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Dissertations / Theses on the topic 'Geology – South Africa – Witteberg Group'

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Published: 4 June 2021
Last updated: 8 February 2022

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1

Olivier, Wernich Corné. "The geology of the Witteberg group, Cape supergroup, with specific focus on the Perdepoort member as a potential silica source." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1386.

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Selected outcrops of the Upper Devonian to Lower Carboniferous, Witteberg Group, Cape Supergroup were mineralogically and structurally analyzed. The study area is located approximately 30km northwest of Kirkwood and 10km south of Darlington Dam, Eastern Cape, South Africa. Strata predominantly consist of arenaceous Witpoort Formation, which includes the Perdepoort, and Rooirand Members. The Perdepoort Member is a thinly bedded quartzite also known as the "white streak". The Rooirand Member quartzite is a highly iron stained red-brown quartzite. The dark-grey, pyritic rich shales of the Kweekvl
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2

Goossens, Angelique Emily Maria. "A study of the structural geology of the Witteberg Group and lowermost Karoo Supergroup, Darlington Dam, Jansenville District, Eastern Cape." Thesis, University of Port Elizabeth, 2003. http://hdl.handle.net/10948/291.

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A number of outcrops of the Witteberg Group and lowermost Karoo Supergroup rocks were studied in the area south of the Darlington Dam, Jansenville District, with the aim of documenting structural characteristics of the area. All lithologies are folded with fold styles varying from gentle to near isoclinal (based on interlimb angle). Fold axes are either sub-horizontal or plunging at gentle to moderate angles whereas axial planes dip gently to vertically (predominantly steep to sub-vertical). Folds verge predominantly towards the north but where southward verging they are associated with faulti
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3

Brunsdon, Gideon. "A structural study of Witteberg group rocks (Cape supergroup) in the Cape fold belt, Steytlerville district, Eastern Cape." Thesis, Nelson Mandela Metropolitan University, 2006. http://hdl.handle.net/10948/d1019682.

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A structural study of Witteberg Group Rocks was conducted along the Soutkloof River, approximately 14 km east of Steytlerville, Eastern Cape Province of South Africa. Here a north to south geotraverse was studied in an attempt at unravelling the structural geology of the rocks belonging to the Upper Devonian to Lower Carboniferous Witteberg Group (Upper Cape Supergroup). These rocks are mostly arenaceous and include quartzite, sandstone, siltstone and shale which have been folded, faulted and metamorphosed. Thrust, normal and strike-slip faulting occur in the area. Shallow south-dipping low-an
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4

Doig, Heather Leslie. "Strike comparison of the compositional variations of the lower group and middle group chromitite seams of the critical zone, Western Bushveld complex." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1005618.

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The variations in the composition, specifically the Cr20 S content and the Cr:Fe ratio, and the morphology of the Lower Group (LG) and Middle Group (MG) chromitite seams of the Critical Zone (CZ) across the western Bushveld Complex, including the Ruighoek and Brits sections, is investigated by means of whole-rock chemical data, both major and trace elements analysis, XRD and electron microprobe data. As a result ofthe paucity of exposed or developed LG1 - LG5 chromitite seams in the western Bushveld Complex, this study is confined to the investigation of the compositional variations of the LG6
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5

Thamm, A. G. "Contributions to the geology of the Table Mountain Group." Master's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/21891.

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Modern analysis of Table Mountain Group sediments began with I. C. Rust's D.Sc. thesis "On the sedimentation of the Table Mountain Group in the western Cape Province" in 1967. Rust defined the stratigraphy of the Table Mountain Group, produced computer generated isopach and palaeocurrent maps for each formation and attempted palaeoenvironmental analyses based on what data he had available. For work dated prior to 1967 the reader is directed to Rust's excellent review in Chapter 2 of his thesis. The thesis served as a basis for Rust's later published work on the Cape Supergroup. Current publish
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6

Bartman, R. D. (Reynard Dirk). "Geology of the Palaeoproterozoic Daspoort Formation (Pretoria Group, Transvaal Supergroup), South Africa." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/42447.

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This thesis examines the geology of the Daspoort Formation (Pretoria Group, Transvaal Supergroup) of South Africa, with the accent on describing and interpreting its sedimentology. The Palaeoproterozoic Daspoort Formation (c. 2.1‐2.2 Ga) forms part of the Pretoria Group on the Kaapvaal craton. This sandstone‐ and quartzite‐dominated lithological formation covers an elliptical geographical area stretching from the Botswana border in the west to the Drakensberg escarpment in the east, with its northern limit in the Mokopane (Potgietersrus) area and Pretoria in the south; altered outliers ar
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7

Slabber, Nina. "The geology and geochemistry of the Bridgetown Formation of the Malmesbury Group, Western Cape Province." Thesis, Stellenbosch : Stellenbosch University, 1995. http://hdl.handle.net/10019.1/54889.

