| 安宁河断裂带小相岭段古地震的新证据及最晚事件的年代 |
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| 引用本文： | 闻学泽,杜平山,龙德雄. 安宁河断裂带小相岭段古地震的新证据及最晚事件的年代[J]. 地震地质, 2000, 22(1): 1-8 |
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| 作者姓名： | 闻学泽 杜平山 龙德雄 |
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| 作者单位： | 四川省地震局,成都,610041 |
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| 基金项目： | 地震科学联合基金资助!(950 74 2 3) |
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| 摘 要： | 沿安宁河断裂带小相岭段发现了古地震的地表破裂遗迹。在两个场地开挖了横跨主断裂的探槽 ,以研究这里的晚全新世古地震。结果表明 ,在最近的大约 2 30 0a中 ,该断裂段至少发生过 4次伴有地表破裂的古地震事件 ,平均复发间隔为 6 0 0～ 70 0a。这里的最晚事件很可能发生在公元 15世纪 ,并且有可能发生在公元 14 80年。最晚事件沿地表断层产生了 3m的平均左旋位错 ,这相当于一次矩震级为 7 5± 0 3的走滑型大地震的同震平均位错量
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| 关 键 词： | 古地震 复发间隔 最晚事件 安宁河断裂带 |
NEW EVIDENCE OF PALEOEARTHQUAKES AND DATE OF THE LATEST EVENT ON THE XIAOXIANGLING MOUNTAIN SEGMENT OF THE ANNINGHE FAULT ZONE |
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| Wen Xueze,Du Pingshan,Long Dexiong. NEW EVIDENCE OF PALEOEARTHQUAKES AND DATE OF THE LATEST EVENT ON THE XIAOXIANGLING MOUNTAIN SEGMENT OF THE ANNINGHE FAULT ZONE[J]. Seismology and Geology, 2000, 22(1): 1-8 |
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| Authors: | Wen Xueze Du Pingshan Long Dexiong |
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| Abstract: | Surface rupture traces of several large paleoearthquakes are found along the Xiaoxiangling Mountain segment of the Anninghe fault zone. Trenches are excavated across the main fault at two sites to investigate later Holocene paleoearthquakes of this fault segment. The results show that at least 4 paleoseismic events with surface ruptures occurred on the fault segment during the last 2 300 years, suggesting an average recurrence interval of 600 to 700 years. Through carrying out the dendrochronologic calibr |
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| Keywords: | Paleoearthquake Recurrence interval Latest event Anninghe fault zone. |
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