井中三分量磁测解释在钨钼多金属矿中的应用  

An Application of Three-component Magnetic Measurement Interpretation inBorehole in Tungsten-Molybdenum Polymetallic Ore

作　　者：王亚辉 陈娜 米慧慧 张愿飞 吴文涛 WANG Yahui;CEHN Na;MI Huihui;ZHANG Yuanfei;WU Wentao(Shaanxi Geology and Mining Geophysical and Geochemical Prospecting Team Co.,Ltd.,Xi’an,Shaanxi 710043,China)

机构地区：[1]陕西地矿物化探队有限公司,陕西西安710043

出　　处：《中国锰业》2024年第1期95-101,共7页China Manganese Industry

摘　　要：针对陕西省宁陕县杨泗庙-懒板凳钼钨矿某钻孔,利用井中三分量磁测判断磁性体的方位和空间位置,通过分析球体、厚板状体的磁场分布特征,总结了磁场分布特征与磁性体的方位、磁化方向之间的相互关系。结果表明:当钻孔位于矿体北、北东、北西时,垂直磁异常ΔZ曲线呈上负下正的“S”形,水平模差ΔH′曲线呈上正下负的反“S”形;当钻孔位于矿体南、南东、南西时,垂直磁异常ΔZ曲线呈上正下负的反“S”形,水平模差ΔH′曲线呈上负下正的“S”形;当钻孔位于矿体的东西侧时,垂直磁异常ΔZ曲线呈双“S”形,水平模差ΔH′曲线呈“C”形;当钻孔在矿体北侧,ΔT⊥收敛矢量正方向在南侧,指示矿头在钻孔南侧,当钻孔在矿体南侧,ΔT⊥收敛矢量正方向在北侧,指示矿头在钻孔北侧。该方法应用效果较好。Based on a drilling hole in Yangsimiao-Laobandeng Molybdenum Tungsten Mine in Ningshan Country of Shaanxi Province,the orientation and spatial position of the magnetic body were determined in using three component magnetic measurements in the well.By analyzing the magnetic field distribution characteristics of spherical and thick plate-like bodies,the relationship between the magnetic field distribution characteristics and the orientation and magnetization direction of the magnetic body was summarized.The results show that when the borehole is located in the north,northeast and northwest of the ore body,the vertical magnetic anomalyΔZ curve will present an S-shape with up negative and down positive and the horizontal mode differenceΔH′curve will present an S-shape with up positive and down negative.When the borehole is located in the south,southeast and southwest of the ore body,the vertical magnetic anomalyΔZ curve will present an inverse S-shape with positive upward and negative downward,and the horizontal mode differenceΔH′curve will present an S-shape with negative upward and positive downward.When the borehole is located on the east and west sides of the orebody,the vertical magnetic anomalyΔZ curve will present a double S-shape,and the horizontal mode differenceΔH′curve will present a C-shape.When the borehole is on the north side of the orebody,the positive direction ofΔT⊥convergence vector is on the south side,indicating that the ore head is on the south side of the borehole.When the borehole is on the south side of the orebody,the positive direction ofΔT⊥convergence vector is on the north side of the borehole.This method had a good application effect.

关 键 词：井中三分量 球体 厚板状体 杨泗庙-懒板凳 矿体 

分 类 号：P631.2[天文地球—地质矿产勘探]