气候变化领域集成服务门户(CCPortal): Nitrogen and noble gas isotopic compositions of mantle xenoliths from Far Eastern Russia: Implications for nitrogen isotopic characteristics of mantle wedge fluid

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DOI	10.1016/j.epsl.2020.116109
	Nitrogen and noble gas isotopic compositions of mantle xenoliths from Far Eastern Russia: Implications for nitrogen isotopic characteristics of mantle wedge fluid
	Yamamoto J.; Takahata N.; Sano Y.; Yanagita M.; Arai S.; Prikhod'ko V.S.
发表日期	2020
ISSN	0012821X
卷号	534
英文摘要	To investigate nitrogen circulation via subduction, we measured isotopic compositions of nitrogen and noble gases of mantle-derived xenoliths from Far Eastern Russia, where the tectonic setting is a plate convergence margin in the Mesozoic to Cenozoic era. Kinetic fractionation accompanies the extraction of volatiles from a subducting plate, engendering the infiltration of fluids with light isotopic compositions into mantle wedge. The δ15N values are −13.26 to +0.19‰, some of which are lower than those of air (0‰) and upper mantle (−5 ± 2‰). The 3He/4He and 40Ar/36Ar ratios are 0.2–5.6 Ra and 304–1156, respectively, which are common for the mantle xenoliths in eastern Asia, a representative subduction setting. The N2/36Ar are 1.5 × 104 – 4.5 × 104, which are much lower than the mantle value (6.7 × 106) and which are rather more similar to atmospheric (2.5 × 104) and deep seawater (1.1 × 104) values. Kinetic fractionation can lower the δ15N value to −15‰ without marked change of the N2/36Ar ratio. Therefore, the low δ15N values of the present xenoliths might be regarded as values of the fluid experiencing fractionation during infiltration of the fluid from the subducting oceanic plate into the mantle wedge. © 2020 Elsevier B.V.
关键词	fluid inclusion mantle wedge mantle xenolith nitrogen isotope noble gases
英文关键词	Isotopes; Nitrogen; Fluid inclusion; Isotopic composition; Kinetic fractionations; Mantle wedge; Mantle xenoliths; Nitrogen isotopes; Noble gas isotopic composition; Tectonic settings; Inert gases; Cenozoic; fluid inclusion; igneous geochemistry; isotopic composition; mantle; Mesozoic; nitrogen isotope; noble gas; plate convergence; subduction; tectonic setting; xenolith; Russian Federation
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202978
作者单位	The Hokkaido University Museum, Nishi 8, Kita 10, Kita-ku, Sapporo, 060-0810, Japan; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, 277-8564, Japan; Institute of Surface-Earth System Science, Tianjin University, Nankai District, Tianjin, 300072, China; Graduate School of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo, 060-0810, Japan; Department of Earth Sciences, Faculty of Science, Kanazawa University, Kakuma, Kanazawa, 920-1192, Japan; Institute of Tectonics and Geophysics (Far Eastern Branch, Russian Academy of Sciences), 65 Kim Yu Chen Str., Khabarovsk, 680063, Russian Federation
推荐引用方式 GB/T 7714	Yamamoto J.,Takahata N.,Sano Y.,et al. Nitrogen and noble gas isotopic compositions of mantle xenoliths from Far Eastern Russia: Implications for nitrogen isotopic characteristics of mantle wedge fluid[J],2020,534.
APA	Yamamoto J.,Takahata N.,Sano Y.,Yanagita M.,Arai S.,&Prikhod'ko V.S..(2020).Nitrogen and noble gas isotopic compositions of mantle xenoliths from Far Eastern Russia: Implications for nitrogen isotopic characteristics of mantle wedge fluid.Earth and Planetary Science Letters,534.
MLA	Yamamoto J.,et al."Nitrogen and noble gas isotopic compositions of mantle xenoliths from Far Eastern Russia: Implications for nitrogen isotopic characteristics of mantle wedge fluid".Earth and Planetary Science Letters 534(2020).