摘要
本文利用分维几何学方法对祁连山和龙首山断层进行了定量性研究。结果表明,分维数可以表征断层的不均匀性、不规则性和复杂性等,但是,与地震活动无明显的相关关系。分维数的大小与断层分枝数、断层迹线的展布面积有一定关系。
Fractal geometry is applied to the quantitative analysis of Qilian Mountain fault and Longshou Mountain fault. Using the circle area covering method, the fractal dimensions for every segment of Longshou Mountain. fault range from 1.308 to 1.434 with confidence 99%. Using ruler method, the D values of the total fault, west segment, median segment and east segment for the main fault trace of Qilian Mountain are respectively 1.0118, 1.0043, 1.0154 and 1.0075 with confidences 95—99%. And by means of circle area covering method, the D values are 1.518, 1.549, 1.537 and 1.460 respectively for the total fault and every segment of Qilian Mountain.The study results show that the fractal dimension D may express fault hetereogeneity, irregularity, complexity and so on. But according to the results, the correspondence between earthquake activity and fractal dimension is not Obtained. There is a slight correlation between the fractal dimension and the branch number and the occupied area of branches.
出处
《西北地震学报》
CSCD
1990年第3期23-32,共10页
Northwestern Seismological Journal
基金
地震科学联合基金
