2015-03-172015-03-172013-08KLEIN, Evandro Luiz; MOURA, Candido Augusto Veloso. Síntese geológica e geocronológica do Cráton São Luís e do Cinturão Gurupi na região do Rio Gurupi (NE-Pará / NW-Maranhão). Geologia USP. Série Científica, São Paulo, v. 3, n. 1, p. 97-112, ago. 2013. Disponível em: <http://ppegeo.igc.usp.br/pdf/guspsc/v3/08.pdf>. Acesso em: 16 mar. 2015. <http://dx.doi.org/10.5327/S1519-874X2003000100008>.1519-874Xhttps://repositorio.ufpa.br/handle/2011/6438The Gurupi region in northern Brazil has been divided into Paleoproterozoic (São Luís Craton) and Neoproterozoic (Gurupi Belt) geochronological domains based on Rb-Sr and K-Ar. Recent zircon (Pb evaporation) dating of most of the lithostratigraphic and lithodemic units, in addition to limited whole-rock Sm-Nd determinations, shows virtually all rock units (juvenile or reworked) formed between ~2.0 Ga and 2.2 Ga. A single granitoid shows a Neoproterozoic crystallization age (~0,55 Ga), and the Archean has been recorded only in inherited zircons and in protolith Sm-Nd model ages. The compositional, metamorphic, structural, geophysical and geochronological characteristics of the geological units supports the previous subdivision into two domains. However, they also reveal a common Paleoproterozoic evolution of both the Gurupi and São Luís domains. The Gurupi domain is characterized as a collisional orogen, whereas the São Luís domain shows accretionary characteristics, with both participating in the widespread Paleoproterozoic collage at 2.2 - 2.0 Ga. During the Neoproterozoic, the southern border of this region was affected by strong strike-slip shearing and very limited lithogenesis, reflecting the Brasiliano orogenic collage elsewhere and defining the presently observed relationship between the São Luís Craton and the Gurupi Belt.porAcesso AbertoGeocronologiaLitoestratigrafiaPaleoproterozóicoCráton São LuísCinturão GurupiPará - EstadoMaranhão - EstadoAmazônia brasileiraArtigo de Periódico