Petrography, geochemistry and geochronology of the potassic granitoids of the Rio Itacambiruçu Supersuite: implications for the Meso- to Neoarchean evolution of the Itacambira-Monte Azul block

Abstract

In the Itacambira-Monte Azul block (BIMA) the Archean rocks are represented by tonalite-trondhjemite-granodiorite (TTGs) of the

Evidence for a complex accretionary history preceding the amalgamation of Columbia: The Rhyacian Minas-Bahia Orogen, southern São Francisco Paleocontinent, Brazil

“…The northern portion of the São Francisco Paleocontinent comprises a number of tectonostratigraphic terranes that were diachronously amalgamated during the Minas-Bahia Orogeny (MBO): the Archean Gavião and Jequié blocks; the Paleoproterozoic Itabuna-Salvador-Curaçá Belt, characterized by both recycled and juvenile crustal additions; and the mainly juvenile Paleoproterozoic Buerarema Complex (Bersan et al, 2018;Aguilar et al, 2017;Barbosa & Barbosa, 2017;Cruz et al, 2016;Silva et al, 2016;Barbosa & Sabaté, 2004;Silva et al, 2002;Brito Neves et al, 1999;Oliveira et al, 2010) (Figure 1b).…”