三度体磁异常的不定积分变换法研究

A Study on Applying Indefinite Integral Transformation to the Interpretation of Three-Dimensional Magnetic Abnormality

为发现和圈定干扰覆盖下的不明显异常,作者从三度磁性体的磁异常公式出发,推导磁异常的不定积分变换结果并由参量图方程绘得不定积分变换的磁异常参量图。本文针对2种规则形态磁性体推导其特征点规律,并进而用不同的方法求取磁性体的深度和磁性参数。在不同的空间几何参数条件下,讨论不定积分变换后参量图的曲线变化规律并总结其异常特征,提取判断产状的要素。该方法能简单有效地发现一些重要的地质信息,所得到的空间参数与变换异常间的特征点关系将有助于磁异常的分析。

From the formulation of two kinds of three-dimensional abnormal magnetism, we deduce the result of indefinite integral transformation and draw a parameter plots by the parameter equation. This paper finds out the regulation of a series of characteristic points and obtains parameters with different methods toward the two kinds of magnetism. Under different geometrical conditions,we discuss the change of the parameter plots and the characteristics of abnormality. Furthermore, we extract the main factors of a body's shape by using this method. Using this approach can obtain some important geologic information and will benefit practical interpretation.