阿尔金断裂东北段敦煌阳关断裂晚第四纪活动性及其强震危险性影响分析

邵延秀; 邹小波; 袁道阳; 姚赟胜; 刘兴旺

doi:10.3799/dqkx.2020.082

Volume 46 Issue 2

Feb. 2021

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Article Navigation > Earth Science > 2021 > 46(2): 683-696

Shao Yanxiu, Zou Xiaobo, Yuan Daoyang, Yao Yunsheng, Liu Xingwang, 2021. Late Quaternary Slip along Yangguan Fault at Northeastern Section of Altyn Tagh Fault and Implications for Seismic Risk. Earth Science, 46(2): 683-696. doi: 10.3799/dqkx.2020.082

Citation:

Shao Yanxiu, Zou Xiaobo, Yuan Daoyang, Yao Yunsheng, Liu Xingwang, 2021. Late Quaternary Slip along Yangguan Fault at Northeastern Section of Altyn Tagh Fault and Implications for Seismic Risk. Earth Science, 46(2): 683-696. doi: 10.3799/dqkx.2020.082

Citation:

Shao Yanxiu, Zou Xiaobo, Yuan Daoyang, Yao Yunsheng, Liu Xingwang, 2021. Late Quaternary Slip along Yangguan Fault at Northeastern Section of Altyn Tagh Fault and Implications for Seismic Risk. Earth Science, 46(2): 683-696. doi: 10.3799/dqkx.2020.082

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Late Quaternary Slip along Yangguan Fault at Northeastern Section of Altyn Tagh Fault and Implications for Seismic Risk

doi: 10.3799/dqkx.2020.082

Shao Yanxiu^{1, 2
,
,},
Zou Xiaobo¹,
Yuan Daoyang³,
Yao Yunsheng^{1, 2},
Liu Xingwang^{1, 2}

1.
Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China
2.
Lanzhou National Geophysical Observatory, Lanzhou 730000, China
3.
School of Earth Sciences, Lanzhou University, Lanzhou 730000, China

Received Date: 2020-03-18
Publish Date: 2021-02-15

Abstract

Abstract

The Yangguan Fault is located on northwestern section of the Altyn Tagh Fault, which is a large strike slip fault and seismotectonic in Northeast Tibet Plateau, which poses potential seismic hazard to city development and culture relics in Dunhuang area. In this study it focuses on characterizing activity of the Yangguan Fault, using high resolution satellite imagery to map faults in space. At two study sites, it made detailed investigation by methods of difference GPS, aerial photogrammetry with unmanned aerial vehicle, paleoseismical trench and Optically Stimulated Luminescence dating. The preliminary results are that the Yangguan Fault is a thrust fault trending NEE with high dipping angle; its latest event likely occurred between 43.5 ka and 12.1 ka. The results imply that the eastern section of the Yangguan Fault ruptured at least during Late Pleistocene. It is proposed that the eastern section rupture will cause an earthquake of M_w 6.6, shaking the nearby area strongly, and the seismic intensity in the Dunhuang downtown will be more than Ⅵ, reaching up to Ⅸ at Yangguan relic site. Therefore, the Yangguan Fault is an important seismic fault in West Hexi Corridor. This study provides critical data for seismic prevention and disaster mitigation for city development and culture relic protection in Dunhuang area.
- Altyn Tagh Fault,
- Yangguan Fault,
- paleoseismology,
- Dunhuang,
- seismic prevention and disaster mitigation,
- seismology

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致谢: 感谢“国家高分辨率对地观测系统甘肃数据与应用中心”为本文提供影像数据.感谢两位审稿专家为本文提出了宝贵的修改意见.

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