贵州乌江水系枯水期河水硫同位素组成研究
Sulfur isotopic compositions of Wujiang River water in Guizhou Province during low-flow period
查看参考文献27篇
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文摘
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对枯水期乌江及其主要支流河水的硫同位素组成进行了研究.河水SO_4~(2-)的δ~(34)S值在-15.7‰～18.9‰之间,干流δ~(34)S值介于-3.7‰～0.0‰之间.主要支流河水的浓度和δ~(34)S值具有明显的区域性差异:上游碳酸盐岩地区支流河水浓度较高而δ~(34)S值较低,河水中的来源于煤中还原态硫的氧化、矿床硫化物氧化和大气降水;下游碳酸盐岩夹碎屑岩地区支流河水则相反,具有较低浓度和较高δ~(34)S值,河水中的来源于硫酸盐蒸发岩溶解、大气降水以及煤中还原态硫的氧化.干流的硫同位素组成显示枯水期河水中的硫酸盐主要来源于碳酸盐岩地区. |
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其他语种文摘
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The sulfur isotopic composition of the Wujiang River water and its catchment area water has been measured during low-flow period. The δ~(34)S values of the river water range from -15.7‰ to 18.9‰, whereas the S34S values of the mainstream show only a narrow range and exhibit negative values from -3.7‰ to 0.0‰. Spatial variation in SO_4~(2-) concentration and δ~(34)S of the tributaries over the catchment area is obvious. The upper part of the Wujiang River catchment is dominated by carbonate rocks and coal-bearing formations. The tributaries with depleted δ~(34)S in this area have high SO_4~(2-) concentrations and dominantly originate from rainwater SO_4~(2-) SO4_4~(2-) from oxidation of sulfur in coal and sulfides deposits. Samples from the tributaries of the lower part, which is dominated by carbonate rocks interbedded with clastic rocks, have relatively enriched ~(34)S and lower SO_4~(2-) concentrations. SO_4~(2-) in these waters appears to result from solution of gypsum, rainwater SO_4~(2-) and oxidation of sulfur in coal. The sulfur isotopic composition of the mainstream indicates that most of the SO_4~(2-) in the Wujiang River water is from the upper part. |
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来源
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地球化学
,2006,35(6):623-628 【核心库】
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关键词
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硫同位素
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枯水期
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乌江水系
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地址
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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
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0379-1726 |
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学科
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地质学;环境科学基础理论 |
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基金
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国家973计划
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中国科学院知识创新工程重要方向项目
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国家自然科学基金
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文献收藏号
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CSCD:2656783
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