| 四川则木河断裂带微断层地貌的地形测量和走滑速率的估算(英文) |
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| 引用本文： | 何宏林,宋方敏,李传友.四川则木河断裂带微断层地貌的地形测量和走滑速率的估算(英文)[J].地震地质,1999,21(4):361-369. |
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| 作者姓名： | 何宏林 宋方敏 李传友 |
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| 作者单位： | 1. 东京大学理学系,东京,113-0033
2. 中国地震局地质研究所,北京,100029 |
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| 基金项目： | This research was partly supported by the SASAKAWA Scientific Grant from the Japan Science Society;; |
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| 摘 要： | 则木河断裂带南北分别与安宁河断裂带和小江断裂带相接,自中更新世复活以来,以左旋走滑为主,并成为一条重要的地震断层。据TL和ESR 测年分析,则木河谷地广泛存在的最低一级冲积扇为10 000 ～15 000 年以来形成。切割这些冲积扇的冲沟被则木河断裂带错断,其发生时间与冲积扇相当或者更新,平均位移值测量为86m 。据此计算,则木河断裂带晚更新世以来的平均走滑速率为5-8 ～8-6m m/a
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| 关 键 词： | 断裂带 微断层地貌 地形测量 走滑速率 |
TOPOGRAPHIC SURVEY OF MICRO FAULTED LANDFORM AND ESTIMATION OF STRIKE SLIP RATE FOR THE ZEMUHE FAULT, SICHUAN PROVINCE |
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| He Honglin,SONG Fangmin,LI Chuanyou.TOPOGRAPHIC SURVEY OF MICRO FAULTED LANDFORM AND ESTIMATION OF STRIKE SLIP RATE FOR THE ZEMUHE FAULT, SICHUAN PROVINCE[J].Seismology and Geology,1999,21(4):361-369. |
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| Authors: | He Honglin SONG Fangmin LI Chuanyou |
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| Abstract: | Since the Zemuhe fault rejuvenated as the transition, fault between the Anninghe fault and the Xiaojiang fault about in the Middle Pleistocene, it was dominated by strong left lateral slip and became an important earthquake fault. The lowest alluvial fan tableland, which developed widespread in the Zemuhe valley, is estimated to be 10 000～15 000 years BP based on thermoluminescene and 14C dating results. Several faulted streams, which cut the surface of the lowest tableland and should be younger than or as old as the lowest tableland, are selected to be landform feature for determining the net tectonic displacement on the Zemuhe fault and were surveyed. The average displacement of these streams was measured to be 86m.Therefore, the average lateral slip rate of Zernuhe fault in the Late Pleistocene is calculated to be 5.8～8.6mm/a. |
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| Keywords: | Fracture Zone Micro faulted landform Topographicsurrey Strike-slip rate |
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