Rock Avalanches in the Tibetan Plateau of China

作者：Yufeng Wang, Qiangong Cheng, Qiwen Lin, Anwen Shi, Jie Ming, Zhiyi Feng, Zhang Song · 发表于：Progress in landslide research and technology · 年份：2023 · DOI：10.1007/978-3-031-44296-4_2 · 被引用次数：6 · 研究领域：Landslides and related hazards、Cryospheric studies and observations、Geology and Paleoclimatology Research

Abstract China is a country with high mountainous areas widely distributed, which is characterized by high reliefs, intensive tectonic activity, fragile ecological environments, etc. Under such particular background, rock avalanches, as one of the most threatening geological disasters in the high mountainous regions, have drawn much scientific interest because of their sudden occurrence, huge volumes (>10 6 m 3 ), high velocities (>20 m/s), and extremely low Fahrböschung (typically 0.1 to 0.3) with destructive disasters caused. Focusing on the Tibetan Plateau of China, spatial distribution of rock avalanches in its certain area was conducted, hoping to provide insights into the controlling factors of rock avalanches’ formation. Furthermore, several typical rock avalanches were investigated in detail based on remote sensing analysis, mapping of fixed wing unmanned aerial vehicle and detailed field investigations. It is reached that toreva blocks, transverse and longitudinal ridges, ridges separated by conjugate troughs, and hummocks are common and widely distributed surficial landforms in rock avalanche deposits, which usually display in a clear sequential distribution. In the cross-section, a series of internal sedimentary structures, including jigsaw structures, inner shear zones, diapiric structures, convoluted laminations, faults, etc., were identified. Based on these detailed geological features, the possible emplacement processes and mechanisms are discussed to pro...