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Stable isotope fractionation of chlorine during evaporation of brine from a saline lake
Luo, CG (Luo Chongguang)[1,3]; Xiao,YK(Xiao Yingkai)[1]; Ma, HZ (Ma Haizhou)[1]; Ma, YQ (Ma Yunqi)[1]; Zhang, YL (Zhang Yanling)[1,3]; He, MY (He Maoyong)[2]
2012-05-30
Source PublicationCHINESE SCIENCE BULLETIN
Volume57Issue:15Pages:1833-1843
Subtype期刊论文
Abstract

Brine from the saline Qarhan Lake was evaporated at 28 +/- 2A degrees C in a clean environment. Two groups of experiments were conducted; one with complete separation of precipitate and brine at different stages of evaporation, and the other with continuous precipitation during the evaporation. Seventy-nine precipitate and brine samples were collected during the experiments, and the Cl-37 values were determined using an improved thermal ionization mass spectrometry procedure for precise measurement of chlorine isotopes based on Cs2Cl+ ions. Based on the concentrations of Na+, K+, and Mg2+, evaporation was divided into three main precipitation stages as follows: halite dominant, carnallite dominant, and bischofite dominant. The Cl-37(solid) and Cl-37(liquid) values of the precipitate and coexisting brine samples at different stages showed the following characteristics. The precipitates were enriched with Cl-37 relative to the coexisting brine samples, and the Cl-37 of both the precipitate and brine samples decreased gradually during evaporation. The fractionation factors ( (h)) between halite and brine were the highest, followed by that ( (c)) between carnallite and brine, and then that ( (b)) between bischofite and brine. The (c) and (b) values of less than one, which indicate the precipitate is enriched in Cl-35, were found when the evaporation process entered a new stage. However, the Cl-37 values of carnallite, bischofite, and the coexisting brine samples decreased during evaporation. The residual brine is a Cl-35 reservoir. The experimental phenomena were consistent with the Cl-37 values in saline deposits in the literature. Cl-37 can be used as an indicator of brine evaporation processes, which is important in the exploration of sylvinite deposits.

DOI10.1007/s11434-012-4994-5
Indexed BySCI
Language英语
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Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10155
Collection加速器质谱中心
Corresponding AuthorLuo, CG (Luo Chongguang)[1,3]
Affiliation1.CAS Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences,Xining 810008, China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
3.Graduate University, Chinese Academy of Sciences, Beijing 100049, China
Recommended Citation
GB/T 7714
Luo, CG ,Xiao,YK,Ma, HZ ,et al. Stable isotope fractionation of chlorine during evaporation of brine from a saline lake[J]. CHINESE SCIENCE BULLETIN,2012,57(15):1833-1843.
APA Luo, CG ,Xiao,YK,Ma, HZ ,Ma, YQ ,Zhang, YL ,&He, MY .(2012).Stable isotope fractionation of chlorine during evaporation of brine from a saline lake.CHINESE SCIENCE BULLETIN,57(15),1833-1843.
MLA Luo, CG ,et al."Stable isotope fractionation of chlorine during evaporation of brine from a saline lake".CHINESE SCIENCE BULLETIN 57.15(2012):1833-1843.
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