Geodynamic Processes in the Andes of Central Chile and Argentina
This Special Publication arises from the UNESCO-sponsored IGCP 586-Y project ‘The tectonics and geomorphology of the Andes (32°–34°S): interplay between short-term and long-term processes’. It includes state-of-the-art reviews and original articles from a multidisciplinary perspective that investigate the complex interactions of tectonics and surface processes in the subduction-related orogen of the Andes of central Chile and Argentina (c. 27°–39°S). It aims to improve our understanding of tectonic and landscape evolution of the Andean range at different time scales, as well as the mutual relationship between internal and external mechanisms in Cenozoic deformation, mountain building, topographic evolution, basin development and mega-landslides occurrence across the flat slab to normal subduction segments. The geodynamic processes of the Andes of central Chile and Argentina are analysed from a number of subdisciplines of the Earth sciences, including tectonics, petrology, geophysics, geochemistry, structural geology, geomorphology, engineering geology, stratigraphy and sedimentology.
Megalandslides in the Andes of central Chile and Argentina (32°–34°S) and potential hazards
Published:January 01, 2015
Stella M. Moreiras, Sergio A. Sepúlveda, 2015. "Megalandslides in the Andes of central Chile and Argentina (32°–34°S) and potential hazards", Geodynamic Processes in the Andes of Central Chile and Argentina, S. A. Sepúlveda, L. B. Giambiagi, S. M. Moreiras, L. Pinto, M. Tunik, G. D. Hoke, M. Farías
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This review deals with an integration and update of the knowledge about large-volume landslides in the Central Andes at 32–34°S. An integrated landslide inventory for megalandslides in central Chilean and Argentinean Andean basins was developed, and dispersed chronological data on palaeolandslides were compiled, showing a dominance of Late Pleistocene and Holocene ages. Traditional hypotheses adopted for explaining landslide occurrence in the Central Andes are contrasted. Whereas seismic tremors have been widely suggested as the main triggering mechanism in Chilean collapses, palaeoclimatic conditions are considered as the main cause of Argentinean giant landslides. These different approaches denote the lack of...