Medium-high grade igneous-metamorphic basement unit in Central Patagonia, Argentina at its relation with the Terra Australis Orogen

RENDA, EMILIANO M.; GONZÁLEZ, PABLO D.; ORIOLO, SEBASTIÁN; MARCOS, PAULO; SUÁREZ, RODRIGO

Encuentro; Metamorphic Studies Group Meeting; 2021

During the Late Neoproterozoic to middle Paleozoic time span, the southwestern margin of Gondwana has been exposed to protracted subduction, which has been considered as part of the widespread Gondwanan Terra Australis Orogen (TAO). In southwestern Gondwana, the TAO comprises a series of accretionary systems which are associated with crustal extension and back-arc basin development. This tectonic setting alternates with sporadic contractional episodes related with increased plate coupling, accretion of oceanic material, or collision of allochthonous/para-autochthonous crustal blocks.