Glacier-related mass movements and their impact on the landscape: examples from the Chilean Central Andes

Abstract ID: 3.11265
| Withdrawn
| TBA
| TBA
Ugalde, F. (1)
Ugalde, R. (2, 3)
(1) University of Chile, Plaza Ercilla 803, 8320000 Santiago, CL
(2) Escuela de Geología, Facultad de Ciencias, Ingeniería y Tecnología, Universidad Mayor, Santiago, Chile
(3) PEDECIBA Geociencias, Universidad de la República, Montevideo, Uruguay
How to cite: Ugalde, F.; Ugalde, R.: Glacier-related mass movements and their impact on the landscape: examples from the Chilean Central Andes, International Mountain Conference 2025, Innsbruck, Sep 14 - 18 2025, #IMC25-3.11265, 2025.
Categories: Cryo- & Hydrosphere, Hazards, Remote Sensing
Keywords: Glacier, Rock glaciers, Glacier hazards, Andes, Chile
Categories: Cryo- & Hydrosphere, Hazards, Remote Sensing
Keywords: Glacier, Rock glaciers, Glacier hazards, Andes, Chile
Abstract

Glaciers are known, among their many features, for being great landscape sculptures. However, other phenomena derived from the glacial environment can also suddenly and intensely impact the landscape. Such is the case of glacier-related mass movements. These include rock and ice avalanches, glacier catastrophic detachments, glacier surging, glacial lake outburst floods and debris flows from active rock glaciers. Studying these phenomena becomes relevant for evaluating the recurrence of mass movements in cryospheric environments, understanding their causes, and estimating their magnitude in high mountain areas, especially in industry-settled locations such as the Central Andes. In that context, this contribution analyses five glacier-related mass movements in the last century in the central Andes of Chile (30°S-35°S), where these phenomena are still less known. We analysed the 1947 Juncal Sur glacier surge (33.10°S/70.11°W); a 1992 glacier advance that originated from a small valley glacier beneath the south face of Cerro Risopatrón (33.16°S/70.07°W), the 1980 catastrophic detachment of Aparejo Glacier (33.56°S/70.01°W), a potential pre-1970 glacier collapse of Tinguiririca 3 Glacier (34.78°S/70.31°W) and the 2024 debris flow originated from the CL105400105 rock glacier’s front (33.01°S/70.08°W). Based on field and remote-sensed evidence, we show the distinction between geomorphologic features of different glacier-related mass movements coexisting in a single location. We propose that large glacier hazards can overthrow the imprint of long-term glacier changes, acting as a higher controlling factor for landscape building.