| 唐山大地震的重复间隔 |
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| 引用本文： | 王挺梅,李建平.唐山大地震的重复间隔[J].地震地质,1984,6(3):77. |
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| 作者姓名： | 王挺梅 李建平 |
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| 作者单位： | 国家地震局地质研究所
(王挺梅)，国家地震局地质研究所(李建平) |
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| 摘 要： | 在1976年唐山地震形成的地面裂缝带上三个地段(市十中、市畜产公司牛马库和礼尚庄东)开挖了三个探槽,揭示出保存在晚更新世沉积物中的两次古地震遗迹。在唐山外围的地震地质调查中,也相应地发现了一次古地震形迹。文中通过对地裂缝和液化规模的类比分析,推测其烈度与1976年7.8级地震相近。古地震发生年代,经年~(14)C年代测定和沉积速率估算,分别发生于距今7665±105年和14865年。大震重复间隔近似值为7500年
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| 关 键 词： | 重复间隔 唐山地震 古地震遗迹 层位 唐山大地震 探槽剖面 地震裂缝 喷砂 地裂缝 古地震事件 |
THE RECURRENCE INTERVALS OF THE STRONG EARTHQUAKES IN TANGSHAN |
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| Abstract: | The traces of two paleo-seismological events, preserved in late Pleistocene sediments at a depth of 2m, were excaved by trenching technique at several sites along the surface fissure zone which was formed during 1976 Tangshan strong earthquake. The geological observation around the suberb of Tangshan city also found some similar evidences.By comparing and analysing surface fissure, seismic faults and liquification scale, seismic intensity for that event was estimated to more or less equal that for Tangshan quake.Based on the 14C dating and computation of sedimentory rate, two events may be estimated to have occurred 7665 + 105 years and 14865 years ago, respectively, suggesting a recurrence interval of about 7500 years for strong earthquakes in the study region |
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