Geochemical and geochronological signatures of granitoids from the Chaillu massif, Congo Craton: Insights into Mesoarchean crustal growth

•Petrography, geochemistry, zircon U-Pb on Archean granitoids from the Chaillu inlier.•The granitoids include TTGs, sanukitoids, and potassic granites.•TTG magmatism between 3.02 and 2.92 Ga.•Coeval TTGs, sanukitoids, and potassic granites between 2.91 and 2.82 Ga. We present new geochemical and geochronological data for Mesoarchean to Neoarchean plutons of the Chaillu inlier of the Congo Craton that demonstrate an evolution of magma sources in relation with crustal growth. Four distinct plutonic suites were newly identified: (1) sodic low medium/high-pressure tonalite-trondhjemite-granodiorite, (2) Mg–K-rich monzogranite to monzodiorite (sanukitoids), (3) K-rich monzogranite–syenogranite, (4) K-rich granodiorite–monzogranite with medium/high-pressure TTG-like signatures. The TTGs are metaluminous to slightly peraluminous, silica-rich magmatic rocks (SiO2 > 67.5 wt%) with high contents of Na2O (3.5