An overview of the Late Triassic–Pleistocene magmatism in the Golfo San Jorge Basin

Abstract

The Patagonian Late Triassic–Pleistocene magmatic history encompasses multipleintraplate and subduction–related events associated with diverse geodynamicsettings. Key episodes include the Late Triassic and Late Cretaceous–Paleoceneflat slabs, the Cenozoic subduction of two mid-ocean ridges, slab break-off andtearing events during the Jurassic, Cretaceous–Paleocene, and Late Miocene–Pleistocene, as well as the influence of the mantle transition zone from the latestEocene to the Middle Miocene. These processes collectively triggered significantmagmatic episodes across the region. This overview highlights the mainfeatures of these magmatic events, their associated geodynamic contexts, andthe proposed petrogenetic models, focusing on the central Patagonian region,including the Golfo San Jorge Basin and its surrounding areas.