关键词: 地质体建模, 最短对角线法, 可视化, 位场模拟, 重磁正演

Abstract: According to the potential forwarding of gravity and magnetic，a modeling method to build 3D geological body，which is based on sections of geological body，is proposed.The method constructs the surface of geological body using an improved shortest diagonal algorithm，which can find initial point correctly and overcome the shortage of classic short diagonal algorithm，simultaneity，can build geological body surface using sections having different quantity of points.Composing mentioned method with potential field simulation can make the data structure of visualization accordant with that of computation and improve the precision of computation，so the proposed method is effective and validate.

Key words: geological body modeling, shortest diagonal algorithm, visualization, potential field simulation, gravity-magnetic forwarding