The activity, segmentation, and evolution characteristics of large-scale landslides along the Anninghe active fault zone, Southwest China

The Anninghe fault zone located at the eastern margin of the Tibetan Plateau plays a significant role in affecting the evolution and distribution characteristics of geological disasters along the fault zone and in adjacent areas. In this paper, geological field surveys, remote sensing image interpre...

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Bibliographic Details
Published in:Bulletin of engineering geology and the environment 2022-08, Vol.81 (8), Article 311
Main Authors: Zhou, Hongfu, Ye, Fei, Fu, Wenxi, Wei, Yuting, Qin, Yadong, Tang, Wenqing, Fang, Tian
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Foundations
Geoecology/Natural Processes
Geoengineering
Geotechnical Engineering & Applied Earth Sciences
Hydraulics
Nature Conservation
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Summary:The Anninghe fault zone located at the eastern margin of the Tibetan Plateau plays a significant role in affecting the evolution and distribution characteristics of geological disasters along the fault zone and in adjacent areas. In this paper, geological field surveys, remote sensing image interpretation, high-precision GPS monitoring, scanning electron microscopy (SEM) tests of fault gouges, and radon tests of fault zones were used to analyze the distribution characteristics, activity modes, and activity of the Anninghe fault zone. The Anninghe fault zone is divided into three sections, i.e., northern, middle, and southern sections. The middle section is further divided into three secondary sections. The results show that the present-day activity of the middle section is the strongest, followed by that of the northern section and then that of the southern section. Four types of fault-controlled modes of the large-scale landslides can be summarized, i.e., the landslide-entirety fault-controlled type (LEFT), landslide-crown fault-controlled type (LCFT), landslide-side fault-controlled type (LSFT), and landslide-toe fault-controlled type (LTFT). A strong positive correlation exists between the present-day activity of the Anninghe fault zone and the distribution density of large-scale landslides, and the more active a fault zone section is, the higher the density of large-scale landslides is.
ISSN:1435-9529
1435-9537
DOI:10.1007/s10064-022-02804-x