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

RENDA, EMILIANO M.; MARCOS, PAULO; ORIOLO, SEBASTIÁN; GONZÁLEZ, PABLO D.; 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 [1,2,3,4], which has been considered as part of the widespread Gondwanan Terra Australis Orogen (TAO) [2]. In southwestern Gondwana, the TAO comprises a series of accretionary systems which are associated with crustal extension and back-arc basin development [2]. 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 [1,2,3,4].