摘要
利用计算机和电子显微镜对华北北部地区主要断裂带的构造节理和断层泥的测量、统计和研究，仅得到２０％左右的构造节理是处在有利于现代构造应力场易于活动的方位上。这些构造节理基本上是在与断裂带形成有关的局部构造应力条件下形成。ＳＥＭ显微构造研究得到了这些断裂带最近一次活动的相对年代和它们曾经历过的运动方式。这些方法的运用，对于断层活动性的研究起到拓宽视野的作用，并可提供更多的证据。
Sructural joints and gouges of the main fault zones in Northern North China were determined,statistically studied and analysed on micro-computer and scanning electron microscopy（SEM）. On-ly twenty percents of the structural joints are oriented in the direction favorable to activation in the effect of the present stress field. Most of these structural joints were formed in the local stress field associated with the formation of the fault zones. The statistical study of rnicro-textures on the sur-face of quartz fragments from the fault gouges on SEM gives the last activity time of these fault zones, and the SEM determination of microstructures provides some information on the movernent mode along these fault zones. The results of these methods will provide more evidence for the fault activity.
出处
《地震地质》
EI
CSCD
北大核心
1994年第4期305-318,共14页
Seismology and Geology
关键词
断裂带
构造节理
显微构造
华北地区
: North China, Structural joint,Stress orientation ,Microstruc-ture,Fault activity time, Movement mode of fault
