摘要
选取重庆市温塘峡背斜作为研究区域,采用水化学方法,探讨了该区内地下热水资源特征.研究发现,由于地质背景条件基本相同,温塘峡背斜地下热水水文地球化学特征比较接近,水化学类型为SO4-Ca(Mg)型,且热水中含有较多锶、氟、锂、硼以及硫化氢、氡气等对人体健康有医疗保健作用的微量元素和气体成分,是较优的医疗热矿水.大气降水是本区地下热水的主要补给源,补给高程约960 m,主要热储含水层为下三叠统嘉陵江组地层(T1j).Na-K-Mg图解模型显示,5个泉点样品投点均落在Mg1/2角,属于未成熟水,表明该区水岩反应平衡温度不高,可能有冷水混入.多矿物平衡图解显示,5种矿物中,只有石英的lg(Q/K)-T曲线最接近饱和线,根据此曲线估测的该区热储温度为65～82℃,与运用石英温标计算所得热储温度基本一致.
Wentang Valley Anticline is selected as study area,and thermal water resources in this area will be discussed in this paper.Because of the same geological backgrounds,the hydrogeochemical features of the thermal water are similar in this study area,and the hydrochemical type is SO4-Ca（Mg）.In addition,the thermal water contains multiplicate and sanative microelements and gases,such as Sr,F,Li,B,H2S and Rn,so it is superior medical thermal water.The thermal water source is atmosphere precipitation.And its aquifer may be the stratum of Jialingjiang formation in Lower Trias（T1j）.The recharge area of the thermal water may be the karst outcrops area on the north of the anticline,which elevation is 960 m.Na-K-Mg diagram shows that five water samples fall in the region of immature water.Therefore it can be said that it has low temperture in the fluid-rock processes and the thermal water may be mixed.Mineral equilibrium diagram（lg（Q/K）-T diagram） indicates that the lg（Q/K）-T curve of quartz is closest to saturation line,and the equilibrium temperature is 65~77 ℃.This temperature is within the reservoir temperature（65~82 ℃） calculated by quartz geothermometer.
出处
《湖南师范大学自然科学学报》
CAS
北大核心
2011年第5期86-91,共6页
Journal of Natural Science of Hunan Normal University
基金
国家自然科学基金资助项目(41072192)
重庆市科委院士专项基金资助项目(CSTC2010BC7004)
中央高校基本科研业务费专项资金资助项目(XDJK2010B006)
西南大学研究生科技创新基金资助项目(ky2010002)
关键词
地下热水
资源特征
温塘峡背斜
重庆市
thermal water
reservoir temperature
wentang valley anticline
Chongqing
