摘要
东昆仑活动断裂带是青藏高原内部一条长度达到1000km以上的活动断裂带。在近100年期间,沿该断裂带曾发生过4次MS7.0以上地震。最新一次强震是2001年昆仑山口MS8.1地震。本文综合前人资料,通过东昆仑活动断裂带的几何展布、活动速率、历史强震及古地震地表破裂带展布,讨论了该断裂带的强震破裂分段特征、强震破裂端点障碍体的稳定性,强调了从断裂带演化过程认识断裂带的几何展布与现今强震地表破裂分段的异同,并讨论了该断裂带未来的强震破裂危险地段。
The East Kunlun active fault zone is an up to 1000 km long active fault zone in the interior of the Qinghai-Tibet Plateau. Four strong earthquakes of Ms≥ 7.0 have occurred along the fault zone during the past 100 years. The latest one was the Kunlun Mountain Pass earthquake of Ms = 8. 1 in 2001. The paper discusses the characteristics of segments of surface ruptures due to strong earthquakes along the fault zone and the stability or instability of the obstacles at the ends of the surface ruptures of strong earthquakes based on the geometric distribution, rates of activities and distribution of surface ruptures analysis of historical strong earthquakes and paleo-earthquakes along the fault zone and by an integrated of previous data. It is emphasized that the coincidence and difference between the geometrical distribution of the fault zone and present segmentation of the surface raptures should be understood from the process of evolution of the zone. In addition, the future dangerous segments of raptures due to strong earthquakes along the zone are discussed.
出处
《地质力学学报》
CSCD
2006年第2期132-139,共8页
Journal of Geomechanics
关键词
强震
地表破裂带
破裂分段
构造演化
东昆仑活动断裂带
strong earthquake
surface rupture zone
rapture segmentation
tectonic evolution
East Kunlun active fault zone
