云南腾冲地区地热流体的地球化学特征  

Geochemical characteristics of geothermal fluid in Tengchong Area,Yunnan Province,China

作　　者：刘虹[1,2] 张国平[1] 金志升[1] 刘丛强[1] 韩贵琳[1] 李玲[1,2] 

机构地区：[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]中国科学院研究生院,北京100039

出　　处：《矿物学报》2009年第4期496-501,共6页Acta Mineralogica Sinica

基　　金：中国科学院创新团队国际合作伙伴计划和中国科学院重要方向项目(KZCX3-SW-140)

摘　　要：对云南热海和瑞滇地区地热流体的地球化学特征进行了分析和探讨,并据此评估了地热流体对环境的影响。结果显示,研究区的碱性热泉中K、Na、F、Cl、SiO2的含量高,而只存在于热海地区的酸性热泉中SO42-、Mn、Fe的含量高。热泉中As、Sb的含量范围分别在43.6～687μg/L和0.38～23.8μg/L之间。热泉中以As(Ш)为主,占了总砷的91%。地热流体中的As、Sb—部分被固定在泉华中,而另一部分则释放到了环境中,从而进入地下水和下游的田地中,对当地居民的健康造成威胁。The geochemical characteristics of the hot spring waters in the Rehai and Ruidian geothermal fields, Teng- chong County, Yunnan Province, China, were described and their possible environmental impact was assessed. The results show that the alkaline spring waters contain high levels of K, Na, F, C1, and SiO2, whereas the only acidic spring water in Rehai geothermal field contains high levels of SQ2, Mn and Fe. As and Sb in the spring waters are in the ranges of 43.6-687μg/L and 0. 38-23.8 μg/L, respectively. As（Ⅲ） occurs in most spring waters, and the fraction of As（Ⅲ） is up to 91% of total As. Fractions of geothermal As and Sb are trapped in the sinter deposits while most of them enter the environment. The diffusion of As and Sb into groundwater and downstreams in crop fields constitutes a threat to the health of the local population.

关 键 词：热泉 地球化学行为 热海 瑞滇 云南 

分 类 号：P592[天文地球—地球化学] X142[天文地球—地质学]