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Keywords = Wudaoliang–Changshagongma fault

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16 pages, 40233 KiB  
Article
Holocene Activity of the Wudaoliang–Changshagongma Fault of the Eastern Tibetan Plateau
by Mingjian Liang, Yun Dong, Cheng Liao, Yulong Qin, Huiping Zhang, Weiwei Wu, Hong Zuo, Wenying Zhou, Changli Xiong, Li Yang, Yue Gong and Tian Li
Remote Sens. 2023, 15(9), 2458; https://doi.org/10.3390/rs15092458 - 7 May 2023
Cited by 2 | Viewed by 1991
Abstract
The Wudaoliang–Changshagongma fault is one of the NW-trending faults located within the southern Bayan Har Block of the Tibetan Plateau in China. In this paper, we used high-resolution imagery and digital elevation model data to study the geomorphological and geological characteristics of the [...] Read more.
The Wudaoliang–Changshagongma fault is one of the NW-trending faults located within the southern Bayan Har Block of the Tibetan Plateau in China. In this paper, we used high-resolution imagery and digital elevation model data to study the geomorphological and geological characteristics of the fault. Furthermore, the result also determined the fault trace and estimated the average horizontal slip rate of the fault since the late Quaternary to have been 2.6 ± 0.6 mm/a. This slip rate is approximately equivalent to that of the Awancang, Madoi–Garde, and Dari faults, which are also located within the block. Furthermore, the slip rates of these faults obtained by remote sensing and geological methods are consistent with GPS observations. It indicates that tectonic deformation within the block is continuous and diffuse. Using trenching study results and sedimentary radiocarbon dating, we identified four paleoearthquake events that occurred at 42,378–32,975, 33,935–20,663, 5052–4862, and after 673–628 cal BP, respectively. The recurrence intervals of large earthquakes on the faults within the block are much longer than those of the boundary faults, and the slip rates are also smaller, indicating that faults within the block play a regulatory role in the tectonic deformation of the Bayan Har Block. Full article
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