INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
capítulos de libros
Cenozoic orogenic evolution of the Southern Central Andes (32-36°S).
GIAMBIAGI, L.; MESCUA, J.; BECHIS F.; GREGORY H.; SURIANO J.; SPAGNOTTO S.; MOREIRAS S.M.; LOSSADA A.; MAZITELLI, M.; TOURAL R.; FOLGUERA, A.; MARDONEZ D.; PAGANO, D.S.
Growth of the Southern Andes
Año: 2015; p. 63 - 98
The Andes of central Chile and Argentina (32-36ºS), where a transition from flat slab to normal subduction can be recognized, is a particularly suitable setting to evaluate the interplay between constructive deep mechanisms building and uplifting a mountain chain and destructive ones that shape the landscape in a convergent active margin. The complex interactions of deeply seated and surface processes in the Andean subduction-related orogen represent the principal aim of this review. It has long been recognized that the topographic elevation and crustal thickness of this orogen have been mainly produced by crustal shortening due to the convergence of the Nazca and South American plates. Although interplate dynamics may control the overall pattern of tectonic shortening, this sector of the Andes shows a remarkable along-strike variation in the patterns of deformations, with an abrupt change in horizontal shortening and main topographic elevation, while the width of the orogen does not varies significantly. In this review, we analyze the controlling factors of these latitudinal changes, comparing different parameters, such as upper-plate lithospheric strength variations.