【摘要】 昆仑山口西 8 1级地震造成 2 0余处崩塌体或崩塌带 ,主要分布在地震地表破裂带附近 ,以库赛湖以西为主。崩塌可分为基岩崩塌、土体崩塌、冰体崩塌、雪崩 4种类型。本文对崩塌的空间分布和发育特点进行了分析 ,通过与其它大地震相比 ,认为本次地震崩塌规模较小 ,除介质岩性、地形地貌、气候等因素外 ,地震动不十分强烈是崩塌规模偏小的重要原因。这种地表破裂带长而地震动偏弱的现象 ,是本次地震破裂的重要特点 ,可能与先存断裂的结构有关。更多还原

【Abstract】 Collapse occurred at more than 20 sites druing the western Kunlunshan Pass earthquake with M S 8 1.They were distributed nearby the earthquake surface rupture zone,mainly at the western Hongshui river outlet.Some characteristics of collapse were analyzed.By comparing with the other great earthquakes,we think that collapse of the earthquake is smaller in size.Beside lithologic,topographic and climate condition,less intensity of earthquake ground motion in this earthquake may be an important reason of the smaller size collapse.The phenomena of longer surface rupture but weaker ground motion is an important character of this earthquake.It may be related to specific structure of the seismogenic fault.更多还原