Dr Trishya Owen-Smith

Overview

Trishya Owen-Smith is an igneous petrologist and geochemist. She completed her PhD at the University of the Witwatersrand in 2014, and subsequently worked as a post-doctoral researcher at the GeoForschungsZentrum (GFZ) in Potsdam, Germany. She joined the Department of Geology at UJ in 2016. Her previous research has centred on examining the magmatic products of Large Igneous Provinces—in the case of the Deccan Traps, alkaline intrusive magmatism in the Seychelles; in the Paraná-Etendeka Province, dyke swarms, intrusions and flood basalts in Namibia—to interpret their emplacement and evolution, as well as implications for mantle dynamics and continental break-up. Her more recent focus is on the petrogenesis of massif-type anorthosite complexes—specifically the Kunene Complex of Angola/Namibia—and the insights they give into Proterozoic crust-forming processes. Research Interests Mantle geochemistry and dynamics; magma differentiation and emplacement processes; early Earth evolution and tectonics; palaeoclimate and mass extinction events; planetary geology/cosmochemistry Teaching Optical Mineralogy (1st year) Environmental Isotope Geochemistry (Honours) 3rd year and Honours field schools Recent publications Milani, L., Oosthuizen, L.*, Owen-Smith, T.M., Bybee, G.M., Hayes, B., Lehmann, J. & Jelsma, H. (2024). Magnetite geochemistry as a proxy for metallogenic processes: A study on sulfide-mineralized mafic–ultramafic intrusions peripheral to the Kunene Complex in Angola and Namibia. Mineralium Deposita . https://doi.org/10.1007/s00126-024-01288-x Ferreira, E., Lehmann, J., Rodrigues, J.F., Hayes, B., Merino-Martínez, E., Milani, L., Bybee, G.M., Owen‑Smith, T.M., 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.M.L. (2024). Zircon U-Pb and Lu-Hf isotopes reveal the crustal evolution of the SW Angolan Shield (Congo Craton), Gondwana Research , 131, 317–342. https://doi.org/10.1016/j.gr.2024.03.010 Tau, G.L.*, Hofmann, A., Lehmann, J., Owen-Smith, T., Pellerin, A., Thomazo, C., Reinke, C., Wilson, A.H. (2024). The Lanseria palaeosol: Implications for palaeoweathering and terrestrial life at ∼2.6 Ga on the Kaapvaal Craton. Precambrian Research , 405, 107352. https://doi.org/10.1016/j.precamres.2024.107352 ​Lehmann, J., Brower, A., Owen-Smith, T.M., Bybee, G.M. & Hayes, B. (2023). Integrated geology and remote sensing reveal the architecture of the giant Mesoproterozoic Kunene Complex anorthosites (Angola/Namibia). Geoscience Frontiers , 14(5), 101620. https://doi.org/10.1016/j.gsf.2023.101620 Ncube, S.*, Wabo, H., Owen-Smith, T.M., Gumsley, A.P. & Beukes, N.J. (2023). The Puduhush gabbro in Griqualand West, South Africa: extending ca. 1.89 to 1.83 Ga intraplate magmatism across the proto-Kalahari Craton. South African Journal of Geology , 126(1), 75–92. https://doi.org/10.25131/sajg.126.0006 Milani, L., Lehmann, J., Bybee, G.M., Hayes, B., Owen-Smith, T.M., 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 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 . http://dx.doi.org/10.1144/jgs2020-125 Owen-Smith, T.M., Trumbull, R.B., Bauer, K., Keiding, J.K. & Will, T.M. (2021). A neural network application to assess magma diversity in the Etendeka igneous province, Namibia. South African Journal of Geology, 124(2), 481-498. https://doi.org/10.25131/sajg.124.0034 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 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, 105393. doi:10.1016/j.precamres.2019.105393 Owen-Smith, T.M., Ganerød, M., van Hinsbergen, D.J.J., Gaina, C., Ashwal, L.D. & Torsvik, T.H. (2019). Testing Early Cretaceous Africa–South America fits with new palaeomagnetic data from the Etendeka Magmatic Province (Namibia). Tectonophysics , 760, 23-35. doi:10.1016/j.tecto.2017.11.010 *MSc and PhD students External links ORCID Google Scholar ResearchGate LinkedIn