Ferreira, EzequielLehmann, JeremieRodrigues, José FelicianoHayes, BenMerino-Martinez, EnriqueMilani, LorenzoBybee, Grant M.Smith, Trishya M. OwenGarcía-Lobón, J. L.Tassinari, Colombo C. G.Ueckermann, HenrietteSato, KeiSilva, Paulo BravoCorreia, JoãoLabaredas, JoséDuarte, LaurentMolekwa, Mmasetena AnnaManuel, JoséVictorino, Américo da Mata2026-02-112026-02-112025-07Ferreira, E., Lehmann, J., Rodrigues, J.F., Hayes, B., Merino-Martinez, E., Milani, L., Bybee, G.M., Smith, T.M.O., García-Lobón, J.L., Tassinari, C.C.G., Ueckermann, H., Sato, K., Silva, P.B., Correia, J ., Labaredas, J., Duarte, L., Molekwa, M.A., Manuel, J. & Victorino, A.D.L. (2025). Zircon U-Pb and Lu-Hf Constraints on the Paleo-to Mesoproterozoic Evolution of the Southwest Angolan Shield (Congo Craton). In: Goldschmidt2025 - International Conference on Geochemistry, Abstract 28232, Prague, Czech Republic, 6-11 July, 2025. https://doi.org/10.7185/gold2025.28232http://hdl.handle.net/10400.9/6258ABSTRACT: The crustal evolution of the Angolan Shield (AS) remains poorly constrained. To address this, we analysed U-Pb and Lu-Hf isotopes in detrital and igneous zircons to determine the age and provenance of extensive sedimentary strata in southwest Angola, and use them as a proxy for the Paleoproterozoic to Mesoproterozoic evolution of the southwest AS. Mesoproterozoic maximum depositional ages between 1334 ± 8 Ma and 1184 ± 23 Ma for the Iona, Cahama, and Ompupa siliciclastic rocks refute previous correlations with the Paleoproterozoic Chela Group. Detrital zircon U-Pb and Lu-Hf isotopes closely match those of magmatic rocks from the southwest AS, indicating that Mesoproterozoic siliciclastic rocks were primarily derived from the AS.engU-Pb geochronologyZirconMesoproterozoic igneousCrustal evolutionAngola (Southwest)conference object10.7185/gold2025.28232