The metamorphic architecture of the transpressional Gondwanide Orogen in southern South America: Insights from P-T-D-t paths

ORIOLO, SEBASTIÁN; GONZÁLEZ, PABLO D.; SCHULZ, BERNHARD; GIACOSA, RAÚL; RENDA, EMILIANO M.; MARCOS, PAULO; SUÁREZ, RODRIGO; BALLIVIÁN JUSTINIANO, CARLOS; CHRISTIANSEN, RODOLFO; YOYA, MARÍA BELÉN; RESTELLI, FLORENCIA B.; BASEI, MIGUEL A.S.

Cambridge

Encuentro; Metamorphic Studies Group Meeting; 2021

The Gondwanide Orogeny represents a major late Palaeozoic tectonometamorphic event along southern Gondwana, roughly coeval with the Variscan collision recorded along the northern Gondwana margin. In South America it is nearly ubiquitous along the proto-Pacific margin, being intimately associated with protracted subduction. Most relics of the Gondwanide Orogen were upper crustal rocks, but lower to middle crustal remnants are well-exposed in Patagonia (Argentina & Chile). Since robust P-T-D-t constraints are still scarce for the region, the aim of this contribution is to present a regional evaluation of integrated structural, petrological and petrochronological data, in order to evaluate the spatial and temporal evolution at the orogen scale.