Dr Trishya Owen-Smith

Trishya Owen-Smith is an igneous petrologist and geochemist currently based at the University of Johannesburg. She completed her PhD at the University of the Witwatersrand and subsequently worked as a post-doctoral researcher at the GeoForschungsZentrum (GFZ) in Potsdam, Germany.

Her research interests include mantle geochemistry and dynamics, magma differentiation and emplacement processes, and early Earth evolution and tectonics. Her previous work 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. Trishya’s current research with CIMERA focuses on using petrology as a tool to understand mineralisation processes.

PUBLICATIONS

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. https://doi.org/10.25131/sajg.124.0034

Hayes, B., Lehmann, J., Bybee, G.M., Owen-Smith, T.M (2021). Crystal transfer from magma to wallrock during syntectonic granite emplacement. Journal of the Geological Society. http://dx.doi.org/10.1144/jgs2020-125

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. https://doi.org/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. https://doi.org/10.1016/j.tecto.2017.11.010 

Owen-Smith, T.M., Ashwal, L.D., Sudo, M. & Trumbull, R.B. (2017). Age and petrogenesis of the Doros Complex, Namibia, and implications for early plume-derived melts in the Paraná-Etendeka LIP. Journal of Petrology, 58(3), 423-442. https://doi.org/1093/petrology/egx021 

Owen-Smith, T.M. & Ashwal, L.D. (2015). Evidence for multiple pulses of crystal-bearing magma during emplacement of the Doros layered intrusion, Namibia. Lithos, 238, 120–139. https://doi.org/1016/j.lithos.2015.08.019 

Owen-Smith, T.M. & Ashwal, L.D. (2015). Geology of the early Cretaceous Doros layered mafic intrusion, Namibia: Complexity on a small scale. South African Journal of Geology, 118(2), 185– https://doi.org/10.2113/gssajg.118.2.185 

Owen-Smith, T.M., Ashwal, L.D., Torsvik, T.H., Ganerød, M., Nebel, O., Webb S.J. & Werner S.C. (2013). Seychelles alkaline suite records the culmination of Deccan Traps continental flood volcanism. Lithos, 182–183, 33– https://doi.org/10.1016/j.lithos.2013.09.011

Ganerød, M., Torsvik, T.H., van Hinsbergen, D.J.J., Gaina, C., Corfu, F., Werner, S., Owen-Smith, T.M., Ashwal, L.D., Webb, S.J. & Hendriks, B.W.H. (2011). Palaeoposition of the Seychelles microcontinent in relation to the Deccan Traps and the Plume Generation Zone in Late Cretaceous–Early Palaeogene time. In: Van Hinsbergen, D.J.J., Buiter, S. J. H., Torsvik, T.H., Gaina, C. & Webb, S.J. (eds). The Formation and Evolution of Africa: A Synopsis of 3.8 Ga of Earth History. Geological Society, London, Special Publications, 357, 229– https://doi.org/10.1144/SP357.12

Owen-Smith, T.M., Ashwal, L.D., Sudo, M. & Trumbull, R.B. (2017). Age and petrogenesis of the Doros Complex, Namibia, and implications for early plume-derived melts in the Paraná-Etendeka LIP. Journal of Petrology, in press. doi:10.1093/petrology/egx021

Owen-Smith, T.M. & Ashwal, L.D. (2015). Evidence for multiple pulses of crystal-bearing magma during emplacement of the Doros layered intrusion, Namibia. Lithos, 238, 120–139. doi:10.1016/j.lithos.2015.08.019

Owen-Smith, T.M. & Ashwal, L.D. (2015). Geology of the early Cretaceous Doros layered mafic intrusion, Namibia: Complexity on a small scale. South African Journal of Geology, 118(2), 185–211. doi:10.2113/gssajg.118.2.185

Owen-Smith, T.M., Ashwal, L.D., Torsvik, T.H., Ganerød, M., Nebel, O., Webb S.J. & Werner S.C. (2013). Seychelles alkaline suite records the culmination of Deccan Traps continental flood volcanism. Lithos, 182–183, 33–47. doi:10.1016/j.lithos.2013.09.011

Ganerød, M., Torsvik, T.H., van Hinsbergen, D.J.J., Gaina, C., Corfu, F., Werner, S., Owen-Smith, T.M., Ashwal, L.D., Webb, S.J. & Hendriks, B.W.H. (2011). Palaeoposition of the Seychelles microcontinent in relation to the Deccan Traps and the Plume Generation Zone in Late Cretaceous–Early Palaeogene time. In: Van Hinsbergen, D. J. J., Buiter, S. J. H., Torsvik, T. H., Gaina, C. & Webb, S. J. (eds). The Formation and Evolution of Africa: A Synopsis of 3.8 Ga of Earth History. Geological Society, London, Special Publications, 357, 229–252. doi:10.1144/SP357.12

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. https://doi.org/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. https://doi.org/10.1016/j.tecto.2017.11.010

Owen-Smith, T.M., Ashwal, L.D., Sudo, M. & Trumbull, R.B. (2017). Age and petrogenesis of the Doros Complex, Namibia, and implications for early plume-derived melts in the Paraná-Etendeka LIP. Journal of Petrology, 58(3), 423-442. https://doi.org/10.1093/petrology/egx021