摘要
利用岩石碎裂数目的分形理论，分析、计算了沂沐断裂带及其西侧北西向断裂的断层泥粒度成分的分维值，讨论了断层泥粒度成分分维的地震地质意义。研究结果表明，沂沐断裂带内的断裂活动强度大于北西向断裂活动强度；Ｆ２是沂沐断裂带中活动最强的一条断裂；断层泥粒度成分分维值可作为表征断裂活动时代、破裂形式和断层泥形成年代等的参量；分维值还与断层泥的母岩、厚度、粘土矿物含量和所处的断裂部位等相关。
In the paper, the fractal dimension of granulometric composition in the fault gouge from Yishu fault zone and northwest-trending faults on the western side of the zone are calculated and studied based on the fractal theory of rock fragmentation. We also discussed the seismological significance of fractal dimension of granulometric composition in the fault gouge. The results show that the activity of Yishu fault zone is larger than that of northwest-trending faults and the activity of Anqiu-Juxian fault is the largest in Yishu fault zone. The fractal dimension of fault gouge is a parameter describing the relative active age and rupture mode of the fault and forming age of the fault gouge. The fractal dimension value is also relative with parent rock, thickness, structural position and clay content of the fault gouge.
出处
《中国地震》
CSCD
北大核心
1996年第3期307-315,共9页
Earthquake Research in China
