Tectonic evolution of the late Paleozoic basement in western Patagonia region (Argentina-Chile)

MARCOS, P; GONZÁLEZ, P.D; RENDA, E; ORIOLO, S; SUÁREZ, R; MARIA EUGENIA VARELA; GREGORI DANIEL,

Irlanda

Congreso; The annual Metamorphic Studies Group (MSG) Research; 2021

Patagonia constitutes a vast area located in the southern extreme of the South American Continent, where theigneous-metamorphic basement presents a complex evolution during the Paleozoic. The oldest outcrops are in thenortheastern region near the Atlantic Ocean and correspond to the Cambrian - Ordovician Orogens [1,2]. In contrast,its western region comprises basement units of Silurian ? Devonian ages, showing that orogen-development processesmigrated towards the southwest of Patagonia [3,4,5]. The last widespread igneous-metamorphic events record theLate Paleozoic Gondwanide Orogeny and are extensively distributed along the Patagonia's boundaries [2,6,7,8].