chinese National 973 Program(2007CB411307) ; Chinese National 973 Program(2007CB411307) ; Chinese NSFC(40730315 ; Chinese NSFC(40730315 ; Hong Kong RGC(7066/07P ; Hong Kong RGC(7066/07P ; 40872123 ; 40872123 ; 7053/08P) ; 7053/08P) ; 40872122) ; 40872122) ; Chinese National 973 Program(2007CB411307) ; Chinese National 973 Program(2007CB411307) ; Chinese NSFC(40730315 ; Chinese NSFC(40730315 ; Hong Kong RGC(7066/07P ; Hong Kong RGC(7066/07P ; 40872123 ; 40872123 ; 7053/08P) ; 7053/08P) ; 40872122) ; 40872122)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73988]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhao, Guochun
作者单位	1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 2.CAS, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.CAGS, Inst Geol, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Yin, Changqing,Zhao, Guochun,Guo, Jinhui,et al. U-Pb and Hf isotopic study of zircons of the Helanshan Complex: Constrains on the evolution of the Khondalite Belt in the Western Block of the North China Craton[J]. LITHOS,2011,122(1-2):25-38.
APA	Yin, Changqing.,Zhao, Guochun.,Guo, Jinhui.,Sun, Min.,Xia, Xiaoping.,...&Liu, Chaohui.(2011).U-Pb and Hf isotopic study of zircons of the Helanshan Complex: Constrains on the evolution of the Khondalite Belt in the Western Block of the North China Craton.LITHOS,122(1-2),25-38.
MLA	Yin, Changqing,et al."U-Pb and Hf isotopic study of zircons of the Helanshan Complex: Constrains on the evolution of the Khondalite Belt in the Western Block of the North China Craton".LITHOS 122.1-2(2011):25-38.