摘要
偶极装置的电磁耦合小,是幅频激电的常用装置。偶极拟断面的信息丰富,有利于提高推断水平。然而因研究不够,影响它的效能的发挥。为了解决这个问题,我们对偶极异常的特点、规律和推断方法进行了系统的研究。本文所介绍的便是所取得的基础性成果:在水平地形条件下,单原拟断而的图源对应规律。在描述和定义拟断面图形特征的基础上,给出了线源二度条件下的一组低阻源的图源局部特征间的对应规律和一组一般的图源总体特征间的对应规律。前者包括上、小、下特征点和上、中特征线间的对应规律,后者包括鞍峰规律、谷部分布规体,均衡u值的变化规律,正文规律和对称性对应规律。最后用模型实验及数值计算结果证明上述规律也适用于点源三度条件。
Abstract
The dipole device has small electromagnetic coupling, and is a common device for amplitude-frequency induced polarization. Dipole quasi-cross section contains abundant information, and is therefore beneficial to raising inference level. Nevertheless, the insufficient research has affected giving full play to its role. For the purpose of solving this problem, we have made a systematic study on characteristics, laws and inference method of dipole anomalies. The basic results obtained are reported ill this paper, i. c. , the graph-source cor responding law of single-source quasi-cross section under the condition of horizontal topography.
On the basis of describing and defining graphic characteristics of quasi-cross section, this paper gives the corresponding law between graph-source local characteristics of a set of low-tesistance sources under the condition of two-dimensional linear source and the corresponding law between the overall characteristics of a set of common graphs-sources. The former includes the corresponding law between upper, middle, lower characteristic points and up per, middle characteristic lines, whereas the latter includes saddle-peak law, valley distribution law, variation law of isostatic value, orthogonal law and symmetry corresponding law. .Finally, using model experimentation and mime rical calculation, the paper proves that the above laws arc also suitable for three-dimensional point source condition.
出处
《物探与化探》
CAS
CSCD
1989年第3期199-207,共9页
Geophysical and Geochemical Exploration
