一、前言我们应用了布哈塔恰雅(Bhat tacha ryya)提出的曲面延拓方法,并作了介绍。在介绍中,用“偶层位”对方法的原理作了补充说明。经试用后认为,该方法在理论上是比较完善的。不受“弱地形”条件的限制,而且计算结果的精度也是比较满意的。不少野外队的同志曾希望我们给出在起伏地形剖面上的延拓方法。这是因为很多实际的地质体可视为二度体,再则是因为曲面延拓方法耗用计算机时间长,不可 I. Preface We apply and introduce the method of surface extension proposed by Bhat Tachayya. In the introduction, with “even layer” on the principle of the method made a supplementary explanation. After the trial that the method is relatively perfect in theory. Not limited by the conditions of “weak terrain”, and the accuracy of calculation results is also satisfactory. Many field team comrades had hoped us to give a continuation of the topography of the relief terrain. This is because many of the actual geological body can be considered as a second body, and then because the surface extension method consumes a computer for a long time, not