提高重力资料解释精度的褶切法

地球物理场在某些方面具有相似的特征，在一定条件下它们之间是可以相互转换的。因此可以借助地震资料数字处理中的褶积法和磁法资料解释中的切线法对重力资料进行处理和解释。具体做法是：设计不同参数地质体的重力异常一次导数作为子波，与重力观测值作褶积运算，用褶积结果的极值确定异常体的位置，用切线法求出异常体埋藏深度。试算分析表明：当子波的参数与地质体的参数一致时，褶积曲线具有较高的信噪比，所求地质体深度精度较高。但总的来说，子波的几何参数及密度变化对所求埋藏深度影响不大。

Convolution-tangent method for improving the interpretation accurary of gravimetric data

Geophysical fields have similar properties in some ways, and they can be converted each other under certain conditions. Therefore, both the convolution method for, seismic data processing and the tangent method for magnetic data interpretation can be used in the processing and interpretation of gravimetric data. The procedure is as follows: 1. the first derivatives of gravity anomalies of geological bodies designed with different parameters are used as wavelets;2. convolute each wavelet with the gravity observations of a real geological body respectively；3. use the maximum pcak value of convolution reszzltu to locate the anomalous body；4. determine the depth of the anoynalous body by tangent method. The computation and analysis show that when wavelet parameters are consistent with that of geological body, the convolution curve has quite g god S/N ratio, and the calculated depth of geological body is rather accurate. Generally speaking, the geometric parameters of waveIet and the density of geological body cause Iess influence on the calculated depth.