综合物探方法在宁芜北段东带铁矿战略性勘查中的应用  

Application of integrated geophysical methods to iron ore strategic exploration in the east belt of northern Nanjing- Wuhu area

作　　者：陈雪[1] 孔德龙[1] 刘军[1] 丁海红[1] 苏昆[1] 

机构地区：[1]江苏省有色金属华东地质勘查局,江苏南京210007

出　　处：《地质学刊》2015年第4期657-664,共8页Journal of Geology

基　　金：国土资源部老矿山深部及外围找矿项目(1212011220681)

摘　　要：近几年,我国东部地质勘查重点逐步向寻找深部隐伏矿床目标转移,地质找矿的难度和投资风险加大。通过在宁芜北段东带高台寺预测区施工剖面性重磁工作,辅以可控源音频大地电磁测深,结合地质工作及重、磁、电、地联合正反演成果认识,推断高台寺预测区中部的低缓磁异常可能在深部对应有高密度高磁性体存在。经钻探验证,该磁性体主要由隐伏的闪长玢岩和不同程度的磁铁矿化共同引起,表明综合物探方法仍是寻找深部矿产较为科学合理的技术手段。In recent years, the focus of geological exploration in eastern China has gradually shifted to deep concealed deposits, and the geological prospecting thus has greater investment risk and difficulty. This work measured magnetic and gravity profiles with assisted Controlled-Source Audio-frequency MagnetoteUurics （CSAMT） in the Gaotaisi area of the east belt of northern Nangjing-Wuhu area. Combined with the geological work, and the knowledge of joint forward and inversion of gravity, magnetic, electrical and geological da- ta, it is inferred that the deep high-density and high-magnetic geological bodies may cause low and gentle magnetic anomalies in the middle Gaotaisi area. Drilling verification suggests that magnetic bodies in the study area mainly result from the concealed dioritic por- phyrite and varying degrees of magnetization. It is thus indicated that the integrated geophysical prospecting method is still a rational and scientific technology for exploring deep-seated ores.

关 键 词：铁矿 综合物探 高台寺 宁芜北段 

分 类 号：P631[天文地球—地质矿产勘探] P618.31[天文地球—地质学]