乌江干支流河水中U元素的地球化学特征
Geochemical Characteristics of Dissolved U in the Wujiang River
查看参考文献20篇
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文摘
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本研究对乌江流域河水U浓度进行了测定,系统讨论了乌江流域干支流河水中U的元素地球化学特征,并对其主要来源进行了辨析.研究结果显示,乌江河水中溶解态U的平均浓度约为0.504_(μg)/L,比世界河流平均水平0.186_(μg)/L及长江平均含量0.45_(μg)/L高,但是低于黄河U含量4.86_(μg)/L,同时也低于世界平均海水U浓度3.3_(μg)/L.来源分析显示,乌江河水中的U主要来源于碳酸盐岩风化,尤其是白云岩的风化,对U行为有决定性的控制作用,说明了在海洋沉积成岩过程中生物作用过程对U行为的重要性.蒸发岩和硅酸盐等的风化过程对乌江河水U的贡献不大.和十年前相比,人类活动对流域河水U的影响明显增加 |
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其他语种文摘
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The concentrations of dissolved U were measured in the Wujiang River and its major tributaries. Meanwhile, the geochemical characteristics of dissolved U have been discussed, including the relations between the water chemical characteristics, lithological characters and human activities. The results showed that the average concentration of dissolved U in the Wujiang River is 0.504_(μg)/L, higher than the global average(0.186_(μg)/L)and Yangtze average(0.45_(μg)/L), but lower than that of the Yellow River(4.86_(μg)/L).The concentrations of dissolved U in the Wujiang River Basin are mainly controlled by dissolution of carbonate rocks, especially by dolostones, indicating that the geochemical characteristics of U are effected significantly by biological activities during diagenesis of marine carbonates. Compared with the situation ten years ago, the impact of human activities on U concentrations in the Wujiang River Basin has been obviously enhanced |
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来源
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地球与环境
,2010,38(4):402-408 【核心库】
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关键词
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乌江流域
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铀
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风化
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碳酸盐岩
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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;;天津市水环境与水资源重点实验室, 贵州, 贵阳, 550002
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语种
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中文 |
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ISSN
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1672-9250 |
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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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国家自然科学基金
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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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文献收藏号
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CSCD:4108308
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