放射性测量在佳木斯城区地下热水勘探中的应用

应用放射性土壤氡浓度测量、水中氡浓度测量以及土壤伽马能谱测量多种方法,对佳木斯城区50 km2的面积进行了探查,以确定地下热水的有利远景区。对于由多种放射性方法造成的多参数,采用了因子分析方法以降低参数量,组成互不干扰而地质意义明确的主成份分量f1、f2,继而对f1、f2进行趋势分析,提取了由构造断裂造成的的放射性元素富集的剩余异常,圈定出地下热储的空间位置。其结果与遥感解译的线性构造位置交汇处相吻合,证明了放射性测量方法的有效性,达到了对测区的初步勘探目标。

Application of Radiometric Measurement for Underground Thermal Water Detection in Jiamusi City

Making use of soil and water radon measurement and soil gamma ray spectrometric mea-surement,the exploration for favorable prospecting area of thermal underground water in Jiamusi urban area of 50 km2 was conducted.Factor analysis was employed to reduce the number of parameters deduced from multiple radiometric methods.The derived principal components f1,f2 are undependent with each other and of identified geological means.The trend analysis on f1 and f2 was conducted to extract the remainder anomalies which reflect the radioactivity elements enrichment formed by fracture structures and locate the spatial positions of thermal underground water.The results coincided well with the linear structure intersections interpreted by remote sensing,reflecting the effectiveness of radiome-tric measurements in underground thermal water exploration.