Rhyacian magmatic arc rocks with sanukitoid geochemical signature from the Juiz de Fora Complex, Minas-Bahia Orogenic System (SE-Brazil)

Sanukitoid rocks make up a complete magmatic series with distinct geochemical characteristics of TTG suites and granitoids from modern arcs are regarded as markers the transition typically Archean geodynamics to plate tectonics. Although most known sanukitoid formed during Neoarchean Mesoarchean, numerous papers have characterized Paleoproterozoic arc granitoid showing affinity series. This work presents new data field, lithogeochemistry, zircon U-Pb geochronology, Sm-Nd Sr isotopic studies on granodioritic granulites signatures Juiz de Fora Complex (JFC), one tectonic components Minas-Bahia Orogenic System (MBOS), southern São Francisco Paleocontinent (southeastern Brazil). These crystallized at ~2175 Ma present values εNdt between −4.0 +0.5, TDM 2.57 2.12 Ga, 87Sr/86Sri 0.6937 0.7137. We interpret these result crystallization magmas hybrid mantle source extensively contaminated by crustal material protracted subduction. In southeastern Paleocontinent, association other points complex prolonged Rhyacian accretionary system similar