James Roberts


James Roberts

Senior Lecturer

Igneous Petrology and Geochemistry

Office: 4-41

E-mail: [email protected]

Phone: +27 (0)12 420 3765


  • Magmatic liquids and the crystallisation of such liquids.
  • Geochronology and isotopic provenance studies
  • Metallurgy of gold
  • Formation of the Bushveld Complex


2003-2007               PhD Geology, University of Witwatersrand, RSA
2001-2003               MSc Geology, University of the Witwatersrand, RSA

2000-2005               BA, UNISA, RSA

1996-1999               BSc (Honours), Rhodes University, RSA



2007-present           Senior Lecturer in Igneous Petrology

                              University of Pretoria, South Africa

2006-2007               Researcher, SAPS Forensic Science Laboratory

2001-2006               Research assistant and demonstrator for various courses at University of the Witwatersrand

2000-2001               Employed by Anglogold



2009                      GLY711 – Igneous Petrology (Hons)

                             GLY713- Mineralogy (Hons)

GLY251- Mineralogy (2nd yr)

GLY261- Igneous Petrology



Norwegian Geological Meeting, Oslo, Norway, 2003: “The Carboniferous Magerøy Dykes”

Natural History Museum, Oslo, Norway, 2003: “The Seiland Igneous Province”

Geoforum 2003, Johannesburg, South Africa: “Sulphide Saturation in the Upper Zone of the Bushveld Complex”

Scandinavian Winter Meeting, Uppsala, Sweden, 2004: “New Ages from the Seiland Igneous Province, Northern Norway”

Goldschmidt Conference, Copenhagen, Denmark, 2004: “A Re-evaluation of the Seiland Igneous Province, northern Norway (poster)

IMSG Summer meeting 2009, UP, South Africa: “Liquids and Layers: modelling the Upper Zone of the Bushveld Complex


Roberts, R.J., Torsvik, T.H., Andersen, T.B., and Rehnstrohm E.F., 2003, The Early Carboniferous Magerøy dykes, northern Norway: paleomagnetism and paleogeography, Geol. Mag., 140, p. 443- 451

Roberts, R.J., Corfu, F., Torsvik, T.H., Ashwal, L.D., & Ramsay, D.M., 2006, Short-lived mafic magmatism at 560- 570 Ma in the northern Norwegian Caledonides: U-Pb zircon ages from the Seiland Igneous Province, Geological Magazine 143, 887- 903

F. Corfu, T.H. Torsvik, T.B. Andersen, L.D. Ashwal, D.M. Ramsay, and R.J. Roberts, Early Silurian mafic–ultramafic and granitic plutonism in contemporaneous flysch, Magerøy, northern Norway: U–Pb ages and regional significance, Journal of the Geological Society, Mar 2006; 163: 291 – 301

Corfu, F., Roberts, R.J., Torsvik, T.H., Ashwal, L.D., & Ramsay, D.M., Peri-Gondwanan elements in the Caledonian nappes of Finnmark, Northern Norway: implications for the paleogeographic framework of the Scandinavian Caledonides, American Journal of Science, Vol. 307, 434-458

Ashwal L.D., Roberts R.J., Schmitz M.D., Hetherington C.J., Corfu F., Burke K., & Gerber M., Geochronology of large zircons from nepheline syenite gneisses as constraints on tectonic setting: an example from Southern Malawi, Contrib. Min. Pet, 153, 389- 403


Papers in preparation

Roberts R.J., Corfu, F., Torsvik, T.H., Hetherington C.J., and Ashwal, L.D., Rifting in the Late Precambrian craton of Baltica: evidence from alkaline intrusions in the Seiland Igneous Province, submitted to Geol.Soc. London




Published by Zama Mthembu

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