综合物化探方法在内蒙古某地区地热勘探中的应用

THE APPLICATION OF THE INTEGRATED GEOPHYSICAL AND GEOCHEMICAL METHODS TO THE GEOTHERMAL EXPLORATION IN A CERTAIN AREA OF INNER MONGOLIA

初步查明中水塘地区的地热异常范围,寻找地下储水导热构造。在地热预测区内,选择最佳的工作区首先进行水文地质调查。在此基础上进行地下6 m地温测定,浅层地震、电测深,静电α卡法、汞及砷土壤测量等,以了解热源的埋深,查明地热异常区内的断裂构造;确定温泉勘查施钻孔位,施钻勘探,查寻热源,打出热水。基于测区内地热严格受地质构造控制的认识,结合该区的水文地质条件,确定钻孔位置,打出了水温为38℃的地下低温热水。根据不同的水文地质条件,合理选择各项技术条件、科学的方法组合,是收到良好的效果的基本保证。

This study aimed at delineating the limits of geothermal anomaly in Shuitang area and searching for the underground aquifer and heat conduction structures. The most favorable working area within the geothermal prognostic region was chosen to make hydrogeological investigation. On such a basis, such means as geothermal measurement at the depth of 6 m, shallow seismic survey, electric sounding, static electricity αcard method, and Hg, As soil survey were carried out so as to detect the buried depth of the heat sources and the fault structures in the geothermal anomalous area and determine the positions of the drill holes for hot springs. In this way, the drilling can be arranged to look for the geothermal sources and reveal hot water. Based on the understanding that the geothermal resources in the study area are strictly controlled by geological structures, in combination with the hydrogeological conditions of this area, the authors determined the positions of the drill holes and eventually discovered underground low-temperature hot water （38 ℃ ）. The rational selection of various techniques and the scientific combination of different methods in the light of different hydrogeological conditions seem to be the prerequisites for obtaining good exploration results.