井中三分量磁法测量在深部找矿中的应用——以金岭铁矿区磁异常解析为例  

Application of three-component magnetic survey method in drill for deep ore exploration:A case study of magnetic anomalies in the Jinling iron mining area

作　　者：李令斌 LI Lingbin(Shandong Zhengyuan Geological Resources Survey Co.,Ltd.,Jinan 255000,China)

机构地区：[1]山东正元地质资源勘查有限责任公司,济南255000

出　　处：《有色金属（矿山部分）》2021年第1期86-91,共6页NONFERROUS METALS(Mining Section）

摘　　要：基于地面高精度磁法测量难以解决危机矿山深部找矿突破的问题,以井中三分量磁法测量为研究对象,结合王旺庄、侯家庄和南龙磁异常,分析了井中三分量磁法测量在深部找矿中的应用效果。研究结果表明,根据井中三分量磁法测量结果,当矿体在观测孔以北时,ΔZ曲线呈反“S”型,当D大时,正值小于负值;若D很大时则呈似“C”型曲线;当D减小,正异常逐渐增加,而零值点伴随“D”的增大相应有所抬高;当矿体在观测孔以南时,ΔZ曲线呈正“S”型,其特点与反“S”型相反;钻孔验证结果显示,在王旺庄CK8、CK9分别见到65.69 m、58.47 m的磁铁矿体,在侯家庄11A-4钻孔和南龙0-2孔中见到了预测磁铁矿体,找矿实践证明,井中三分量磁法测量在深部找矿中具有良好的应用效果。The ground high-precision magnetic survey is difficult for deep ore exploration in exhausting mines.In this paper,aiming to understand the application effect of three-component magnetic survey method in drill for deep prospecting,combining with the Wangwangzhuang,Houjiazhuang and Manlong magnetic anomalies,the three-component magnetic survey method in drill was investigated.The results indicated that when orebodies were located in north of the observation holes,ΔZ curve occurred as a reverse“S”type.In addition,when D values was elevated,the positive value was less than the negative value.In contrast,if D values are very high,a C-shaped curve arose.When D values decreased,the positive anomalies gradually increased,but the zero value point increased with the increase of“D”.When the orebodies were located in the south of the observation holes,ΔZ curve occurred as a positive“S”type,and its characteristics were opposite to the inverse“S”type.The results of drilling verification showed that magnetic orebodies in deep 65.69 m and 58.47 m were discovered in CK8 and CK9 in the Wangwangzhuang deposit.Moreover,in the Houjiazhuang and Nanlong deposits,magnetic orebodies were also discovered in 11A-4 drill and 0-2 drill,respectively.The ore prospecting practice proposed that the three-component magnetic survey method in drill has a good application effect in the deep ore exploration.

关 键 词：危机矿山 深部找矿 金岭铁矿 井中三分量磁法测量 磁异常 

分 类 号：P62[天文地球—地质矿产勘探]