广域电磁法在鄂东南铜绿山矿田深部矽卡岩型矿床中的找矿研究

鄂东南铜绿山矿田是典型的全隐伏矽卡岩型铜金矿床,随着勘探深度的增加,资源已接近枯竭,面对矿集区的强人文噪声干扰,传统的(音频)大地电磁方法无法获得高质量的数据,难以取得较好的勘探效果。本研究通过采用广域电磁法对铜绿山矿田进行勘探,发现该方法具有抗干扰能力强和勘探深度大等优点,获得了该地区深度为2 km以内的电阻率剖面,结合地质资料,推断圈定了2个深部有利成矿的接触带,通过钻探工程验证,广域电磁法具有较准确的勘探结果。为鄂东南矿集区边深部找矿工作提供了有效的技术方法支撑。

Study of wide field electromagnetic method applied in deep skarn type deposit in Tonglushan ore field, southeastern Hubei

The Tonglushan orefield in southeastern Hubei is a typical fully concealed skarn Cu-Au deposit. With the increase of exploration depth, the resources are nearly exhausted. In the face of strong human noise interference in the ore concentration area, the traditional (audio) magnetotelluric method can not obtain high quality data, and it is difficult to obtain good exploration results. This study by adopting wide-area electromagnetic method was carried out on the green mountain mineral field exploration, found that the method has the advantages of strong anti-interference ability and great exploration depth, the depth of the region within 2 km of resistivity profile, combined with the geological data, infer that selects the contact of two deep metallogenic belt, through drilling engineering validation, wide-area electromagnetic method has more accurate exploration results. It provides an effective technical method support for the prospecting work in the edge and deep of the ore.