Prof Jérémie Lehmann

Overview

Research interests: Evolution in the tectonics of orogens from the Archean to Paleozoic in the frame of secular changes through Earth’s history Paleoarchean Earth: Barberton Granite-Greenstone Terrain Mesoproterozoic Earth: Kunene Complex massif-type anorthosite Neoproterozoic to Cambrian Earth: Pan-African orogen of the Damara and Dahomeyide belts Mining exploration in orogenic belts Teaching: Second year: Structural Geology: stress, strain, rheology, brittle and ductile deformation at tectonic plate scale to mesoscale. Includes four days field excursion in Johannesburg dome basement gneisses and greenstones and deformed Witwatersrand Supergroup cover. Honours: Tectonic Evolution of Mountain Building Areas: structural geology and rheology of the lithosphere. Microstructures. Excursion: Advanced Field Mapping (3 weeks) Recent publications: Ormond, R.J.*, Lehmann, J., Hasalová, P., Elburg, M.A., 2024. A migmatite dome as a result of multi-fold interference pattern in the Damara Belt, Namibia. J ournal of Structural Geology , 180, 105059. https://doi.org/10.1016/j.jsg.2024.105059 Travers, L.*, Chauvet, A. and Lehmann, J., 2023. Structure and Distribution of the Gold-Related Quartz Vein Systems in the Southwestern Part of the Barberton Greenstone Belt (South Africa, Eswatini). Minerals , 13(8): 1034. https://doi.org/10.3390/min13081034 Lehmann, J., Brower, A.M.*, Owen-Smith, T.M., Bybee, G.M. and Hayes, B., 2023. Landsat 8 and Alos DEM geological mapping reveals the architecture of the giant Mesoproterozoic Kunene Complex anorthosite suite (Angola/Namibia). Geoscience Frontiers , 101620. https://doi.org/10.1016/j.gsf.2023.101620 Milani, L., Lehmann, J., Bybee, G.M., Hayes, B., Owen-Smith, T., Oosthuizen, L., Delport, P.W.J., Ueckermann, H. 2022. Geochemical and geochronological constraints on the Mesoproterozoic Red Granite Suite, Kunene AMCG Complex of Angola and Namibia, Precambrian Research , 379, 106821. https://doi.org/10.1016/j.precamres.2022.106821 Ormond, R.J.*, Lehmann, J. 2022. Polyphase Archean to Paleoproterozoic deformation in the core of the Kaapvaal Craton, implications for the formation of the Johannesburg Dome, Journal of Structural Geology , 157, 104554. https://doi.org/10.1016/j.jsg.2022.104554 Kwayisi, D.*, Lehmann, J., Elburg, M.A. 2022 Provenance and depositional setting of the Buem Structural Unit (Ghana): Implications for the Paleogeographic reconstruction of the West African and Amazonian cratons in Rodinia, Gondwana Research , 109, 183-204. https://doi.org/10.1016/j.gr.2022.04.020 Kwaysi, D.*, Elburg, M.A., Lehmann, J. 2022. Preserved ancient oceanic lithosphere within the Buem structural unit at the eastern margin of the west African craton, Lithos , 410-411, 106585. https://doi.org/10.1016/j.lithos.2021.106585 Hayes, B., Lehmann, J., Bybee, G.M., Owen-Smith, T.M. 2022. Crystal transfer from magma to wallrock during syntectonic granite emplacement, Journal of the Geological Society , 179(1). http://dx.doi.org/10.1144/jgs2020-125 Andersen, T., Elburg, M.A., Lehmann, J. 2020. Enigmatic provenance signature of sandstone from the Okwa Group, Botswana, South African Journal of Geology , 123 (3), 331–342. https://doi.org/10.25131/sajg.123.0022 Lehmann, J., Bybee, G.M., Hayes, B., Owen-Smith, T.M., Belyanin, G. 2020. Emplacement of the giant Kunene AMCG Complex into a contractional ductile shear zone and implications for the Mesoproterozoic tectonic evolution of SW Angola, International Journal of Earth Sciences , 109, 1463-1485. https://doi.org/10.1007/s00531-020-01837-5 Kwayisi, D.*, Lehmann, J., Elburg, M.A. 2020. The architecture of the Buem Structural Unit: Implications for the tectonic evolution of the Pan-African Dahomeyide Orogen, West Africa, Precambrian Research , 105568. https://doi.org/10.1016/j.precamres.2019.105568 Bybee, G.M., Hayes, B., Owen-Smith, T.M., Lehmann, J., Ashwal, L.D., Brower, A.M.*, Hill, C.M., Corfu, F., Manga, M. 2019. Proterozoic massif-type anorthosites as the archetypes of long-lived (≥ 100 Myr) magmatic systems—new evidence from the Kunene Anorthosite Complex (Angola). Precambrian Research , 332 (15), 105393. https://doi.org/10.1016/j.precamres.2019.105393 Milani, L., Lehmann, J., Naydenov, K.V., Saalmann, K., Nex, P.A.M., Kinnaird, J.A., Friedman, I.S., Woolrych, T., Selley, D. 2019. Geology and mineralization of the Cu-rich Mumbwa district, a potential IOCG-type system at the eastern margin of the Pan-African Hook batholith, Zambia, Journal of African Earth Sciences , 158, 103513. https://doi.org/10.1016/j.jafrearsci.2019.103513 *MSc and PhD students