Discussion of “Oxygen isotope and trace element compositions of platiniferous dunite pipes of the Bushveld Complex, South Africa – Signals from a recycled mantle component?” by Günther, T., Haase, K.M., Junge,M., Oberthür, T., Woelki, D., and Krumm, S

BY ROGER N. SCOON AND ANDREW A. MITCHELL. Günther et al. (2018) have either overlooked or misunderstood the complexities of the platiniferous dunite pipes of the Bushveld Complex, South Africa in many respects. The attempt to suggest there is a continuum of olivine compositions between the main bodies of dunite …

Discussion of “Arguments against Syn-magmatic Sills in the Bushveld Complex, South Africa” by R. Latypov, S. Chistyakova and J. Kramers

BY ROGER N. SCOON AND ANDREW A. MITCHELL. Latypov et al. (2017) present the concept of periodic intrusion of basal magma flows and lateral mixing as the “traditional” interpretation of the evolution of the Rustenburg Layered Suite (RLS). This is a generalisation that displays a lack of appreciation of the …

Chemistry, Morphology and Origin of Magmatic-Reaction Chromite Stringers Associated with Anorthosite in the Upper Critical Zone at Winnaarshoek, Eastern Limb of the Bushveld Complex

Buy Roger N. Scoon1 and Gelu Costin. The occurrence of numerous chromitite layers within the Rustenburg Layered Suite of the Bushveld Complex, South Africa, has been widely cited in models to explain the origin of the igneous layering. Most hypotheses are based around the principle of episodic replenishment of the …

Geology and Origin of the Vanadiferous Fe-Ti Oxide-rich Kennedy’s Vale Discordant Body, Eastern Limb of the Bushveld Complex, South Africa

BY R.N. SCOON, G. COSTIN AND P.J. GRÄBE. The 2055 Ma Bushveld Complex, South Africa, is well known for the occurrence of discordant bodies within the Rustenburg Layered Suite (RLS). Many discordant bodies disrupt mining of layered reefs, but a few have been successfully exploited, including the well known platiniferous …

35th International Geological Congress – Northern Tanzania: Geotourism of the Gregory Rift Valley and Serengeti Plains including Active Volcanism

Many of the high plateaus that characterize the East African landscape, including the Serengeti Plains are underlain by crystalline rocks of the Archaean and Proterozoic Eras. The Basement complexes were subsequently subjected to repeated cycles of uplift and erosion that commenced during the break-up of Gondwana (Jurassic-Palaeogene) and continued intermittently …

Discussion of “The Bushveld Complex, South Africa: formation of platinum–palladium, chrome- and vanadium-rich layers via hydrodynamic sorting of a mobilized cumulate slurry in a large, relatively slowly cooling, subsiding magmachamber” by Maier et al. (2013) MinerDeposita 48:1–56

BY ROGER N. SCOON AND ANDREW A. MITCHELL. We believe the hypothesis presented by Maier et al. (Miner Deposita 48:1–56, 2012) for the formation of the various ore bodies in the Bushveld Complex to be overly simplistic, and we raise concerns that some of our work, used in support of …

Discussion of “The Bushveld Complex, South Africa: formation of platinum–palladium, chrome- and vanadium-rich layers via hydrodynamic sorting of a mobilized cumulate slurry in a large, relatively slowly cooling, subsiding magmachamber” by Maier et al. (2013) MinerDeposita 48:1–56

BY ROGER N. SCOON AND ANDREW A. MITCHELL. We believe the hypothesis presented by Maier et al. (Miner Deposita 48:1–56,2012) for the formation of the various ore bodies in the Bushveld Complex to be overly simplistic, and we raise concerns that some of our work, used in support of this …

The upper zone of the Bushveld Complex at Roossenekal, South Africa: geochemical stratigraphy and evidence of multiple episodesof magma replenishment

BY ROGER N. SCOON AND ANDREW A. MITCHELL. Drill core from a fence of five boreholes located in the vicinity of Roossenekal, in the eastern limb of the Bushveld Complex, SouthAfrica, provides complete coverage of what is probably one of the thickest and most well-developed sections of the Upper Zone. …