| 长江三峡狮子口地区断层最新活动年龄及工程评价 |
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| 引用本文： | 李兴唐,袁登维.长江三峡狮子口地区断层最新活动年龄及工程评价[J].地震地质,1991,13(1):78-86. |
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| 作者姓名： | 李兴唐 袁登维 |
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| 作者单位： | 中国科学院地质研究所，水利部长江水利委员会勘测总队，水利部长江水利委员会勘测总队 北京 100029，武汉 430010，武汉 430010 |
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| 摘 要： | 经野外调查和验证,长江三峡狮子口地区的NNW向遥感线性形迹是地形、岩性和小型断层的反映。对区内断层带样品进行的同位素年龄测定,判定出青林口断层在距今49×r04a曾有轻微活动,其余的四条断层第四纪(240×104a)以来无活动。地貌、地质和微震(M<3)分布表明,这些断层现代是不活动的,非控震构造,对三峡水库、大坝工程稳定性无影响
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| 关 键 词： | 长江三峡 狮子口地区 断层最新活动 工程活动断裂 |
DATING AND ENGINEERING EVALUATION OF RECENT FAULT ACTIVITY IN SHIZHIKOU AREA OF THE THREE GORGES SECTION OF CHANGJIANG RIVER |
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| Li Xing-tang.DATING AND ENGINEERING EVALUATION OF RECENT FAULT ACTIVITY IN SHIZHIKOU AREA OF THE THREE GORGES SECTION OF CHANGJIANG RIVER[J].Seismology and Geology,1991,13(1):78-86. |
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| Authors: | Li Xing-tang |
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| Abstract: | The NNW-trending linear traces in the Shizhikou area of the Three Gorges section of Changjiang River reflect the relief, lithologic features and small-scale faults. It is inferred from geologic and geomorphic data and result of isotopic dating that the Qinglin-kou fault was slightly activated in 49×104a B. P. The Jufang fault was not activated since 50×104a, and other three small faults were not been also activated since 50×104a, even in the Quaternary period. The geologic and geomorphic data and distribution of earthquake epicenters indicate that the NNW-trending faults in the studied area have not been active in recent time, and not the seismogenic and earthquake-generating faults either which would not have an influnce on the stability of the Three Gorge reservoir and its dam |
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| Keywords: | Three Gorges on Changjiang River Sizhikou area Recent fault activity Enginering-active fault |
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