武宁汤里温泉控矿构造及地温场特征分析

Analysis of the ore-controlling structures and geothermal characterestics of Wuning hot spring

武宁汤里发育温泉。为了查清该区温泉的控矿因素和地热特征,进行了物探、钻探等勘查和系统的水温测试工作。结果表明武宁汤里地热主要受构造控制,由区域性断裂F1和导水构造F2及阻水构造F3共同影响。地温场平面呈椭圆形,长轴方向与断层走向一致,测温显示平面温度最高处沿断裂带分布;地温垂向变化随着孔深增加,井内温度逐渐增高,钻孔揭露断裂时,温度明显增加,水温与导热裂隙构造成正比,即揭露构造部位越多,水温越高,最高达75℃。上述研究为合理开发该区地热田提供科学依据。

In order to find out the controlling factors and the geothermal characteristics of the hot springs in Wuning,geophysical prospecting,drilling exploration and systematically testing of the water temperature have been made.The results show that the Wuning hot springs are mainly controlled by tectonics,formed by regional fault F1 and conductivity fault F2 and block water structure F3 together.The geothermal like an oval in plane,with long axis consistent with the trend of the fault plane.Temperature measurement displays that the highest temperature distribution is along the fracture zone：borehole temperature of the geothermal gradually increased in vertical,the temperature of the water is proportional to thermal conductivity fracture structure,that is to say,the more tectonics exposed to outside,the higher the temperature of the water will be,even up to 75 ℃.The results above will provide scientific basis for the rational exploitation of geothermal fields.