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| 则木河断裂带大箐梁子附近古地震组合探槽研究 | |
| 引用本文： | 田勤俭,任治坤,张军龙.则木河断裂带大箐梁子附近古地震组合探槽研究[J].地震地质,2008,30(2):400-411. |
| 作者姓名： | 田勤俭 任治坤 张军龙 |
| 作者单位： | 1. 中国地震灾害防御中心,北京,100029;中国地震局地震预测研究所,北京,100036 2. 中国地震局地震预测研究所,北京,100036 3. 中国地震局地震预测研究所,北京,100036;中国地震局地质研究所,北京,100029 |
| 基金项目： | 国家重点基础研究发展计划(973计划) |
| 摘 要： | 古地震事件定年具不确定性,为了增加地震事件定年的可信度,文中通过断层活动方式、沉积环境和地震微地貌的综合分析来研究则木河断裂带上的古地震事件。在大箐梁子附近开挖组合探槽,揭露了3次古地震事件,分别距今约160a、3100a和5500～8900a,复发间隔为3000a左右;讨论了与走滑断层型地震相关的沉积过程,揭示了走滑断层在山坡部位形成鼓包和反向陡坎情况下的沉积模式 |
| 关 键 词： | 古地震 组合探槽 地震微地貌 则木河 沉积模式 |
| 收稿时间： | 2008-06-20 |
STUDY OF PALEOEARTHQUAKES BY COMBINED TRENCH ON ZEMUHE FAULT AROUND DAQINGLIANGZI,XICHANG,SICHUAN |
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| TIAN Qin-jian,REN Zhi-kun,ZHANG Jun-long.STUDY OF PALEOEARTHQUAKES BY COMBINED TRENCH ON ZEMUHE FAULT AROUND DAQINGLIANGZI,XICHANG,SICHUAN[J].Seismology and Geology,2008,30(2):400-411. | |
| Authors: | TIAN Qin-jian REN Zhi-kun ZHANG Jun-long |
| Abstract: | There exist some uncertainties in dating paleoearthquakes.To improve the credibility of determination of the earthquakes,comprehensive analysis of movement patterns,sedimentary environment and micro-topography has been made to investigate the paleoseismic events along the Zemuhe active fault zone.Combined trenches were excavated near Daqingliangzi,which reveal three palaeoearthquakes with ages of 160a,3100a and 5500～8900a,respectively,and a recurrence interva1of about 3000 years.Sedimentary processes relate |
| Keywords: | palaeoearthquake combined trench micro-topography Zemuhe River sedimentary model |
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