Chronology from rifting to foreland basin in the Paganzo Basin (Argentina), and a reapprisal on the ?Eo- and Neohercynian? tectonics along Western Gondwana

ASTINI, R.A.; MARTINA, F.; EZPELETA M.; DÁVILA, F. M.; CAWOOD P.A.

Santiago

Congreso; XII Congreso Geológico Chileno; 2009

Sociedad Geológica de Chile

Analysis of the Paganzo Basin (Argentina), incorporating new isotopic and provenance data, provides the basis for an integrated model of the evolution of the southern Central Andes from Early Carboniferous rifting (ca. 360-325 Ma) to commencement of the late Permian Choiyoi granite-rhyolite silicic magmatic province. The rifting that initiated the Paganzo Basin postdates convergent margin docking of the Chilenia terrane during the Early-Mid Devonian (ca. 385 Ma) [1,2] and was followed by renewal of subduction at approximately 325 Ma [3] resulting in inversion to a retroforeland basin, located within the present Argentine foreland.