【摘要】 在地质地貌调查基础上 ,对灵武断裂进行了古地震槽探揭露。结果显示 ,距今 2 8ka以来 ,灵武断裂上发生过 5期地表破裂型地震事件 ,时间大约分别在距今 ( 2 7 15± 0 778) ,2 0 0 ,( 13 0 7± 0 0 6) ,( 10 586± 0 0 5)和 6 0ka。根据 5期古地震事件的综合对比分析 ,发现断裂有分段组合破裂的特征 ,由此并结合槽探揭示的古地震同震位移等估计了古地震的震级。更多还原

【Abstract】 Based on geological and geomorphic investigation, the paleoearthquake events along the Lingwu faults have been revealed by digging trenches. The results show that there are five faulting events along the Lingwu faults since 28ka B.P. and they happened in about (27.15±0.778)ka、20.0ka,(13.07±0.06)ka,(10.586±0.05)ka and 6.0ka B.P., respectively. According to synthetic comparison and analyses on the five paleoearthquakes events,it is suggested that the fault has the segmented and combined rupture features. And we have estimated their magnitudes by combining the rupture lengths and the coseismic displacement revealed by the trenches.更多还原