Abstract: In this paper, fractal structure features of granulometric composition in fault gouge are stud-ied based on fractal theory. The result shows that fractal dimension of fault gouge changes from 2to 3,and its average value is about 2.8.Fractal dimension is a parameter describing the granu-lometic composition of fault gouge. The largger the fractal dimension value,the higher, the de-gree of self-organization. The evolution of fault gouge is in a higher stage. The author discusses the relationship between fractal dimension,indexes of physical mechanical property of fault gougeand features of fault motion.

Key words: Fault gouge, Fractal, Faulting

摘要： 用分形理论分析了断层泥粒度成分的分形结构特征,其分维在2～3之间,平均值为2.8左右。分维可作为定量描述断层泥粒度成分的参数,分维值高的断层泥,自组织程度高,其形成演化处于高级阶段。探讨了断层泥的分维及其物理力学性质指标和断层运动特征的关系。

关键词: 断层泥, 分数维, 断层活动