Source characteristics of the similar to 2.5 Ga Wangjiazhuang Banded Iron Formation from the Wutai greenstone belt in the North China Craton: Evidence from neodymium isotopes

doi:10.1016/j.jseaes.2014.07.038

	Source characteristics of the similar to 2.5 Ga Wangjiazhuang Banded Iron Formation from the Wutai greenstone belt in the North China Craton: Evidence from neodymium isotopes
	Wang, Changle 1,2; Zhang, Lianchang 1; Dai, Yanpei 1,2; Li, Wenjun 1
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2014-10-15
卷号	93 页码:288-300
关键词	Wutai greenstone belt (WGB) Neoarchean Wangjiazhuang BIF Neodymium isotopes North China Craton (NCC)
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2014.07.038
文献子类	Article
英文摘要	Here we first present samarium (Sm)-neodymium (Nd) isotopic data for the similar to 2.5 Ga Wangjiazhuang BIF and associated lithologies from the Wutai greenstone belt (WGB) in the North China Craton. Previous geochemical data of the BIF indicate that there are three decoupled end members controlling REE compositions: high-T hydrothermal fluids, ambient seawater and terrigenous contaminants. Clastic meta-sediment samples were collected for major and trace elements studies in an attempt to well constrain the nature of detrital components of the BIF. Fractionated light rare earth elements patterns and mild negative Eu anomalies in the majority of these meta-sedimentary samples point toward felsic source rocks. Moreover, the relatively low Th/Sc ratios and positive epsilon(Nd)(t) values are similar to those of the similar to 2.5 Ga granitoids, TTG gneisses and felsic volcanics in the WGB, further indicating that they are derived from less differentiated terranes. Low Chemical Index of Weathering (CIW) values and features in the A-CN-K diagrams for these meta-sediments imply a low degree of source weathering. Sm-Nd isotopes of the chemically pure BIF samples are characterized by negative epsilon(Nd)(t) values, whereas Al-rich BIF samples possess consistently positive epsilon(Nd)(t) features. Significantly, the associated supracrustal rocks in the study area have positive epsilon(Nd)(t) values. Taken together, these isotopic data also point to three REE sources controlling the back-arc basin depositional environment of the BIF, the first being seafloor-vented hydrothermal fluids (epsilon(Nd)(t) < -2.5) derived from interaction with the underlying old continental crust, the second being ambient seawater which reached its composition by erosion of parts of the depleted landmass (likely the arc) (epsilon(Nd)(t) > 0), the third being syndepositional detritus that received their features by weathering of a nearby depleted source (likely the arc) (epsilon(Nd)(t)> 0). (C) 2014 Elsevier Ltd. All rights reserved.
WOS关键词	RARE-EARTH-ELEMENT ; SOUTH-AFRICA ; HYDROTHERMAL FLUIDS ; TECTONIC EVOLUTION ; CRUSTAL EVOLUTION ; WESTERN-AUSTRALIA ; FUPING COMPLEX ; GEOCHEMICAL CONSTRAINTS ; LITHOTECTONIC ELEMENTS ; METASEDIMENTARY ROCKS
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000342549100020
资助机构	Major State Basic Research Programme of the People's Republic of China(2012CB416601) ; Major State Basic Research Programme of the People's Republic of China(2012CB416601) ; National Natural Science Foundation of China(41372100) ; National Natural Science Foundation of China(41372100) ; Major State Basic Research Programme of the People's Republic of China(2012CB416601) ; Major State Basic Research Programme of the People's Republic of China(2012CB416601) ; National Natural Science Foundation of China(41372100) ; National Natural Science Foundation of China(41372100) ; Major State Basic Research Programme of the People's Republic of China(2012CB416601) ; Major State Basic Research Programme of the People's Republic of China(2012CB416601) ; National Natural Science Foundation of China(41372100) ; National Natural Science Foundation of China(41372100) ; Major State Basic Research Programme of the People's Republic of China(2012CB416601) ; Major State Basic Research Programme of the People's Republic of China(2012CB416601) ; National Natural Science Foundation of China(41372100) ; National Natural Science Foundation of China(41372100)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84848]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang, Lianchang
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Changle,Zhang, Lianchang,Dai, Yanpei,et al. Source characteristics of the similar to 2.5 Ga Wangjiazhuang Banded Iron Formation from the Wutai greenstone belt in the North China Craton: Evidence from neodymium isotopes[J]. JOURNAL OF ASIAN EARTH SCIENCES,2014,93:288-300.
APA	Wang, Changle,Zhang, Lianchang,Dai, Yanpei,&Li, Wenjun.(2014).Source characteristics of the similar to 2.5 Ga Wangjiazhuang Banded Iron Formation from the Wutai greenstone belt in the North China Craton: Evidence from neodymium isotopes.JOURNAL OF ASIAN EARTH SCIENCES,93,288-300.
MLA	Wang, Changle,et al."Source characteristics of the similar to 2.5 Ga Wangjiazhuang Banded Iron Formation from the Wutai greenstone belt in the North China Craton: Evidence from neodymium isotopes".JOURNAL OF ASIAN EARTH SCIENCES 93(2014):288-300.