CSAMT在广西浦北县新华矿区深部找矿中的应用研究

广西浦北县地处南岭成矿带边缘，具有丰富的矿产资源，随着找矿工作的日趋深入，浦北县新华矿区浅部的矿产资源几近开采殆尽，亟需寻找新的矿产资源赋存有利空间。由于矿区地质条件复杂、地形条件恶劣，且以断裂构造为主要控矿因素，为快速有效地探明矿区深边部的找矿有利空间，本研究采用了可控源音频大地电磁法（CSAMT），因其具有勘探深度大、抗干扰能力强、横向分辨率高等特点，能够较好地解决上述问题。通过开展CSAMT法有效查明了矿区内的主要电性层的分布和断裂构造的展布特征，及其往深部的延伸情况，推断了3条断裂构造，圈定6处深边部找矿有利靶区。结合地质、化探等研究工作成果，建立了浦北县地区老厂式脉状铅锌矿典型矿床的地质—地球物理—地球化学预测要素及综合找矿模型，研究成果可为该地区进一步的深部找矿预测研究工作提供物探依据和技术方法借鉴。

Application of CSAMT in deep prospecting in Xinhua mining area， Pubei County， Guangxi Province

Pubei County of Guangxi is located on the edge of Nanling metallogenic belt and is rich in mineral resources. With the deepening of prospecting work， the mineral resources in the shallow part of Xinhua mining area in Pubei County are almost exhausted， so it is urgent to find new favorable space for mineral resources occurrence. Due to the complex geological conditions and harsh terrain conditions of the mining area， and the fault structure as the main ore-controlling factor， in order to quickly and effectively explore the favorable prospecting space in the deep edge of the mining area， the controlled source audio magnetotellume method （CSAMT） is adopted in this study， which can better solve the above problems due to its characteristics of large exploration depth， strong anti-interference ability and high lateral resolution. By using CSAMT method， the distribution of the main electrical layers in the mining area and the distribution characteristics of fault structures and their extension to the depth were effectively identified. Three fault structures were inferred， and six favorable prospecting targets on the deep edge were delineated. Combined with the results of geological and geochemical exploration， the geological， geophysical and geochemical prediction factors and comprehensive prospecting model of typical ore deposits of Laochang type lead-zinc deposit in Pubei County are established. The research results can provide geophysical basis and technical reference for further deep prospecting and prediction research in this area.