【作者】 王涛； 王增银；

【Author】 WANG Tao WANG Zengyin School of Environmental Studies,China University of Geosciences,Wuhan,Hubei,430074

【机构】 中国地质大学(武汉)环境学院；

【摘要】 锶是岩石圈上部含量最大的微量元素,其元素及其同位素化学性质都比较稳定。不同水岩作用条件下,锶元素含量及其同位素值都不一样。本文通过对桂林地区的两个典型岩溶地下河系统不同类型地下水样⁸⁷Sr/⁸⁶Sr 值和Sr 含量的分析,得出:流经不同岩层的地下水其⁸⁷Sr/⁸⁶Sr 值和Sr 含量不同,同一地下河系统中不同类型地下水的⁸⁷Sr/⁸⁶Sr 值Sr 含量不同,其值的差异由岩性和水岩作用决定。说明⁸⁷Sr/⁸⁶Sr 值能反映地下水的形成、径流和混合作用,是较理想的示踪剂,在岩溶水研究中具有很广阔的应用前景。更多还原

【Abstract】 Strontium is the richest trace element in upper lithosphere.Due to its stable chemical characteristics,it is inactive to mostsubstances under natural conditions.The Sr concentrations and ⁸⁷Sr/⁸⁶Sr ratios are obviously different in different water-rock interac-tion settings.Based on analyzing Sr²⁺ and ⁸⁷Sr/⁸⁶Sr of different groundwater samples in two underground river systems,this paperhas drawn some conclusions.Underground waters passing through different strata have different ⁸⁷Sr/⁸⁶Sr ratios and Sr concentra-tions,and different types of underground waters in the same underground river system have different ⁸⁷Sr/⁸⁶Sr ratios and Sr concen-trations.These differences depend on the strata and the water rock interaction.Therefore,the ⁸⁷Sr/⁸⁶Sr ratio can reflect the forma-tion,runoff and mixing of underground water and hence is an ideal tracer with a wide application vista in karst water research.更多还原