地面磁测与磁测井技术在安徽庐江小包庄铁矿勘探中的应用  

Application of ground magnetic and magnetic logging technology in exploration of Xiaobaozhuang iron deposit in Lujiang County, Anhui Province

作　　者：许强平 Xu Qiangping(No.327 Geology Team,Bureau of Geology and Mineral Resources of Anhui Province,Hefei 230011,Anhui,China)

机构地区：[1]安徽省地质矿产勘查局327地质队

出　　处：《地质学刊》2019年第3期434-441,共8页Journal of Geology

基　　金：安徽省地质勘查基金项目(2008-3-21)

摘　　要：安徽庐江小包庄铁矿是近年来发现的深部大型铁矿床,其主矿体位于已探明的大型铁矿罗河铁矿的正下方800~1 000 m处,是在“以矿找矿”思想指导下寻找深部矿产资源的一次重大突破。在罗河铁矿区域的原有地磁异常认识的基础上,运用小波多尺度分解技术处理高精度磁测数据,结果表明该区域的深部第二空间找矿潜力巨大。应用三分量磁测井技术对已有钻孔进行三分量的精细测量和磁异常的特征分析,在钻孔ZK2602深部发现弱磁异常。通过加深钻孔来勘查异常来源,在孔深1 377 m处见厚大的磁铁矿体。根据地面高精度磁测异常和已有钻孔测井分析矿体的延伸、走向、倾向布置钻探工程,见矿效果良好,确定小包庄铁矿的储量属大型矿床,是庐枞地区深部找矿的一次重大突破。The Xiaobaozhuang iron deposit in Lujiang,Anhui Province is a deep large-scale iron deposit discovered in recent years.Its main ore body is located at 800-1,000 m directly below the proven large iron ore mine,i.e.,Luohe iron deposit,which is a major breakthrough in the exploration of deep mineral resources under the idea of“prospecting by discovered deposits”.Based on the study of the original geomagnetic anomalies in the Luohe iron deposit,the high-precision magnetic measurement data was treated by wavelet multi-scale decomposition technology,and the results show that the potential of deep second space prospecting in the region is huge.The fine measurement of existing drilling and the characteristic analysis of magnetic anomalies were carried out by three-component magnetic logging technology,and weak magnetic anomalies were found at the depth of the Drilling Hole ZK2602.A large magnetite body was seen at a depth of 1,377 m by deepening the drilling to investigate the source of the anomaly.The high-precision magnetic anomaly on the ground and the existing borehole logging analysis were used to analyze the extension,direction and inclination of the ore body to arrange the drilling project,with good exploration results.The Xiaobaozhuang iron deposit is determined as a large scale reserve,which is a major breakthrough in the deep prospecting in Lujiang-Zongyang area.

关 键 词：小包庄铁矿床 磁测井 三分量磁异常 小波变换 安徽庐江 

分 类 号：P631.22[天文地球—地质矿产勘探]