Geology

Geology

Prof. Goonie Marsh

Professor Emeritus

Igneous petrology

Ph.D. University of Cape Town (RSA)

Research Associate

E-mail: goonie.marsh(at)ru.ac.za

RESEARCH INTERESTS

• Petrology of Karoo and Etendeka continental flood basalt provinces
• Petrology of alkaline igneous rocks

• E-R. Neumann, J.S. Marsh, C.Galerne, S. Polteau, H. Svensen, and S. Planke (submitted) Compositional complexity and westward flow direction in the Gap dykes, southeastern Karoo Basin (South Africa). Journal of Volcanology and Geothermal Research.
• A.E. Jay, J.S. Marsh, F. Fluteau and V. Courtillot (2018) Emplacement of inflated pahoehoe flows in the Naude’s Nek Pass, Lesotho remnant, Karoo Continental Flood Basalt Province: use of flow-lobe tumuli in understanding flood basalt emplacement. Bulletin of Volcanology, 80, https://doi.org/10.1007/s00445-017-1189-6.
• M. Moulin, F. Fluteau, V. Coutillot, J. Marsh, G. Delpech, X. Quidelleur,  and M. Gérard (2017) Eruptive history of the Karoo lava flows and their impact on Early Jurassic climate change. Journal of Geophysical Research Solid Earth, 122 doi: 10.1 002/2016JB0 13354.
• J. S. Marsh (2016) Karoo dolerite intrusions – shaping landscapes of the Great Karoo, 81-87.  In: Anhaeusser, CR, Viljoen, MR, and Viljoen, RP (Eds.) Africa’s Top Geological Sites. Struik Nature, Cape Town, 312pp.
• J. S. Marsh (2016) New evidence for the correlation of basalts of the Suurberg Group with the upper part of the Karoo basalt sequence of Lesotho, 59-65. In: B. Linol and M. De Wit (Eds.) Regional Geology Reviews 8643: Origin and Evolution of the Cape Mountains and Karoo Basin, Springer Verlag.
•  J.S. Marsh and R. Swart (2016) The Bero Volcanic Complex: Extension of the Paraná-Etendeka Igneous Province into SW Angola. Journal of Volcanology and Geothermal Research, http://dx.doi.org/10.1016/j.jvolgeores.2016.10.011
• H. H. Svensen, S. Planke, E-R. Neumann, I. Aarnes, J.S. Marsh, S. Polteau,  C. H. Harstad, and L. Chevallier, (2015) Subvolcanic intrusions and the link to global climatic and environmental changes. Advances in Volcanology, doi: 10.1007/11157_2015_10.
• C. Harris, P. Le Roux, R. Cochrane, L. Martin, A.R. Duncan, J.S. Marsh,  A.P le Roex and C. Class (2015) Oxygen isotope composition of Karoo and Etendeka picrites: High δ¹⁸O mantle or crustal contamination? Contributions to Mineralogy and Petrology, doi 10.1007/s00410-015-1164-1.
• M. Moulin, F. Fluteau, V. Courtillot, J. Marsh, G. Delpech, X. Quidelleur, M. Gerard and A. Jay (2011) An attempt to constrain the age, duration, and eruptive history of the Karoo flood basalt: the Naude's Nek section (South Africa). Journal of Geophysical Research, 116, B07403, doi:10.1029/2011JB008210.

• J.S. Marsh (2014) Sr, Nd, and Pb-isotopes in Cretaceous basanites, SW Angola – evidence for a HIMU component in the mantle source and crustal contamination.  Abstract, IMSG meeting, Rhodes University, Grahamstown.
• J.S. Marsh and R. Swart (2014) The Bero Volcanic Group: an extension of the Etendeka Igneous Province into the Namibe Basin, SW Angola.  Abstract, The Roy Miller Symposium, Windhoek, Namibia.
• I. Sharp, K. Verwer, H. Ferreira, M. Snidero, V. Machado, E. Holtar, R. Swart, J. Marsh, L. Gindre, C. Puigdefabregas, and M. Fejersko. (2012) Pre- and Post-Salt non-marine carbonates of the Namibe Basin, Angola.  AAPG Search and Discovery Article # 90142, AAPG Annual Convention and Exhibition, Long Beach, California.
• J.A. Lodge and J.S. Marsh (2011) Petrology and geochemistry of rare wide dykes in the basaltic sequence of Lesotho. Igneous and Metamorphic Studies Group meeting, Stellenbosch.
• J.S. Marsh (2011) Volcanism in the on-shore Namibe Basin, SW Angola. Namibe Basin Seminar, Zebra River, Namibia.
• J.S. Marsh (2011) Cretaceous volcanism in the on-shore Namibe basin, southern Angola. Igneous and Metamorphic Studies Group meeting, Stellenbosch.