海原断裂带西段断层泥的分形研究

FRACTAL RESEARCH OF FAULT GOUGES ALONG THE WESTERN SEGMENT OF HAIYUAN FAULT BELT

利用光学和电子显微镜研究了海原断裂带西段断层泥的粒径分布，５微米至１厘米的粒径段，断层泥具有自相似特征，断层面的粘滑摩擦的特征位移参数可由分维上限（约１厘米）确定。同时用分形理论分析了断层泥粒度成分重量百分比的分形结构特征。

Using optical and electronic microscope, the grain size distribution of fault gouges taken from the western segment of Haiyuan fault belt is studied in this paper. The gouges with range from 5 μm to 1 cm are self-similar. Characteristic displacement parameter of stick-slip friction can be determined by the upper fractal limit (ablut 1 cm). Fractal structures of granulometric composition of gouges (weight percentage) are studied based on fractal theory. The relationship between fractal dimension of gouges and features of fault movement is also discussed in this paper.