| 河北宣化盆地南缘断裂的古地震遗迹 |
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| 引用本文： | 冉勇康,王景钵,等.河北宣化盆地南缘断裂的古地震遗迹[J].地震地质,1995,17(1):44-46. |
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| 作者姓名： | 冉勇康 王景钵 |
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| 作者单位： | 国家地震局地质研究所，北京100029 |
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| 摘 要： | 通过开挖，在宣化盆地南缘断裂上揭露出３次古地震事件，发生的年代分别距今约８．５４、７．０８和５．３１ｋａ，平均重复间隔１６１５±３６０ａ。事件位移量分别为０．５５～０．７４ｍ、０．５２～０．７ｍ和１．６３～２．２ｍ。但距今５．３１ｋａ以来断裂未发生过断错地表的运动，意味着其古地震重复不是简单的准周期型
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| 关 键 词： | 古地震 活断层 宜化－怀守盆地 |
PALAEOEAKTHQUAKE TRACES ALONG THE SOUTHERN BOUNDARY FAULT OF XUANHUA BASIN|HEBEI PROVENCE |
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| Abstract: | Excavation of trenches revealed three palaeoseismic events along the southern boundary fault of Xianhuabasin. They occurred in 8．54 ka，7．08 ka，and 5． 31 ka B.P.，respectivly，The average reccurence interval is1615±360a. The displacement of three events are 0．55～0．74m，0．52～0．7m and 1．63～2．2m，respectivly.However，the event displacing the surface has not occurred since 5．31 ka B.P.，suggesting that reccurrence in-terval of palaeoearthquakes is not simply quasi-periodic |
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| Keywords: | Paleoearthquake Active fault Xuanhua-Huai＇an basin |
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