Statherian-Calymmian (ca. 1.6 Ga) magmatism in the Alto Moxotó Terrane, Borborema Province, northeast Brazil: Implications for within-plate and coeval collisional tectonics in West Gondwana

摘要: Abstract We present geochronological, geochemical, and isotopic data on Statherian–Calymmian metaplutonites located within the Alto Moxoto Terrane (Borborema Province, Brazil). The Carnoio Suite occurs a large area of this terrane. It is characterized by slightly deformed syenogranites quartz-syenites, which geochemical signature typical within-plate magmas. In contrast, Coloete in northern border Its petrographic characteristics vary between those granodiorite syenogranite, while its geochemistry suggests an arc-related/syn-collisional origin. There are few Statherian A-type granites Borborema Province African counterpart. Zircon crystals recovered from (dated 1638 Ma) 1652 Ma; LA-ICP-MS) provide some clues about magma volume concentration during Statherian-Calymmian transition. Coeval collisional magmas scarce region: they interpreted worldwide as product peripheral convergences coeval with fragmentation cratonic blocks. Our results suggest that was part ancient block affected intraplate event at transition; moreover, limits might have experienced accretion crust-reworking episode.