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Dr Clarisa Vorster

Senior Lecturer
Name: Clarisa Vorster
Location: C1 Lab 420 Auckland Park Kingsway Campus
Department of Geology Staff  Staff Members

Contact Details:
Tel: +27 (0)11 559 4784​

Email: clarisav@uj.ac.za

About Dr Clarisa Vorster

​Biography

Dr. Clarisa Vorster has a PhD (Geology) and an MSc (Chemistry) from the University of Johannesburg. She was appointed as a lecturer in 2013 upon completion of her PhD. She is a geochronologist specializing in detrital zircon age determinations and provenance determination of sedimentary units. Her PhD research project focused on the U-Pb age determination of detrital zircon populations in the Phanerozoic Cape and Lower Karoo Supergroups by means of Laser Ablations ICP-MS. Some of the study areas for this project included the Western and Southern Cape, Kwazulu Natal, Southern Argentina and the Falkland Islands. Together with her postgraduate students, her research is currently focused on the U-Pb age determination and provenance of detrital zircons from the smaller basins of the Karoo Supergroup. Together with her postgraduate students, her research is currently focused on the U-Pb age determination and provenance of detrital zircons from various sedimentary successions. She is also part of an international team of scientists investigating the Moodies Group (Barberton Supergroup) as part of the ICDP-BASE (International Continental Drilling Program- Barberton Archean Surface Environments) initiative. Her research is supported by both the PPM (Paleoproterozoic Mineralization) and DSI-NRF-CIMERA (Centre of Excellence for Integrated Mineral and Energy Resource Analysis) research centers.

Dr. Vorster is also responsible for maintaining the zircon sample preparation and Laser Ablation ICP-MS laboratories at SPECTRUM (the central analytical facility at UJ), where she is actively involved in training students and technical assistants in zircon sample preparation and LA-ICP-MS analysis of samples.

Research interests

U-Pb age determination and provenance of detrital zircons of the Barberton, Transvaal, Cape and Karoo Supergroups.

Teaching responsibilities

Sedimentology and Stratigraphy
Basin analysis
Applied and Environmental Mineralogy
Introduction to Geological Field Methods First Year Field School
Geological Field Techniques Second Year Field School

Publications
  • Jeffrey, L.L., Beukes, N., Vorster, C., Mukhopadhyay, J. (2023) New insight into the tectonic setting of fault-bounded Indian Gondwana coal basins from U-Pb detrital zircon provenance ages of the Bokaro and Jharia basins, central east India. Geological Magazine, 160(2), 334-354. https://doi.org/10.1017/S0016756822000930
  • Agra, N.A., Elburg, M.A., Vorster, C. (2023). Constraints on Paleoproterozoic crustal growth from Birimian Supergroup lavas of the Bui belt (Ghana) in the West African Craton. Precambrian Research, 384,106926. https://doi.org/10.1016/j.precamres.2022.106926
  • Rajesh, H.M., Mosokomani, V.S., Belyanin, G.A., Vorster, C., Selepeng, A.T. (2022). Defining the contact zone between Archean-Proterozoic terranes with distinct geologic histories: The scenario from eastern Botswana, Precambrian Research, 378, 106769. https://doi.org/10.1016/j.precamres.2022.106769
  • Rajesh, H.M., Safonov, O.G., Belyanin, G.A., Vorster, C. (2022). Contrasting fertility of metapelite vs diorite gneiss to produce leucogranite melts: Example from the Mahalapye Complex, eastern Botswana. Journal of African Earth Science, 187, 104465. https://doi.org/10.1016/j.jafrearsci.2022.104454
  • Vorster, C., Kramers, J.D., Beukes, N.J, Penn-Clarke, C.R. (2021) Long-lived stable shelf deposition along Gondwana’s southern margin during the Ordovician-Silurian: Inferences from U–Pb detrital zircon ages of the Table Mountain Group (South Africa) and correlatives in Argentina and the Falklands/Malvinas Islands. Chemical Geology, 576, 120274. https://doi.org/10.1016/j.chemgeo.2021.120274
  • Rajesh, H.M., Safonov, O.G., Belyanin, G.A., Vorster, C. (2020) A ~2.051 Ga anatectic event and peraluminous leucogranite from the Mahalapye Complex, northern edge of the Kaapvaal Craton: Record of an effect of Bushveld mafic magmatism. Lithos, 378, 105805. https://doi.org/10.1016/j.lithos.2020.105805
  • Ossa Ossa, F., Hofmann, A., Ballouard, C., Vorster, C., Schoenberg, R., Fiedrich, A., Mayaga-Mikolo, F., Bekker, A., (2020). Constraining provenance for the uraniferous Paleoproterozoic Francevillian Group sediments (Gabon) with detrital zircon geochronology and geochemistry. Precambrian Research, 343, 105724. https://doi.org/10.1016/j.precamres.2020.105724
  • Barbolini, N., Nxumalo, V., Wagner, N., Kramers, J., Vorster, C., Cairncross, B., Bamford, M.K., (2019) Palynostratigraphic correlation of the Springbok Flats coalfield to other coal-bearing successions in the Karoo basins of southern Africa. South African Journal of Geology. doi:10.25131/sajg.122.0001
  • Beukes, N.J., De Kock, M.O., Vorster, C., Ravhura, L.G., Frei, D., Gumsley, A.P., Harris, C. (2019) The age and country rock provenance of the Molopo Farms Complex: implications for Transvaal Supergroup correlation in southern Africa. South African Journal of Geology, doi:10.25131/sajg.122.0003
  • Rajesh, H.M., Belyanin, G.A., Safonov, O.G., Vorster, C., Van Reenen, D.D. (2018). Garnet-bearing low-Sr and high-Sr Singelele leucogranite: A record of Neoarchean episodic melting in collisional setting and Paleoproterozoic coverprint in the Beit Bridge complex, southern Africa. Lithos, 322, 67-86. doi:10.1016/j.lithos.2018.10.004
  • Vorster, C., Kramers, J.D., Beukes, N.J. and Van Niekerk, H.S.(2016) Detrital zircon U-Pb age determination and provenance of the Paleozoic Natal Group and Msikaba Formation, Kwazulu-Natal, South Africa. Geological Magazine, 153, 460-486. doi:10.1017/S0016756815000370
  • Wohlgemuth-Ueberwasser, C., Viljoen, F., Petersen, S and Vorster, C. (2015) Distribution and solubility limits of trace elements in hydrothermal black smoker sulfides: An in-situ LA-ICP-MS study. Geochimica et Cosmochimica Acta 159, 16–41. doi:10.1016/j.gca.2015.03.020
  • Belyanin, G., Kramers, J.D., Vorster, C., Knoper, M.W. (2014) The timing of successive fluid events in the Southern Marginal Zone ofthe Limpopo Complex, South Africa: Constraints from 40Ar–39Ar Geochronology. Precambrian Research, 254, 169-193. doi:10.1016/j.precamres.2014.08.014
  • Vorster, C., Kramers, J., Beukes, N., Van Niekerk, H., (2012) Detrital zircon age populations and provenance of the Cape-Karoo succession in South Africa and correlatives in Argentina. Goldschmidt 2012 Conference Abstracts, Mineralogical Magazine, 2501. doi:10.1017/S0016756815000370
  • Vorster, C., Van der Walt, T.N., Coetzee, P.P., (2008) Ion exchange separation of strontium and rubidium on Dowex 50W-X8, using the complexation properties of EDTA and DCTA. Analytica and Bioanalytica Chemistry, 392, 287-296. doi:10.1007/s00216-008-2260-0