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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第34卷

期数:

2012年第03期

页码:

83-88

栏目:

水资源与环境

出版日期:

2012-09-20

文章信息/Info

Title:

Seasonal Variation of Sulfur Isotope in Dengzhanhe Karst Spring of Puding, Guizhou

作者:

赵敏¹; 2; 曾成¹; 2; 杨睿¹; 2; 刘再华¹; 2

1.中国科学院地球化学研究所 环境地球化学国家重点实验室,贵州 贵阳 550002; 2.中国科学院地球化学研究所 普定喀斯特生态综合试验站,贵州 普定 562100

Author(s):

ZHAO Min¹; 2;  ZENG Cheng¹; 2;  YANG Rui¹; 2;  LIU Zai-hua¹; 2

1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, Guizhou, China; 2. Puding Comprehensive Karst Ecological Experiment Station,Institute of Geochemistry, Chinese Academy of Sciences, Puding 562100, Guizhou, China

关键词:

水文地球化学;  硫同位素;  溶解;  氧化;  有机硫;  泉;  岩溶;  贵州

Keywords:

hydrogeochemistry;  sulfur isotope;  dissolution;  oxidation;  organic sulfur;  spring;  karst;  Guizhou

分类号:

P595; P641.3

DOI:

-

文献标志码:

-

摘要:

通过对贵州普定后寨地下河补给区的灯盏河岩溶泉为期1年的泉水水文地球化学特征与水中SO^2-₄的硫同位素组成及季节性变化规律的分析,揭示灯盏河岩溶泉泉水中硫酸盐的来源及形成机理。结果表明:灯盏河岩溶泉的水化学类型主要为HCO^-₃·SO^2-₄-Ca²⁺型,具有很高的硫酸盐浓度,且变化幅度较大,SO^2-₄浓度为0.35～8.76 mmol·L^-1; 灯盏河泉水SO^2-₄的硫同位素组成为(3.80～25.76)×10^-3,反映泉水的硫同位素组成主要受土壤有机硫氧化和石膏岩层溶解的控制; 泉水硫同位素组成季节性变化明显,表现为旱季大于雨季,且旱季变化平缓,主要受石膏溶解的控制,而雨季变化幅度较大,反映雨季地下水硫酸盐土壤有机硫源贡献的增加及其季节性差异。

Abstract:

The concentration of sulfate is high in Dengzhanhe karst spring located in the recharge area of Houzhai underground river of Puding, Guizhou. Hydrogeochemistry characteristics of the spring, sulfur isotopic composition of SO^2-₄ and their seasonal changes were analyzed during a hydrological year, and the source and formation mechanism of sulfate in the spring were revealed. The results showed that the hydrochemical type of Dengzhanhe karst spring was HCO^-₃·SO^2-₄-Ca²⁺, the concentration of sulfate was very high and the range of variation was significant, the concentration of SO^2-₄ was 0.35-8.76 mmol·L^-1; the sulfur isotopic composition of SO^2-₄ in the spring was(3.80-25.76)×10^-3, and indicated that the sulfur isotopic composition was mainly controlled by dissolution of gypsum and oxidation of organic sulfur in soil; seasonal variation of sulfur isotopic composition was remarkable, and indicated that sulfur isotopic composition in dry season was more than that in rainy season, and the change of composition in dry season was small and mainly controlled by the dissolution of gypsum, but the change in rainy season was large and reflected the increase of organic sulfur for underground sulfate soil and its seasonal difference.

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备注/Memo

备注/Memo:

收稿日期:2011-10-16
基金项目:国家自然科学基金项目(41103084,41003056); 贵州省博士基金项目(2011GZ62743)
作者简介:赵 敏(1980-),女,贵州兴义人,助理研究员,理学博士,E-mail:zhaomin@mails.gyig.ac.cn。

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更新日期/Last Update: 2012-09-20