Considered as a significant mark on the evolution of the knowledge and development of global Plate Tectonics theory, the Paraná Basin records a long period of sedimentary accumulation with evidences of important climatic and bio-stratigraphic changes, remaining active almost during all Phanerozoic. Six megacycles of sedimentation are identified within the Paraná Basin: Rio Ivaí, Paraná, Gondwana I, II, III and Bauru. The possibility that some cycles of sedimentation were deposited on the influence of episodes of accretion of pre-Andean terrains, developed during the amalgamation of Gondwana supercontinent (Gondwanides Orogen), was suggested by some authors. This hypothesis has never been tested by geophysical modeling or others geological tools and taking advantage of that, this project intends to investigate this alternative through the isotopic study of detrital zircons. In this way, using also literature information, it will allow characterize when the Paraná Basin change from intracratonic sinéclise to a possible retroarc foreland basin setting or vice versa. Dating new ash fall layers will constrain with precision the stratigraphic levels according to the International Chronostratigraphic. Moreover, the U-Pb and Hf isotopic investigation in detrital zircons open an opportunity to understand and modeling the basement that can include information about composition e tectonics of important part of Rio de la Plata Craton and others pre-Gondwana cratonic blocks.
News published in Agência FAPESP Newsletter about the scholarship: