鞍山市倪家台地热田水化学特征及其演化机制  

STUDY ON THE HYDROCHEMICAL CHARACTERISTICS AND EVOLUTION MECHANISM OF GEOTHERMAL FIELD IN NIJIATAI OF ANSHAN CITY

作　　者：杨维[1] 郭亚伟[1] 康志勇 李仁峰 孙浩然[1] 陈淼琚[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,沈阳110168 [2]辽宁省冶金地质勘察局地质勘察研究院,鞍山114038

出　　处：《环境化学》2010年第2期324-328,共5页Environmental Chemistry

基　　金：辽宁省自然科学基金项目(20072012);辽宁省冶金局科技项目(20071207)

摘　　要：水化学分析结果表明,鞍山市倪家台地下热水属于HCO3.SO4-Na和SO4.HCO3-Na型水,且含有氟、锶和二氧化硅等多种矿物成分.由构建的硅-焓混合模型得出倪家台地区地下热水已有大量冷水混入,且混入比例介于67%—83%之间,水温下降的诱因是该区域过量开采地热水,在这种人为的长期干扰作用下,增大了上部含水层冷水对下部地热水的补给量,对今后可持续利用该区域地热资源构成了严重的威胁.Hydrochemistry analysis results has indicated that the geothermal water in Nijia-Tai belongs to the types of HCO3 - SO,-Na and SO4 · HCO3-Na. It also contains a great deal of minerals such as fluoride, strontium and silicon dioxide. By the silicon-enthalpy mixing model, it was deduced that the geothermal water in Nijia-Tai has been mixed with the upper cold groundwater and the mix proportion is between 67% and 83%. The over-exploitation to the geothermal water results in its temperature drop. With the long-term disraption by human-beings, the recharging amount of upper cold aquifer to the lower geothermal water is increasing, which, if not changed, would seriously threat the sustainable utilization of geothermal resources in this area.

关 键 词：地热田 水化学 混合模型 冷水混入 水温下降. 

分 类 号：X132[环境科学与工程—环境科学]