Stable isotope fractionation of chlorine during evaporation of brine from a saline lake

ISL OpenIR > 青海盐湖研究所知识仓储

	Stable isotope fractionation of chlorine during evaporation of brine from a saline lake
	Luo ChongGuang 1,3; Xiao YingKai 1; Ma HaiZhou 1; Ma YunQi 1; Zhang YanLing 1,3; He MaoYong 2
	2012-05-01
发表期刊	CHINESE SCIENCE BULLETIN
卷号	57 期号:15 页码:1833-1843
关键词	Saline Lake Brine Evaporation Chlorine Stable Isotope Fractionation
摘要	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.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5550
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, CAS Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Luo ChongGuang,Xiao YingKai,Ma HaiZhou,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 ChongGuang,Xiao YingKai,Ma HaiZhou,Ma YunQi,Zhang YanLing,&He MaoYong.(2012).Stable isotope fractionation of chlorine during evaporation of brine from a saline lake.CHINESE SCIENCE BULLETIN,57(15),1833-1843.
MLA	Luo ChongGuang,et al."Stable isotope fractionation of chlorine during evaporation of brine from a saline lake".CHINESE SCIENCE BULLETIN 57.15(2012):1833-1843.