Migrating Cretaceous-Eocene Magmatismin the Serra do Mar Alkaline Province,SE Brazil: Melts from the Deflected Trindade Mantle Plume?

Rift to post-rift evolution of a “passive” continental margin: the Ponta Grossa Arch, SE Brazil

“…The thermochronological ages around 90 Ma obtained in this study represent the exhumation and tectonic denudation of high elevated areas that evolved during the Late Cretaceous in response to the drifting of South America lithosphere plate over a thermal anomaly (Trindade hot spot- Thompson et al 1998;Ernst and Buchan 2001;Meisling et al 2001;Storey et al 2001;Tello Saenz et al 2003;Hackspacher et al 2004Hackspacher et al , 2007. The Trindade hot-spot activity might have also influenced the evolution not only in the northern part of the PGA but also north of the study area.…”

Soil texture and chemical characteristics along an elevation range in the coastal Atlantic Forest of Southeast Brazil

“…Their modern topography probably began to take shape in the Oligocene (Almeida, 1976) when graben formation west of the Serra do Mar accelerated. Neotectonic activity continues to the present, creating steep slopes upon which landslides commonly expose unweathered bedrock (Furian, 2002;Riccomini and Assumpção, 1999;Thompson et al, 1998).…”

Combined 40Ar/39Ar and (U–Th)/He geochronological constraints on long-term landscape evolution of the Second Paraná Plateau and its ruiniform surface features, Paraná, Brazil

“…Thermochronological modelling has revealed a history of continuous denudation after a significant pulse of post-rift uplift (Gallagher et al, 1995;Cogné et al, 2011) and alkaline and peralkaline magmatism (Thompson et al, 1998;Riccomini et al, 2005;Gomes et al, 2011;Velázquez et al, 2011) between~90 and 60 Ma. The regional cooling event, probably driven by denudation, that followed the uplift and magmatic pulses is recorded by the influx of siliciclastic sediments delivered to the Santos Basin (Moreira et al, 2007).…”