Isotopic compositions of the peridotitic xenoliths from the Nushan area, Anhui Province: Constraints on the age of subcontinental lithospheric mantle beneath the East China

	Isotopic compositions of the peridotitic xenoliths from the Nushan area, Anhui Province: Constraints on the age of subcontinental lithospheric mantle beneath the East China
	Liu ZhiChao 1; Wu FuYuan 1; Chu ZhuYin 1; Xu XiSheng 2
刊名	ACTA PETROLOGICA SINICA
	2010-04-01
卷号	26 期号:4 页码:1217-1240
关键词	Nushan Lithospheric Mantle Sr-nd-hf-os Isotope Pge
ISSN号	1000-0569
文献子类	Article
英文摘要	Nushan volcano, located in Anhui Province, contains abundant and various mantle-derived peridotitic xenoliths, including spinel lherzolite, garnet lherzolite and spinel-garnet lherzolite, with minor harzburgite. Some spinel lherzolites contain amphibole, phlogopite and apatite, indicating that they had experienced mantle metasomatism. Petrological, mineralogical and geochemical data of the spinel lherzolites and harzbuigites revealed that the former are fertile and the latter are refractory. Depleted Sr-Nd-Hf isotopic characteristics of the spinel lherzolites indicate that they are typical of oceanic peridotites, rather than of Archean lithospheric mantle. Furthermore, most spinal lherzolites have high (187)Os/(188)Os ratios. Although the lithospheric mantle beneath the Nushan are has been strongly metasomatismed by fluids/melts, the Os isotopes and PGE (Platinum Group Element) data display that the Os isotopic composition of the Nushan peridotites are not significantly affected by later mantle metasomatism processes. All these geochemical data of most spinel lherzolites indicate that the lithospheric mantle beneath Nushan are young (Phanerozoic) additions to the subcontinental lithospheric mantle (SCLM) from the convective asthenospheric mantle. However, one harzburgite has relatively lower (187)Os/(188)Os ratio of 0.1184 and ancient Re-depletion age of 1.5Ga, suggesting existence of some ancient component in the asthenosphere.
WOS关键词	SINO-KOREAN CRATON ; MESOZOIC ADAKITIC ROCKS ; LOWER CONTINENTAL-CRUST ; TRACE-ELEMENT ; RE-OS ; ABYSSAL PERIDOTITES ; SPINEL PERIDOTITE ; SOUTH CHINA ; SE CHINA ; CENOZOIC BASALTS
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000277950600019
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/72962]
专题	中国科学院地质与地球物理研究所
通讯作者	Liu ZhiChao
作者单位	1.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Nanjing Univ, State Key Lab Mineral Deposit Res, Dept Earth Sci, Nanjing 210093, Peoples R China
推荐引用方式 GB/T 7714	Liu ZhiChao,Wu FuYuan,Chu ZhuYin,et al. Isotopic compositions of the peridotitic xenoliths from the Nushan area, Anhui Province: Constraints on the age of subcontinental lithospheric mantle beneath the East China[J]. ACTA PETROLOGICA SINICA,2010,26(4):1217-1240.
APA	Liu ZhiChao,Wu FuYuan,Chu ZhuYin,&Xu XiSheng.(2010).Isotopic compositions of the peridotitic xenoliths from the Nushan area, Anhui Province: Constraints on the age of subcontinental lithospheric mantle beneath the East China.ACTA PETROLOGICA SINICA,26(4),1217-1240.
MLA	Liu ZhiChao,et al."Isotopic compositions of the peridotitic xenoliths from the Nushan area, Anhui Province: Constraints on the age of subcontinental lithospheric mantle beneath the East China".ACTA PETROLOGICA SINICA 26.4(2010):1217-1240.