高精度磁法和音频大地电磁测深法在红石泉铀成矿区的应用

Application of high-precision magnetic method and AMT in Hongshiquan uranium deposit area

通过分析研究红石泉铀矿区主要岩石的物性参数,总结了研究区的电、磁异常特征,发现不同地层和岩体存在明显电性、磁性差异。进而应用地面高精度磁法和音频大地电磁探测工作,获取了研究区的磁异常及地下电性资料,得出了测区磁异常信息和地下电阻率分布规律,增加了对研究区地球物理特征及区域深部构造空间分布情况的了解;结合含矿主岩与肉红色中粒花岗岩的伴生关系,推断了红石泉铀矿区隐伏伟晶状白岗岩体的深部延伸情况,揭示了深部铀成矿的可能性,为进一步铀矿勘查部署提供技术支撑。

By analyzing the physical parameters of the main rocks in Hongshiquan uranium deposit area,the characteristics of electrical and magnetic anomalies in the study area were summarized,and found that there were obvious differences in electrical and magnetic properties between different strata and rock masses.Furthermore,the magnetic anomaly and underground electrical property data of the study area were obtained by applying ground high-precision magnetic survey and audio-frequency magnetotelluric method.The magnetic anomaly information and the distribution law of underground resistivity were obtained,the understanding of the geophysical characteristics and the spatial distribution of deep structures in the study area was increased;Combined with the associated relationship between the ore-bearing host rock and the fleshy red medium-grained granite.The distribution range in the underground of the concealed pegmatoid alaskite was inferred,and the possibility of deep uranium mineralization was revealed,which provides technical support for further uranium exploration deployment.