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Browsing Theses and Dissertations (Geology) by Supervisor "Roberts, R.J. (James)"
Now showing items 1-20 of 27
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Alteration assemblage in the lower units of the Uitkomst Complex, Mpumalanga Province, South Africa (University of Pretoria, 2012-09-14)The Uitkomst Complex is located within the Great Escarpment area close to the town of Badplaas, approximately 300 km due east of Pretoria, in the Mpumalanga Province, South Africa. This complex is believed to represent a ...
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(University of Pretoria, 2017)With an estimated erupted volume of 300,000 km3 and an areal extent of more than 200,000 km2, the Paleoproterozoic (2.06 Ga) silicic volcanic rocks of the Rooiberg Group (Kaapvaal Craton) in northern South Africa forms ...
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(University of Pretoria, 2012-07-16)Rock density is critical for determining the tonnage of an orebody and therefore impacts on the total resource of a deposit. Density is defined as the concentration of matter, and is expressed as mass per unit volume (g/cc; ...
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(University of Pretoria, 2013-05-24)Euhedral clinopyroxene mega-crystals have been retrieved from Marion Island, a volcanic island situated on an inactive transform fault near the mid oceanic ridge on Antarctic tectonic plate and part of the Prince Edward ...
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(University of Pretoria, 2009-04-07)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2012-11-12)The coalfields of South Africa contain numerous dolerite intrusions, which are believed to have affected the quality of the surrounding coal by a thermal process, controlled by the size of the magmatic body. Data gathered ...
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(University of Pretoria, 2012-08-14)The Twickenham Platinum Mine (TPM) Project is located in the north eastern limb of the Bushveld Complex, north west of Steelpoort in the Limpopo Province. The property hosts platinum group metals (PGM) mineralisation in ...
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(University of Pretoria, 2022-03-08)The Karoo Large Igneous Province (KLIP) in South Africa comprises a spatially limited basalt suite (Drakensberg Group) and a spatially extensive dolerite suite. This study aims to establish a tectonic regime that could ...
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(University of Pretoria, 2018)South African coals of the Main Karoo Basin, which are generally inertinite-rich, continue to be important to the country’s economic prospects. The formation of inertinite macerals present in coal continues to be a subject ...
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(University of Pretoria, 2016)Marion Island is a sub-Antarctic island which lies 300 km south of the South West Indian Ridge. The island is extensively affected by two periods of volcanism with the oldest erupting during the Pleistocene and the younger ...
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(University of Pretoria, 2014)On the north-western edge of the Witbank Coalfield, near the town of Delmas (Mpumalanga Province) a prominent and undulating sill is believed to affect quality of the coal in the seams mined in the area. The study area ...
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(University of Pretoria, 2012-07-16)The Main Zone is dominated by medium – grained, homogeneous gabbronorite, and anorthosites. The plagioclase compositions of the core is ((Na(0.227 – 0.353), K (0.012 – 0.046), Ca (0.651 – 0.777)) Al (1.630 – 1.752) Si ...
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(University of Pretoria, 2013)Carbonatites are exotic rocks which usually occur in discrete intrusions. Considering the association of carbonatites with rifting environments, this dissertation proposes that: carbonatites occur in extensional tectonic ...
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(University of Pretoria, 2019)The study takes place in the Dwarsrivier area which lies on the border between Mpumalanga and Limpopo, to the North-West of Lydenberg, at an exposed road cutting. Within the road cutting, there is a unique portion of exposed ...
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(University of Pretoria, 2013)The 2.06 to 2.054 Ga Bushveld Igneous Complex intruded into the sedimentary rocks of the Transvaal Supergroup and generated an extensive contact metamorphic aureole mainly developed in the upper Pretoria group. The studied ...
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A mineralogical and geochemical review of cycles V and VI of the Upper Zone of the Bushveld Complex (University of Pretoria, 2015)The Upper Zone is situated at the top of the Rustenburg Layered Suite and according to Kruger et al. (1987) represents the final stages of magma recharge. The Upper Zone, which is comprised of gabbro, anorthosite layers ...
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(University of Pretoria, 2012-11-22)The Bushveld Igneous Complex (BIC) is the largest layered mafic intrusion in the world and contains the largest known deposits of vanadium, chromium and Platinum group elements on the planet, as well as large deposits of ...
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(University of Pretoria, 2020)An in-depth understanding of the physico-chemical nature of coal is required in order to meet ever-increasing energy demands and environmental legislature. New and classical coal analysis techniques were used on ...
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(University of Pretoria, 2023)The Kaapvaal Craton in South Africa is characterised by ultramafic to mafic complexes, and several mafic intrusions are associated closely with different sections of the craton. The focus of this research is the Transvaal ...
Now showing items 1-20 of 27