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Remote sensing image interpretation and tectonic activity study of the active faults along the northeastern segment of the Longmenshan fault |
Xiaoping XIE1, Maowei BAI1( ), Zhicong CHEN1, Weibo LIU2, Shuna XI3 |
1.School of Geography and Tourism, Qufu Normal University, Rizhao 276826, China 2.Geochemical Exploration Party, Sichuan Bureau of Exploration and Development of Geology and Minerals Resources, Deyang 618000, China 3.Institute of Geological Relics, No. 137 Geological Party, Sichuan Coalfield Geological Bureau, Chengdu 610000, China |
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Abstract In this paper, the authors systematically summarized the remote sensing interpretation signs of active faults and, by using Landsat ETM+, ASTER GDEM and Google Earth image data in combination with previous research results, obtained the spatial distribution of active faults in the study area and analyzed in detail fault properties and activities. It is shown that Pingwu — Qingchuan fault, the northeastern segment of Beichuan — Yingxiu fault, Chaba — Linansi fault and Guangyuan — Jiangyou fault are roughly parallel in spatial distribution. On the basis of the measurement of offset streams dislocation, the contrast of exaggerated 3D landforms, the historical earthquakes analysis and the analysis of topographic relief extent of land surface, the authors have reached the conclusion that Pingwu — Qingchuan fault, the northeastern segment of Beichuan — Yingxiu fault, Chaba — Linansi fault and Guangyuan — Jiangyou fault are main active faults in the zone, which are all right-lateral strike-slip and thrust faults. Among them, the activity of the Pingwu — Qingchuan fault is strongest, the activity of the the northeastern segment of Beichuan — Yingxiu fault and Chaba — Linansi fault is weaker than that of Pingwu — Qingchuan fault, and the activity of the Guangyuan — Jiangyou fault is the weakest.
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Keywords
remote sensing interpretation
active fault zone
fault activity
the northeastern segment of the Longmenshan fault zone
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Corresponding Authors:
Maowei BAI
E-mail: 17863349965@163.com
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Issue Date: 14 March 2019
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