Age and origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China: U-Pb zircon age and whole-rock geochemical and Sr-Nd isotopic constraints

	Age and origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China: U-Pb zircon age and whole-rock geochemical and Sr-Nd isotopic constraints
	Shen Liu; Ruizhong Hu; Shan Gao; Caixia Feng; Ian M. Coulson; Guangying Feng; Yuhong Yang; Youqiang Qi; Chaogui Yang; Liang Tang
	2012
发表期刊	International Geology Review
卷号	54 期号:11 页码:1296-1308
摘要	Geochronological, geochemical, and whole-rock Sr-Nd isotopic analyses were performed on a suite of Palaeozoic nepheline syenites from Zijinshan to characterize their ages and petrogenesis. Laser ablation inductively coupled plasma-mass spectrometry U-Pb zircon analyses yield consistent ages of 525.7 +/- 2.8 million years for a sample (HYK01). These intrusive rocks belong to the foid syenite magma series in terms of K2O + Na2O contents (14.3-15.2 wt.%) and to the shoshonitic series based on their high K2O contents (5.42-5.61 wt.%). The nepheline syenites are further characterized by high light rare earth element contents [(La/Yb) N = 29.1-36.1]; show modest negative Eu anomalies (delta Eu = 0.5-0.6) and positive anomalies in Rb, Th, U, Pb, Zr, and Hf; are depleted in Ba and high field strength elements (P and Ti). In addition, all the nepheline syenites in this study display relatively low radiogenic Sr (Sr-87/Sr-86)(i) (0.7042-0.7043) and positive epsilon(Nd) (t) (0.7-0.8). These results suggest that the nepheline syenites were derived from depleted continental crust. The parent magmas likely experienced fractional crystallization of plagioclase, Ti-bearing oxides (e. g. rutile, ilmenite, and titanite), apatite, and zircon during ascent, with negligible crustal contamination before final emplacement at a high crustal level.
关键词	Nepheline Syenites Petrogenesis Palaeozoic Shanxi Province North China Craton
学科领域	矿床地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/4824
专题	矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文矿床地球化学国家重点实验室
推荐引用方式 GB/T 7714	Shen Liu,Ruizhong Hu,Shan Gao,et al. Age and origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China: U-Pb zircon age and whole-rock geochemical and Sr-Nd isotopic constraints[J]. International Geology Review,2012,54(11):1296-1308.
APA	Shen Liu.,Ruizhong Hu.,Shan Gao.,Caixia Feng.,Ian M. Coulson.,...&Liang Tang.(2012).Age and origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China: U-Pb zircon age and whole-rock geochemical and Sr-Nd isotopic constraints.International Geology Review,54(11),1296-1308.
MLA	Shen Liu,et al."Age and origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China: U-Pb zircon age and whole-rock geochemical and Sr-Nd isotopic constraints".International Geology Review 54.11(2012):1296-1308.

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