重磁电综合物探在湖南某金矿勘查中的应用

Application of Gravity-magnetic-electric Integrated Geophysical Methods to the Reconnaissance of a Gold Mine in Hunan

为扩大金矿区及外围的找矿远景,寻找深部矿、隐伏矿,进行1∶10000高精度重力测量和磁法测量,圈出重磁异常,并在此基础上,开展可控源音频大地电磁法(CSAMT)剖面测量工作。通过对重、磁、电异常综合研究,并结合地质资料综合分析后,由已知到未知的原则,推断了6条断裂构造,圈定了3处隐伏、半隐伏岩脉,提出了今后找矿的方向和主要靶区。通过对比各方法的异常特征及分布规律,结合已知地质资料,对三种物探方法在本工作区解决地质问题的效果进行归纳总结,为今后的地质工作的部署及时提供了物探依据。

In order to expand the prospecting prospects for gold mines and surrounding areas,and to find deep mines and concealed mines,high-precision gravity measurement and magnetic survey of 1:10000 have been conducted to circle the gravity and magnetic anomalies.Meanwhile,CSAMT profile measurement work has been carried out.Studying on gravity,magnetic,and electrical anomalies and analysing geological data,this paper has deduced six fault structures,delineated three concealed as well as semi-concealed veins and proposed the main directions and target areas for ore prospecting in the future.By comparing the abnormal characteristics and distribution rules of each method and studying the obtained geological data,this paper summarizes the effects of the three geophysical methods in solving geological problems in the work area,which provides a geophysical basis for the deployment of geological work in the future.