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• 基金项目：

• 郑宝山
• 中国科学院贵阳地球化学研究所

• 摘要：从野外样品的分析和理论分析两方面证明,在苏打盐渍化过程中,土壤溶液的pH值增高,K⁺、Na⁺、HCO₃^-、CO₃^2-含量增加,这将导致水溶性氟在土壤中的集聚并形成高氟地下水.阐明了在我国北方苏打盐渍化区与潜水高氟型地方性氟病区一致的原因.潜水高氟型地方性氟病区往往发生过古代苏打盐渍化过程,在此过程中积聚的水溶性氟是现代高氟地下水中氟的重要来源.中更新世是我国北方风化壳和土壤中水溶性氟积聚的重要时期.

• Abstract：Analyses of the soil samples and ground water as well as the calculation of chemical equilibria have proved that a large amount of water-soluble fluorides have been accumulated on the surface soil and provided ground water with abundant fluorine during the process of soda-salinization. The ground water with the highest fluorine content is often related to water-soluble fluoride-rich sediments of middle pleistocene which were the products of paleo-soda-salinization.

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