Caracterización estructural de la Subcuenca Cacheuta-Tupungato del eje occidental del rift de la Cuenca Cuyana.

GIAMBIAGI, L.; MOREIRAS, S.M; GOMEZ, G.; STAHLSCHMIDT, E.; SPAGNOTTO, S.; MESCUA, J.

Congreso; IX Congreso de Exploración y Desarrollo de Hidrocarburos; 2014

This paper characterizes the 3D Plio-Holocene deformation of the Andean foreland at the transitional segment between flat subduction (north of 33°S) and normal subduction (south of 34°S). It integrates surface and subsurface data together with kinematic analysis of the main Andean structures and kinematic/dynamic analysis of meso-scale shear planes collected at different measurement stations distributed along the transitional subduction zone. The Andean foreland between 33 and 34°S is characterized by two Plio-Holocene stress fields coexisting side by side: a northern compressional regime and a southern strike-slip one. Our model highlighs the outstanding correlation between the morphology of the subducted slab, the spatial shift from compressive to strike-slip tectonic regime, and the southward disappear of the Precordillera.