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在金属矿区域物探中,航磁图是广泛应用的一种物探资料。本文提出了金属矿区大比例尺航磁图的数字处理方法技术,包括分离区域场和局部场的最小均方误差滤波器、位场转换的组合、区域磁异常的反演、局部异常的统计分类,并以南京-铜陵地区的1:25000的航磁资料为例,说明了方法的应用及所能解决的岩体分布、地质构造的划分、找矿远景区的予测等地质问题。在附录中给出了部分方法的计算机程序。本期刊登的是方法的应用部分,并在附录中给出了DJS-6机二维频率滤波程序。
Geophysical prospecting in the metal mine area, aeromagnetic map is a widely used geophysical data. This paper presents the digital processing method of large-scale aeromagnetic map in metal mines, including the minimum mean square error filter separating the regional field and the local field, the combination of the field-field transition, the inversion of regional magnetic anomalies, the statistical classification of local anomalies, Taking the 1: 25000 aeromagnetic data in Nanjing - Tongling area as an example, the geological problems such as the application of the method, the distribution of the rock mass to be solved, the division of the geological structure and the prediction of the prospecting prospect area are illustrated. Some methods of computer programs are given in the appendix. This issue of the method is part of the application, and given in the appendix DJS-6 machine two-dimensional frequency filter.