建水地区主要断裂断层泥中石英碎砾表面SEM特征及其断裂活动

SURFACE SEM FEATURE OF QUARTZ GRAIL IN FAULT GOUGE IN JIANSHUI REGION AND ITS FAULT ACTIVITY

本文通过小江断裂带与石屏建水断裂交汇地４条主要断裂的现场考查及其断层泥中石英碎砾表面ＳＥＭ特征的分析研究表明：中更新世区内存在有一个较明显的构造活动平静期；全新世以来石屏—建水断裂仍明显强烈活动，李浩寨—甸尾断裂虽有活动但不强烈；黑依小水箐断裂和李浩寨—利民断裂，全新世以来基本不活动。

hrough site investigation in the crossing position cut by four faults in Xiaojiang fault zone and Shiping-Jianshui zone, the surface SEM feature of quartz grail in fault gouge is analyzed. The results show that there exists a clear tectonically quiescent period in the region of Pleistocene epoch; there appeared an obvious strong activity in Shiping-Jianshui fault zone since Holocene epoch; although there is activity in Lihaozhai-Weidian fault, not so strong; basically there have been no activity in Heiyi - Xiaoshuiqing fault and Lihaozhai - Limin fault since Holocene epoch.