Peridotite and pyroxenite xenoliths from Tarim, NW China: Evidences for melt depletion and mantle refertilization in the mantle source region of the Tarim flood basalt

doi:10.1016/j.lithos.2014.01.005

	Peridotite and pyroxenite xenoliths from Tarim, NW China: Evidences for melt depletion and mantle refertilization in the mantle source region of the Tarim flood basalt
	Chen, Mi-Mi 1; Tian, Wei 1; Suzuki, Katsuhiko 2; Tejada, M. -L-G.2; Liu, Feng-Lin 1; Senda, Ryoko 2; Wei, Chun-Jing 1; Chen, Bin 1; Chu, Zhu-Yin 3
刊名	LITHOS
	2014-09-01
卷号	204 页码:97-111
关键词	Mantle xenolith Peridotite Pyroxenite Tarim flood basalt Mantle plume Re-Os isotope
ISSN号	0024-4937
DOI	10.1016/j.lithos.2014.01.005
文献子类	Article
英文摘要	Mantle-derived spinel peridotite and spinel plagioclase pyroxenite xenoliths hosted in Cenozoic alkali basalts (20 Ma) are found in the Xikeer area, western Tarim Block, NW China. Based on petrographic and geochemical characteristics, the peridotite xenoliths are divided into three groups. Group 1 peridotite xenoliths have experienced high degree melt extraction (similar to 17% fractional melting) and weak, incipient metasomatism. Group 2 and 3 peridotite xenoliths have undergone extensive silicate melt metasomatism, resulting in clinopyroxenes with spoon-shaped and highly fractionated REE patterns respectively. Although their present texture is metamorphic, the pyroxenite xenoliths were initially of metasomatic origin, with high pressure protolith mineral assemblage of orthopyroxene + clinopyroxene + spinel +/- olivine. Numerical modeling of the Mg-number shows that the Xikeer pyroxenites may have resulted from reaction between Group 1 peridotite and a primitive Permian picritic melt at a high melt/rock ratio (>15) and that the host basanite is incapable of being the metasomatic melt The Re-Os isotopic systematics of the Xikeer peridotites and pyroxenites yield an apparent isochron of similar to 290 Ma, virtually identical to the age of Tarim flood basalts. Their epsilon(Nd)(t = 290 Ma) ranges from + 9.5 to +143, typical of convecting mantle. We propose that the Xikeer xenolith suite may have been initially formed by melt extraction from the convecting mantle and, shortly after, was refertilized by Tarim mantle plume melts during the Early Permian, a process which is referred to as mantle 'auto-refertilization'. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词	OCEANIC UPPER-MANTLE ; SUBCONTINENTAL LITHOSPHERIC MANTLE ; NORTHWEST CHINA ; ABYSSAL PERIDOTITES ; REFRACTORY MANTLE ; CONTINENTAL LITHOSPHERE ; GEOLOGICAL IMPLICATIONS ; LHERZOLITE XENOLITHS ; ULTRAMAFIC XENOLITHS ; SPINEL-LHERZOLITES
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000342260400010
资助机构	NSFC(41072040 ; NSFC(41072040 ; "973" project(2010CB808906) ; "973" project(2010CB808906) ; 41121062 ; 41121062 ; 41272368) ; 41272368) ; NSFC(41072040 ; NSFC(41072040 ; "973" project(2010CB808906) ; "973" project(2010CB808906) ; 41121062 ; 41121062 ; 41272368) ; 41272368) ; NSFC(41072040 ; NSFC(41072040 ; "973" project(2010CB808906) ; "973" project(2010CB808906) ; 41121062 ; 41121062 ; 41272368) ; 41272368) ; NSFC(41072040 ; NSFC(41072040 ; "973" project(2010CB808906) ; "973" project(2010CB808906) ; 41121062 ; 41121062 ; 41272368) ; 41272368)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85624]
专题	中国科学院地质与地球物理研究所
通讯作者	Tian, Wei
作者单位	1.Peking Univ, Sch Earth & Space Sci, MOE, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China 2.Japan Agcy Marine Earth Sci & Technol, Inst Res Earth Evolut, Yokosuka, Kanagawa 2370061, Japan 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Chen, Mi-Mi,Tian, Wei,Suzuki, Katsuhiko,et al. Peridotite and pyroxenite xenoliths from Tarim, NW China: Evidences for melt depletion and mantle refertilization in the mantle source region of the Tarim flood basalt[J]. LITHOS,2014,204:97-111.
APA	Chen, Mi-Mi.,Tian, Wei.,Suzuki, Katsuhiko.,Tejada, M. -L-G..,Liu, Feng-Lin.,...&Chu, Zhu-Yin.(2014).Peridotite and pyroxenite xenoliths from Tarim, NW China: Evidences for melt depletion and mantle refertilization in the mantle source region of the Tarim flood basalt.LITHOS,204,97-111.
MLA	Chen, Mi-Mi,et al."Peridotite and pyroxenite xenoliths from Tarim, NW China: Evidences for melt depletion and mantle refertilization in the mantle source region of the Tarim flood basalt".LITHOS 204(2014):97-111.