高精度磁测在沉积型磁铁矿区的找矿效果  

The Application of Ground High-Precision Magnetic Measurement to Sedimentary Type Iron Ore in Guangxi

作　　者：余越星[1,2] 罗润林[1] 张艳国[1,3] 高柱[1] 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]浙江省有色金属地质勘查局,浙江绍兴312000 [3]天津市地球物理勘探中心,天津300181

出　　处：《工程地球物理学报》2013年第1期7-10,共4页Chinese Journal of Engineering Geophysics

基　　金：广西科技基础条件平台(重点实验室)建设项目(编号:11-031-20)资助

摘　　要：沉积型磁铁矿脉特点是矿脉宽度小,品位低,综合磁性不均匀。通过对已知矿体进行剖面测量,证明高精度磁测的有效性,对野外实测数据进行日变校正、正常场校正、高度校正、水平梯度校正,化极、向上延拓、求取垂向二阶导数,以及对实测磁异常剖面进行人机对话反演等处理获得良好的效果。本次高精度磁测工作查明了矿区内磁铁矿(化)体的空间分布范围及大致埋深情况,圈定了几个有价值的磁铁矿(化)体靶区,取得了良好的找矿效果。The sedimentary magnetite vein characteristics are small in width, low in grade, and weak in magnetic property. To prove the effectiveness of high--precision magnetic measurement we survey the known orebody profile, after diurnal variation correction, nor- mal field correction, height correction, latitude correction to the pole, upward continuation and vertical second derivative, and man--machine interaction inversionof the magnetic field measured data anomaly profile which obtainsa good effecthe. The task of the high--preci- sion magnetic measurement located the space distribution of magnetite ore body mineralization and burial depth in the mining area and delineated several valuable magnetite mineralization body target, which achieves a good prospecting effect.

关 键 词：高精度磁测 沉积型磁铁矿 磁异常 

分 类 号：P631.4[天文地球—地质矿产勘探]