Abstract
On 12 July 2018, the giant Jiangdingya ancient landslide reactivated and blocked the Bailongjiang River in Nanyu Town, Gansu Province, China. The ancient landslide was ca. 4.1~4.9 × 107 m3, and the 2018 reactivated landslide was ca. 4.8~5.5 × 106 m3, with the characteristics of a deep-seated retrogressive landslide. The terrain and geological structure of the landslide area are very complicated with alpine valleys and high gradient rivers, and the ancient landslide had maturely developed. The Pingding-Huama fault, which has been active since the late Quaternary, passed through the landslide region. Because of the active fault and tectonic uplift, the lithology is deeply fragmented. Based on the remote sensing interpretation and field investigation, development characteristics and reactivation mechanism of the Jiangdingya ancient landslide are described.
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Acknowledgments
The authors are grateful to the anonymous reviewers and editors for providing useful comments and suggestions. The authors would like to thank Prof. Chengxuan Tan, Prof. Zhiheng Li, and Prof. Yuliang Cheng for their discussions on the landslide formation mechanism. Postgraduate students Yaqi Shen and Jian Liu participated in the field investigation and laboratory tests.
Funding
This study was supported by the National Natural Science Foundation of China (41731287, 41877279) and the China Geological Survey Project (DD20160271).
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Guo, C., Zhang, Y., Li, X. et al. Reactivation of giant Jiangdingya ancient landslide in Zhouqu County, Gansu Province, China. Landslides 17, 179–190 (2020). https://doi.org/10.1007/s10346-019-01266-9
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DOI: https://doi.org/10.1007/s10346-019-01266-9