摘要
本文以非粘土断层泥带宽度与断层错距在断层(带)发育中期线性相关的实验结果为依据,对滇西北地区断层破碎带宽度(W)与断层错距(D)的关系作了统计分析,目的在于建立一种从断层破碎带几何特征反演断层背景位移的新方法。通过对该区中等发育程度的33条断层48组样本的统计,得到相关性较好的D=18.5W的经验关系式,同时还就这一关系式的适用范围及影响因素进行了分析讨论。应用D—W关系,确定了直线型的剑川断裂中北段的背景位移分布,并提出断层的背景位移分布可作为断层分段的一个重要指标。
Based on the experimental results of linear correlation between width of non-clay gouge and dislocation distance during the mid-period of fault development, the authors have made statistic analyses about relations between width of crack belt(W) and dislocation distance(D) of faults in north-west of Yunnan, whtch aimed at establishing a new method inversing fault backgroung displacement from geometrical feature of crack belt. A fairly good experience correlation D=18.5W has been gained from 48 samples among 33 faults which are mid-developed in their located regions. Meanwhile, application range of above correlation and its impact factors have also been discussed in this paper. The application of W-C correlation to the north-mid segment of linear Jian-chuan fault has determined background displacement distribution, it has been put forward that background displacement distribution can be taken as a vital indicator for fault segment-dividing.
出处
《地震研究》
CSCD
北大核心
1993年第4期384-390,共7页
Journal of Seismological Research
关键词
断断破碎带
断层错距
断层位移
Width of fault crack belt
Distance of fault dislocation
Fault displacement
