The lithium isotopic composition and geochemical implication of ultrahigh-pressure marbles from the Dabie-Sulu orogen, China

doi:10.1016/j.jseaes.2020.104376

	The lithium isotopic composition and geochemical implication of ultrahigh-pressure marbles from the Dabie-Sulu orogen, China
	Wan, Hongqiong 1; Xiao, Yilin 1,2; Sun, He 1,3; Liu, Haiyang 1,4; Wang, Yangyang 1; Li, Dongyong 1; Li, Wang-ye 1
	2020-06-15
发表期刊	JOURNAL OF ASIAN EARTH SCIENCES
ISSN	1367-9120
卷号	195 页码:12
通讯作者	Xiao, Yilin(ylxiao@ustc.edu.cn)
摘要	Subduction zones are important in materials' cycling between Earth's surface and mantle. We report lithium (Li) contents and isotopic compositions (delta Li-7) of ultrahigh-pressure (UHP) marbles of the Dabie-Sulu orogen, with the aim of elucidating the geochemical behavior of Li isotopes during deep subduction of surficial carbonates and exploring the application of Li isotopes in tracing subduction and material-cycling. Pure UHP marbles (with delta Li-7 values up to 21.5 parts per thousand) show significantly heavier isotopic compositions than those of the mantle (2.0 parts per thousand-5.7 parts per thousand; average 3.7 parts per thousand), while impure marbles containing some silicates have delta Li-7 values as low as 1.3 parts per thousand. Weathering, fluid infiltration, and isotopic fractionation have negligible effects on the Li isotopic compositions of UHP marbles. Exhumed UHP marbles might be good samples to study those residual carbonates entering into the deep mantle. When subducted carbonates transport heavy Li isotopic signatures to mantle depths, they may result in local Li isotopic heterogeneity. As Li is a trace element and UHP marbles have significantly different delta Li-7 signatures to the mantle, Li isotopic geochemistry might be useful in tracing deep carbon cycling.
关键词	Lithium isotopes Deep carbon cycling UHP marble Dabie-Sulu orogen Subduction
DOI	10.1016/j.jseaes.2020.104376
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41673031] ; National Natural Science Foundation of China[41729001] ; National Natural Science Foundation of China[41603005] ; Strategic Priority Research Program (B) of Chinese Academy of Sciences[XDB18000000]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000536141200022
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/167597
专题	深海极端环境与生命过程研究中心
通讯作者	Xiao, Yilin
作者单位	1.Univ Sci & Technol China, CAS Key Lab Crust Mantle Mat & Environm, Sch Earth & Space Sci, Hefei 230026, Peoples R China 2.CAS Ctr Excellence Comparat Planetol, Hefei, Anhui, Peoples R China 3.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China 4.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Wan, Hongqiong,Xiao, Yilin,Sun, He,et al. The lithium isotopic composition and geochemical implication of ultrahigh-pressure marbles from the Dabie-Sulu orogen, China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2020,195:12.
APA	Wan, Hongqiong.,Xiao, Yilin.,Sun, He.,Liu, Haiyang.,Wang, Yangyang.,...&Li, Wang-ye.(2020).The lithium isotopic composition and geochemical implication of ultrahigh-pressure marbles from the Dabie-Sulu orogen, China.JOURNAL OF ASIAN EARTH SCIENCES,195,12.
MLA	Wan, Hongqiong,et al."The lithium isotopic composition and geochemical implication of ultrahigh-pressure marbles from the Dabie-Sulu orogen, China".JOURNAL OF ASIAN EARTH SCIENCES 195(2020):12.

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