Pre-Andean deformation in the southern Central Andes (32°-33°S)

GIAMBIAGI, L. B.; MESCUA, J. F.; FOLGUERA, A.; MARTÍNEZ, A.

Niza

Simposio; Seventh International Symposium on Andean Geodynamics (ISAG08); 2008

Institut de Recherche pour le Développement (IRD) y University of Nice - Sophia Antipolis

The present day structure of the Andes between 32° and 33°S, is characterized by different N-S trending morphostructural units which are, from west to east (Fig. 1): Cordillera Principal, Cordillera Frontal and Precordillera. The Precordillera forms a north-south trending mountain chain composed of thick metamorphic and sedimentary sequences of Cambrian to Neogene age. This paper presents a detailed investigation of the structure and evolution of the southern Precordillera, focusing on the probable geometry of the Pre-Andean structures and their control on the subsequent Cenozoic Andean deformation.