相山地区地面高精度磁测数据

A DATA PREPROCESSING METHOD OF GROUND HIGHACCURACY MAGNETIC SURVEY IN XIANGSHAN AREA

本文针对相山火山岩盆地的弱磁异常受地表磁性不均的强烈干扰形成磁场突变点多、幅值高的特点，提出了一种数据预处理方法──剖面三点插值切割法，能有效地剔除单个突变点，使磁异常曲线圆滑，并能保持异常特征，在实际应用中具有一定效果。

The Xiangshan volcanic basin is strongly interfered by weak magnetic anomalies and theinhomogeneity of surface magnetism,that is to say,the magnetic field is characterized by alarge amount and high value of points of discontinuity. In view of this feature,this paper haspurposed a more suitable preprocessing method─section three-point interpolation dessecting method. It can effectively reject individual point of discontinuity to smooth magneticanomaly curves and at the same time to maintain anomalous characteristics, and it hasachieved certain results in practical application.