构造叠加晕结合五方位测井在甘肃省贾公台金矿寻找深部矿体中的应用

贾公台金矿为甘肃党河南山地区规模最大的金矿床。为探索深部矿化、寻找盲矿体，在贾公台矿段开展原生晕研究，建立原生叠加晕轴向分带，发现贾公台金矿具反向分带特征。说明该矿体深部存在多期次成矿作用。结合地井五方位测井，预测深部3 200 m标高以下存在盲矿体。深部钻探发现了厚度大、品位高的多层金矿体，新增金资源量12吨，取得了显著找矿成果。构造叠加晕结合地井五方位测井成功圈定贾公台金矿深部矿体的实践，对同类矿床的深部找矿具有重要指导意义。

Application of Structural Superimposed Haloes Combined with 5-Direction Logging in Searching for Deep Ore Bodies in Jiagongtai Gold Mine, Gansu Province

Jiagongtai gold deposit is the largest gold deposit in Danghenanshan area of Gansu Province. In order to explore deep mineralization and search for blind ore bodies, primary halo research is conducted in the Jiagongtai ore block to establish axial zoning of primary superimposed halos and a reverse zoning characteristic has been found in the deposit. It indicates that there are multiple stages of mineralization in the deep part of the ore body. Combining with the surface-borehole 5-direction logging, it is predicted that there are blind ore bodies below the depth of 3 200 m and multi-layer gold deposits with large thickness and high grade have been found by deep drilling that increase gold reserves 12 tons. The remarkable prospecting result has been achieved. The successful practice of structural superimposed haloes combined with 5-direction logging in searching for deep ore bodies in Jiagongtai gold mine has great importance to deep prospecting of similar deposits.