【摘要】 主要对乌鲁木齐地区中小地震震源机制解及构造应力场进行分析。结果表明,乌鲁木齐地区中等地震震源断错性质主要以倾滑逆断层为主,地震破裂面与其附近构造走向基本一致,主压应力P轴方向为NE向或近NS向;乌鲁木齐地区小地震的震源断错性质表现出一定的区域性,破裂面以近EW向为主,主压应力P轴方向近NS向,兼有部分NE向或者NW向。显示出小地震的发生既受局部地质构造的影响,也受区域构造应力场的影响。更多还原

【Abstract】 The authors mainly analyzed the focal mechanism solution of small and moderate earthquakes and the structural stress field in Urumqi area.The result shows that the rupture characteristics of moderate earthquakes in Urumqi area were mainly the inverse faulting in natural.Their rupture planes are consistent with the structural strike.The direction of the main compressional stress P axis is NE or nearly NS.The rupture characteristics of small earthquakes in Urumqi area show a certain regional.Their rupture plane of is mainly near EW.The direction of the main compressional stress P is nearly NS.And also exists part NE or NW.It shows that the occurrence of small earthquakes is affected by both the local geotectonics and regional structural stress field.更多还原