地壳形变分析中几个问题的讨论

在有关地壳形变分析的文献中,存在着一些值得商讨的问题。本文从理论上並通过实例回答了1)直接用观测值来估计变形参数还是用位移来估计;2)监测网的平差方法是否影响所估计的变形参数;3)现有的方法把位移场投影到断层线上来计算变形模型参数是否合理。

A Study of Some Problems Concerning the Analysis of Crustal Deformation Surveys

In the literature on the analysis of crustal deformation survey there exist some problems that need be clarified, Three of them are 1) Which approach is proposed for the estimation of deformation parameters, the "raw observation approach" or the "displacement approach" ? 2) Will unique solution for deformation parameters be obtained from the displacement vectors with respect to different datums ? 3) Is the present method justified, by which the displacement field of a free network is projected on a fault line to calculate the relative motions of the two sides of the fault? A11 these problems are surveyed in this paper. The mathematical model is first given of two epoch observations for crustal deformation analysis.Then, the paper makes some theoretical studies and provides numerical examples to answer the above questions.