| 五台山北麓断裂繁峙段晚第四纪活动性研究 |
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| 引用本文： | 赵仕亮,谭锡斌,于贵华,徐锡伟,石峰,孙鑫喆,高伟.五台山北麓断裂繁峙段晚第四纪活动性研究[J].震灾防御技术,2016,11(4):722-735. |
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| 作者姓名： | 赵仕亮 谭锡斌 于贵华 徐锡伟 石峰 孙鑫喆 高伟 |
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| 作者单位： | 中国地震局地质研究所，活动构造与火山重点实验室，北京 100029,中国地震局地质研究所，活动构造与火山重点实验室，北京 100029,中国地震局地质研究所，活动构造与火山重点实验室，北京 100029,中国地震局地质研究所，活动构造与火山重点实验室，北京 100029,中国地震局地质研究所，活动构造与火山重点实验室，北京 100029,中国地震局地质研究所，活动构造与火山重点实验室，北京 100029,中国地震局地质研究所，活动构造与火山重点实验室，北京 100029 |
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| 基金项目： | 国家自然科学基金项目（91214201）与中央级公益性科研院所基本科研业务专项项目（IGCEA1416）联合资助 |
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| 摘 要： | 五台山北麓断裂位于山西地堑系北部。本文以五台山北麓断裂繁峙段的地质地貌为研究对象,分别在繁峙县的大峪村和岗里村两地断裂沿线进行了无人机测量。利用三维结构的运动重建技术(Structure from Motion,SfM)进行影像数据处理,得到高精度点云数据,并通过进一步处理获得了分辨率达0.5m的高清断错地貌正射影像(DOM)和数字高程模型(DEM)。通过对典型地区的详细野外调查和挖掘探槽等手段对该段晚第四纪的活动性进行研究,发现断层晚第四纪以来的活动主要是以正倾滑运动为主。同时在五台山北麓断裂沿线的大峪村、岗里村等地进行了断错地貌分析和晚第四纪滑动速率计算,得到约20ka以来的断层垂向滑动速率为0.4—0.6mm/a,近18ka以来该段发生过至少两次古地震事件。古地震事件和滑动速率分析表明,五台山北麓断裂晚第四纪,尤其是全新世以来活动强烈,且不同段落存在明显的活动性差异。
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| 关 键 词： | 山西地堑系 五台山北麓断裂 晚第四纪活动性 滑动速率 正断层 |
| 收稿时间： | 2016/4/11 0:00:00 |
Late Quaternary Activity of the Fanshi Segment of the Northern Piedmont Fault of the Wutai Mountain |
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| Zhao Shiliang,Tan Xibin,Yu Guihu,Xu Xiwei,Shi Feng,Sun Xinzhe and Gao Wei.Late Quaternary Activity of the Fanshi Segment of the Northern Piedmont Fault of the Wutai Mountain[J].Technology for Earthquake Disaster Prevention,2016,11(4):722-735. |
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| Authors: | Zhao Shiliang Tan Xibin Yu Guihu Xu Xiwei Shi Feng Sun Xinzhe and Gao Wei |
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| Institution: | Institution of Geology, China Earthquake Administration, Key Laboratory of Active Tectonics and Volcano, Beijing 100029, China,Institution of Geology, China Earthquake Administration, Key Laboratory of Active Tectonics and Volcano, Beijing 100029, China,Institution of Geology, China Earthquake Administration, Key Laboratory of Active Tectonics and Volcano, Beijing 100029, China,Institution of Geology, China Earthquake Administration, Key Laboratory of Active Tectonics and Volcano, Beijing 100029, China,Institution of Geology, China Earthquake Administration, Key Laboratory of Active Tectonics and Volcano, Beijing 100029, China,Institution of Geology, China Earthquake Administration, Key Laboratory of Active Tectonics and Volcano, Beijing 100029, China and Institution of Geology, China Earthquake Administration, Key Laboratory of Active Tectonics and Volcano, Beijing 100029, China |
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| Abstract: | The northern piedmont fault of the Wutai mountain is located at the northern part of the Shanxi rift system. A test study was carried out in the Fanshi section of the northern piedmont fault of the Wutai mountain, with a small unmanned aerial vehicle. A group of high accuracy point cloud data was produced through the structure from motion technique, and then the orthographic images, DEM and fine 3-D model of fault landform with the resolution of 0.5m were generated after further processing. We analyze the landscapes and calculate the late Quaternary slip rates along the fault zone at the sites in Dayu village and Gangli village, respectively. The vertical slip rates are 0.4-0.6 mm/a during the last 20 ka, and at least 2 earthquakes occurred since about 18 ka. Associated with the analysis of paleo-earthquake events and slip rate, we found that the northern piedmont fault of the Wutai mountain is subject to intensive activity since late Quaternary, especially since Holocene. There exists obvious difference in faulting activity between different segments. |
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| Keywords: | Shanxi rift system The northern piedmont fault of the Wutai Mountain Late quaternary activity Slip rate Normal fault |
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