Abstract

NELA TOMEZZOLI, Renata. Chilenia and Patagonia, the same continent adrift?. Rev. Asoc. Geol. Argent. [online]. 2012, vol.69, n.2, pp.222-239. ISSN 0004-4822.

The study area is located along the southwestern margin of Gondwana, ranging from Sierra de la Ventana (Sierras Australes) to the San Rafael Block and the North Patagonian Massif. From the integration of data from feld work, paleomagnetic studies, anisotropy of magnetic susceptibility, and information obtained by other authors in this paper is concluded that the deformation in this part of Gondwana may have begun during the Middle Devonian and would relate to the collision of Patagonia from the south and Chilenia from the west. Since Chilenia and Patagonia have begun to collide with Gondwana at the same time raises the possibility that they were part of the same allochthonous drif terrain. Later in the Carboniferous, from the south collided the Deseado Massif. The post-collisional deformation associated with these processes would have continued until the Permian, producing latitudinal movements as part of the adjustment and coupling of the terrains and plate tectonics that formed the Triassic Pangea.

Keywords : Gondwana; Paleozoic; Paleogeography.

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