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本文从勘探地球物理的实际需要和特点出发,探讨了重磁位场解析延拓的数学提法,给出一套较为实用的数值解法。所论述的原理、方法适用于三维空间任意起伏地形条件下的重磁位场曲化平计算,可做“上延拓”计算,也可做“下延拓”计算。在一个比较复杂的理论模型上所做的方法检验表明“上延”和“下延”都取得了较好的效果。
In this paper, starting from the actual needs and characteristics of exploration geophysics, this paper discusses the mathematic method of analytic extension of gravity and magnetic potential field, and presents a set of practical numerical solution method. The principle and method discussed in this paper are suitable for the calculation of the field curvature level of gravity and magnetic field under arbitrary undulating terrain in the three-dimensional space, which can be calculated as “upward extension” or “downward continuation extension”. The methodological tests done on a more complex theoretical model show that both “up-delay” and “down-delay” have achieved good results.