Nanjing Center of China Geological Survey, Nanjing 210016, China

Ibitiara pluton is outcropped in São Francisco Craton in Bahia, central and eastern Brazil, South America. The intrusive rocks are mainly composed of granodiorite, which falls into the metaluminous to weakly peraluminous calcium-alkaline I-type granites formed by the mixing of crustal and mantle magma. Geochemical studies indicate that the granodiorite is characterized by the enrichment in large ion lithophile elements(LILE)(e.g., Ba) and incompatible elements (e.g., U and Th). But depletion in high field strength elements(HFSE)(e.g.,Nb, P and Ti). It has the features of high SiO₂ and high potassium calc-alkaline series. It also shows high fraction of LREE and HREE, and enrichment of LREE, with weak Eu anomaly. The REE distribution curve is obviously right-inclined. SHRIMP U-Pb age suggests that Ibitiara pluton granodiorite is defined as 2 103±8 Ma, which is the product of magmatic activity from Late Rhyacian to Early Orosirian of Paleoproterozoic. The age of the rock mass is consistent with the magmatic tectonic setting of the Amazonian structural cycle (around 2.1 Ga) in the São Francisco Craton. Ibitiara pluton also belonged to the component of the Columbia supercontinent and was possible to be the product of magmatic activity of Atlantic continental blocks.