Stable isotope fractionation of chlorine during the precipitation of single chloride minerals

	Stable isotope fractionation of chlorine during the precipitation of single chloride minerals
	Chongguang Luo; Yingkai Xiao; Hanjie Wen; Haizhou Ma; Yunqi Ma; Yanling Zhang; Yuxu Zhang; Maoyong He
	2014
发表期刊	Applied Geochemistry
卷号	47 期号:1 页码:141-149
摘要	In order to better understand chlorine isotopic variations during brine evolution, experiments were designed to determine the changes in the chlorine isotope composition (delta Cl-37 value) during evaporations of solutions containing NaCl, KCl and MgCl2 center dot 6H(2)O at 28 +/- 2 degrees C. Three evaporation experiments were conducted in a clean environment. The precipitate and brine samples were collected during the evaporation, and the chlorine isotopic ratios of the samples were determined using an improved thermal ionisation mass spectrometry procedure based on Cs2Cl+ ion measurement. The results are as follows: the mean fractionation factors of the three solutions are alpha(Na) = 1.00055, alpha(K) = 1.00025, and alpha(Mg) = 1.00012, respectively, where alpha(Na), alpha(K) and alpha(Mg) are the fractionation factors between salts (NaCl, KCl and MgCl2 center dot 6H(2)O) and saturated solutions. The results showed that the delta Cl-37 values of precipitate and coexisting brine samples decrease during the precipitation of single chloride minerals. The residual brine was a Cl-35 reservoir for different single chloride solutions. New chlorine isotopic evolution curve during seawater evaporation were also calculated. The results indicated that during the primary precipitation stage of halite, delta Cl-37 decreased continuously, and the most important thing is that this trend continues during the final stages when Mg-salts begin to precipitate.
学科领域	矿床地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5267
专题	矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Chongguang Luo,Yingkai Xiao,Hanjie Wen,et al. Stable isotope fractionation of chlorine during the precipitation of single chloride minerals[J]. Applied Geochemistry,2014,47(1):141-149.
APA	Chongguang Luo.,Yingkai Xiao.,Hanjie Wen.,Haizhou Ma.,Yunqi Ma.,...&Maoyong He.(2014).Stable isotope fractionation of chlorine during the precipitation of single chloride minerals.Applied Geochemistry,47(1),141-149.
MLA	Chongguang Luo,et al."Stable isotope fractionation of chlorine during the precipitation of single chloride minerals".Applied Geochemistry 47.1(2014):141-149.

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