Seismic study of the southernmost Andes in the SW Atlantic Ocean: Main wrench faults and associated basin.

TASSONE, A.; YAGUPSKY, D.L.; LODOLO, E.; MENICHETTI, M.; LIPPAI, H.

Barcelona, España

Simposio; 6th International Symposium on Andean Geodynamics; 2005

IRD Editions, Paris, Extended Abstracts, 722-725

Introduction The orientation of the main axis of the southernmost segment of the Andes, displays a change from N-S to almost E-W in the region of Tierra del Fuego and in its submerged continuity toward the E, in the region of the North Scotia Ridge to South Georgia Island. This change of orientation has been the object of diverse studies to obtain a model that could explain its formation and its relationship with the tectonic processes that have delineated of the boundaries of the current plates and the associated sedimentary basins. On the basis of interprect multichannel seismic of reflection profiles and their correlation with the geologic information that we have obtained and bibliographical data, we present novel results of the submerged sector of Tierra del Fuego, with a schematic synthesis of a segment of the fold-and-thrust-belt of the Fuegian Andes and a map of the marine bottom, with the distribution of the different geologic units and the main faults and associated basins.