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根据理论模型对剩余异常进行直接推断解释的问题,在于选择模型的大小和密度差,以使它的重力效应尽可能地与剩余异常图形吻合.这基本上是一种实行曲线或曲面拟合的方法,然而,它绝不是一种简单的方法.由于即使用公式来描述最简单模型的位场都过于繁杂,因此,给任何一种直接拟合法都带来了困难.为了说明曲线直接拟合方法的困难,让我们来研究一个经常用来表示岩脉或矿脉的模型.一般认为,岩脉或矿脉是一种宽度远小于其长度的地质体,通常用薄板模型来表示这种地质体,其图形如图1所示.因为重力效应有可能比其他类型的位场观测结果对这种地质体的走向长度更为敏感,所
The problem of direct extrapolation of the residual anomaly based on the theoretical model lies in choosing the difference between the size and the density of the model so that its gravitational effect matches the residual anomalies as much as possible.This is basically a curve or surface fitting Method, however, is by no means an easy one, since any potential field that uses the formula to describe the simplest model is too complicated to give any kind of direct fit. To illustrate the direct fit of the curve Methodological difficulties, let us study a model often used to represent dikes or veins is generally believed that the dikes or veins is a width much less than the length of the geological body, usually used to represent the sheet of the geological body, The graph is shown in Figure 1. Because the gravitational effects may be more sensitive to the length of this geological body than other types of field observations,