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我们知道,在磁法勘探中,由磁性体的磁场强度的垂直分量Z的曲线的特征不能区分磁性体是否垂向叠加。本文将论述,将Z进行付里埃变换,在频率域中,在一定的条件下,由磁性体的功率谱等曲线的不同特征,可以区分引起磁异常的场源是否叠加。我们通过一些模型来阐述这个问题。对二度体以厚板为模型,对三度体以圆柱体为模型进行讨论。只考虑完全垂向叠加的情形,基本垂向叠加的可作为完全垂向叠加看待;垂向叠加很少时,由Z曲线的特征可看出有垂向叠加或并列的磁性体的存在,这里不加讨论。 本文设磁性体为均匀磁化来讨论问题。
We know that in magnetic surveying, the characteristics of the curve of the vertical component Z of the magnetic field strength of a magnetic body can not distinguish whether or not the magnetic body is superposed vertically. In this paper, we discuss how to convert Z to Fourier transform. In the frequency domain, under certain conditions, different characteristics of the curve of the power spectrum of the magnetic body can be used to distinguish whether the magnetic field causing the magnetic anomaly is superimposed. We use some models to illustrate this problem. For the second body to plate as a model, the third body to cylinder model for discussion. Considering the case of complete vertical stacking, the basic vertical stacking can be regarded as complete vertical stacking. When the vertical stacking is small, the vertical stacking or juxtaposition of magnetic bodies can be seen from the characteristics of the Z curve Without discussion. In this paper, the magnetic body is uniformly magnetized to discuss the problem.