一、前言利用面元法对已勘探地区作面积性的磁场正演计算,求算有无剩余异常,以了解有无较大的盲矿体存在是一个比较好的电算方法。我们用面元法计算了南沟南北两矿带磁铁矿体理论垂直磁异常,获得了较好的结果。回答了南沟富铁矿科研工作急需解决的问题。同时采用座标旋转法以矿体为薄板进行消磁计算,然后再进行正演计算的方法,步骤是合理的。由于正演 I. Preface It is a good method to calculate the area magnetic field forward in the explored area by the surface element method and calculate whether there is any residual anomaly in order to know if there is a large blind ore body. We calculated the vertical magnetic anomaly of the magnetite orebody in the north and south orebodies of Nan ditch using the face-element method and obtained good results. Answering the urgent need to solve the problem of scientific research work of NanGou rich iron ore. At the same time, coordinate rotation method is adopted to demagnetize the orebody into a thin plate, and then the forward calculation method and steps are reasonable. As forward