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

The Minas-Bahia orogeny juxtaposed Archean crustal fragments and Paleoproterozoic magmatic arcs to form the São Francisco-Congo Paleocontinent by Rhyacian (ca. 2.05 Ga). Unravelling Minas segment of Orogenic Belt (MBO) is an important key understanding role in construction Columbia Supercontinent. Orosirian 1.9 Ga) final amalgamation was preceded a complex history accretion nuclei Proterozoic arcs. We present new whole-rock element geochemistry isotopic (Rb-Sr, Sm-Nd) data U-Pb ages for granitoid rocks main basement complexes located southern part Francisco cratonic tip, which displays varied degrees Neoproterozoic reworking related Brasiliano orogeny. Published Campo Belo Complex, Mineiro Piedade Block are combined with set propose integrated model tectonic evolution MBO. This evolutionary documents complete orogenic cycle, from subduction terrane collision, followed late-orogenic collapse. Subduction started diachronously between ca. 2.4 Ga 2.2 involving various that were later amalgamated during two collisional events at 2.10 Ga. oldest tonalite-trondhjemite-granodiorite (TTG) sanukitoid suites transition Neoarchean age block, belt Mantiqueira complex, apparently indicating diachronous onset plate processes different segments. petrogenesis, geochronology signatures these provide evidence towards periodicity associated supercontinent cycle throughout Earth history.