The Application of Integrated Geophysical Methods in Metal Ore Exploration

Simuku (EL2379)与Nakru (EL1043)项目区位于巴布亚新几内亚新不列颠岛西部地区，是世界最有前景的侵入相关矿床地区之一。随着研究区找矿工作逐渐深入，急需查明该地区的深部结构为深部找矿提供指引研究区域以其丰富的金、铜资源而闻名，地质环境复杂，具有斑岩、浅成低温和矽卡岩矿床特征。研究采用了激发极化法(IP)与电阻率测量结合的方法，结合历史航空电磁法(AEM)数据，对矿区进行了详细的地质调查和数据分析。研究结果表明，Simuku矿区的L03-04-05测线电阻率和激发极化响应显著，L04测线的激电异常集中在171050E，可能存在黄铁矿蚀变，具有较高的找矿前景。Nakru矿区的22200E-22260E，9339000N-9339400N处也存在充电率异常，值得进一步调查。综合物探方法在识别矿化带、验证历史异常和确定钻探目标方面表现出色，为金属矿勘查提供了有效的技术支持。The Simuku (EL2379) and Nakru (EL1043) project areas are situated in the western region of New Britain Island, Papua New Guinea, which is recognized as one of the world’s most prospective regions for intrusion-related mineral deposits. With the ongoing advancement of mineral exploration in the study area, there is an urgent need to delineate the deep-seated structures to guide further exploration efforts. The study area is renowned for its abundant gold and copper resources, characterized by a complex geological setting that includes porphyry, epithermal, and skarn-type mineralization. The study utilized a combination of induced polarization (IP) and resistivity surveys, integrated with historical airborne electromagnetic (AEM) data, to conduct comprehensive geological investigations and data interpretation. The results reveal that the L03-04-05 survey line in the Simuku area exhibits significant resistivity anomalies and strong IP responses. Specifically, the IP anomaly along the L04 line is concentrated at 171050E, indicating potential pyrite alteration zones and highlighting high exploration potential. In the Nakru area, a distinct chargeability anomaly was identified within the coordinates 22200E-22260E and 9339000N-9339400N, warranting further detailed investigation. The integrated geophysical approach has proven highly effective in identifying mineralized zones, validating historical geophysical anomalies, and defining precise drilling targets. This methodology provides robust technical support for metal ore exploration in the region.