Effects of uplift on Carboniferous exhumation and mountain glaciations in pericratonic areas of SW Gondwana, central Argentina

DÁVILA FEDERICO M.; MARTINA FEDERICO; PARRA, MAURICIO; AVILA PILAR

TECTONICS

AMER GEOPHYSICAL UNION

Año: 2021

0278-7407

The late Paleozoic ice age (or LPIA) glaciations in Gondwana were the longest and mostwidespread in Phanerozoic history. Despite their paleobiogeographic significance for Earthevolution, their drivers are strongly debated. In this work, we used field observations (upperPaleozoic glaciogenic strata lapping onto Mississippian granites), low-temperature coolingages (apatite fission track), thermochronology modelling (apatite and zircon fission track, andapatite U-Th/He data) and landscape numerical simulations in a pericratonic scenario far awayfrom the late Paleozoic plate margin to demonstrate that exhumation, tectonic uplift andglaciations were coeval and genetically linked. Considering low temperatures alone cannotdrive a glaciation, we propose that this uplift and mountain building were key controls to traphumid air masses within the interior foreland of SW Gondwana