Serpentinite-derived low delta Li-7 fluids in continental subduction zones: Constraints from the fluid metasomatic rocks (whiteschist) from the Dora-Maira Massif, Western Alps

doi:10.1016/j.lithos.2019.105177

	Serpentinite-derived low delta Li-7 fluids in continental subduction zones: Constraints from the fluid metasomatic rocks (whiteschist) from the Dora-Maira Massif, Western Alps
	Tian, Ye 1; Xiao, Yilin 1,2; Chen, Yi-Xiang 1,2; Sun, He 1,3; Liu, Haiyang 1,4; Tong, Fengtai 1; Yang, Jie-Hua 5; Schertl, Hans-Peter 6,7
	2019-12-01
Source Publication	LITHOS
ISSN	0024-4937
Volume	348 Pages:9
Abstract	Whole rock lithium (Li) and Li isotopic compositions of coesite-bearing whiteschists and their country rock metagranites from the Dora-Maira Massif in the Western Alps were investigated to understand their behavior during fluid-rock interaction in mantle depths of continental subduction zones. The whiteschists reveal relatively low delta Li-7 values (-6.4 parts per thousand to +2.4 parts per thousand, with an average value of -2.1 parts per thousand) in comparison to the country rock metagranites (delta Li-7 = -1.2 parts per thousand to +3.6 parts per thousand, with an average value of +1.4 parts per thousand). The delta Li-7 values of whiteschists do not show any correlations with major elements (e.g. Mg, Fe), Li, or isotopes (i.e., delta Mg-26 and delta O-18 values) and cannot be explained by kinetic fractionation. Hence, the low delta Li-7 values of whiteschists result from interactions with metasomatic fluids containing isotopically light Li that occurred in deep portions of a continental subduction zone. Fluid-rock interaction modeling suggests that the metasomatic fluids contain low delta Li-7 values (down to -4 parts per thousand) and moderate Li concentrations (50 to 150 ppm), which were probably derived from the dehydration of serpentinites in the subduction channel. The presence of such low delta Li-7 fluids in deep subduction zones could cause Li isotopic heterogeneity in the earth's interior. (C) 2019 Elsevier B.V. All rights reserved.
Keyword	Lithium isotopes Metasomatism Whiteschist Serpentinite Western Alps
DOI	10.1016/j.lithos.2019.105177
Indexed By	SCI
Language	英语
Funding Project	State Key Laboratory of Ore Deposit Geochemistry open funds[201608] ; Youth Innovation Promotion Association of CAS[2014300] ; Natural Science Foundation of China[41473033] ; Natural Science Foundation of China[41773021] ; Natural Science Foundation of China[41622302] ; Natural Science Foundation of China[41673031] ; Strategic Priority Research Program (B) of CAS[XDB18020000] ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Strategic Priority Research Program (B) of CAS[XDB18020000] ; Natural Science Foundation of China[41673031] ; Natural Science Foundation of China[41622302] ; Natural Science Foundation of China[41773021] ; Natural Science Foundation of China[41473033] ; Youth Innovation Promotion Association of CAS[2014300] ; State Key Laboratory of Ore Deposit Geochemistry open funds[201608]
WOS Research Area	Geochemistry & Geophysics ; Mineralogy
WOS Subject	Geochemistry & Geophysics ; Mineralogy
WOS ID	WOS:000500375700004
Publisher	ELSEVIER
Citation statistics	Cited Times:3[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Version	出版稿
Identifier	http://ir.qdio.ac.cn/handle/337002/163745
Collection	深海极端环境与生命过程研究中心
Corresponding Author	Xiao, Yilin; Chen, Yi-Xiang
Affiliation	1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China 2.CAS Ctr Excellence Comparat Planetol, Hefei, Anhui, Peoples R China 3.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Shandong, Peoples R China 5.Chinese Acad Sci, State Key Lab Ore Deposit Geochem, Inst Geochem, Guiyang 550081, Guizhou, Peoples R China 6.Ruhr Univ Bochum, Inst Geol Mineral & Geophys, Fac Geosci, D-44780 Bochum, Germany 7.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Shandong, Peoples R China
Recommended Citation GB/T 7714	Tian, Ye,Xiao, Yilin,Chen, Yi-Xiang,et al. Serpentinite-derived low delta Li-7 fluids in continental subduction zones: Constraints from the fluid metasomatic rocks (whiteschist) from the Dora-Maira Massif, Western Alps[J]. LITHOS,2019,348:9.
APA	Tian, Ye.,Xiao, Yilin.,Chen, Yi-Xiang.,Sun, He.,Liu, Haiyang.,...&Schertl, Hans-Peter.(2019).Serpentinite-derived low delta Li-7 fluids in continental subduction zones: Constraints from the fluid metasomatic rocks (whiteschist) from the Dora-Maira Massif, Western Alps.LITHOS,348,9.
MLA	Tian, Ye,et al."Serpentinite-derived low delta Li-7 fluids in continental subduction zones: Constraints from the fluid metasomatic rocks (whiteschist) from the Dora-Maira Massif, Western Alps".LITHOS 348(2019):9.

Files in This Item:
File Name/Size	DocType	Version	Access	License
Serpentinite-derived（1484KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View

File name:	Serpentinite-derived low δ7Li fluids in continental subduction zones_ Constraints from the fluid metasomatic rocks (whiteschist) from the Dora-Maira Massif, Western Alps.pdf
Format:	Adobe PDF

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

中国科学院海洋研究所机构知识库