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Thesis (MSc) -- Stellenbosch University , 1995.<br>ENGLISH ABSTRACT: A number of small greenstone bodies of the Bridgetown Formation are exposed as elongated lenses and dykes within metasediments of the Malmesbury Group in the Western Cape Province, South Africa. The Malmesbury Group is part of the Neoproterozoic to Cambrian (Namibian) Saldania Subprovince which is the southern continuation of a Pan-African mobile belt system. A detailed geological and geochemical study was conducted on the largest outcrop of the Bridgetown Formation, situated 20km east of the town Moorreesburg. The Br
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8

Dinis, Yambi Renato Daniel. "Sedimentology of the lower Uitenhage Group in the Middle to Late Mesozoic Oudtshoorn Basin, South Africa." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29618.

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The Oudtshoorn Basin is the largest onshore Mesozoic depocentre along the southern margin of South Africa, and is among the sedimentary basins that have been linked to the break-up of southern Gondwana. Filled by the continental lower Uitenhage Group, which for the most part is sparsely fossiliferous, difficult to correlate on a regional scale and void of non-renewable natural resources, the Oudtshoorn Basin is relatively poorly studied. This project aims at carrying out an in depth, field- and lab-based investigation of the sediment supply processes and directions, location of sediment source
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9

Browning, Claire. "A preliminary investigation and photographic atlas of nodules found in the Bokkelveld group (Gydo formation), Steytlerville district, South Africa." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/927.

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Nodules within the lower Bokkeveld shales often contain well-preserved invertebrate fossil material. The aim of this study was to describe some characteristics seen at various scales (macro-, micro- and ultra -) within nodules that might contribute to an understanding of aspects of nodule formation and the reasons for the excellent preservation of the fossil material within these nodules. Detailed, high quality macro-photographs were taken of sliced and whole nodule surfaces and a catalogue was produced to tentatively identify fossils present and illustrate the variations seen within nodules.
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10

Sinuka, Sikhulule. "Heavy mineral characterization and provenance interpretation of the Ecca Group of geological formations in Eastern Cape Province, South Africa." Thesis, University of Fort Hare, 2016. http://hdl.handle.net/10353/2911.

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The aim of the research focuses on characterizing heavy mineral assemblages and interpretation of the provenance of the Ecca Group of in the Eastern Cape Province, South Africa. In South Africa, the Ecca Group outcrops extensively in the Main Karoo Basin. Mudstone, siltstone, sandstone, minor conglomerate and coal are the major constituent lithologies within the group. For descriptive purposes, the Ecca is categorized into three different geographical areas: the southern area, the western and northwestern area and the northeastern area. Six of the sixteen geological formations, namely the Prin
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11

Fraser, Nicholas Tweedie. "A Metamorphic Study of Pretoria Group Sediments Found at the Dwarsrivier Pass, Bushveld Igneous Complex, South Africa." Diss., University of Pretoria, 2019. http://hdl.handle.net/2263/76009.

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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 rock which is light in colour and identified as a calc-silicate. The calc-silicate material is present as a package of rock and is surrounded top and bottom by pyroxenite. The surrounding rock belongs to the Bushveld Igneous Complex (BIC), which is the largest known layered intrusion on the planet and is host to numerous mines. The sample area is within the Critical Zone o
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12

Reid, Mhairi. "Taphonomy, palaeoecology and taxonomy of an ophiuroid-stylophoran obrution deposit from the Lower Devonian Bokkeveld Group, South Africa." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25404.

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The Lower Devonian Voorstehoek Formation is a fossil-rich, siliciclastic unit (Ceres Subgroup, Bokkeveld Group, Cape Supergroup) in South Africa. This Emsian unit contains a highly endemic benthic fossil biota characteristic of the cool to cold water Malvinokaffric Realm of southwestern Gondwana. The palaeontological and sedimentological investigations of the Voorstehoek Formation suggest that deposition took place in a shallow marine environment within the storm influenced, proximal part of an offshore transition zone. A relatively diverse, ophiuroid–stylophoran assemblage, well-preserved in
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13

Nguema, Mve Oliver Patrice. "Petrology, geochronology and provenance of the Laingsburg and Tanqua Karoo submarine fan systems, Ecca Group, South Africa." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2018.

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Thesis (MSc (Earth Sciences))—University of Stellenbosch, 2005.<br>The integration of whole-rock chemistry, heavy mineral chemistry, detrital zircon morphology and age dating has enabled high-resolution characterization of the Permian Laingsburg and Tanqua submarine fan provenance in the Karoo Basin, upper Ecca Group, South Africa. Geochemically, the Laingsburg and Tanqua sandstones are classified as greywacke and litharenite. The chemical index of alteration values for these sandstones suggest low to moderately weathered sources and a relatively cold climate. Abundant angular clastic g
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14

Oghenekome, Monica Enifome. "Sedimentary environments and provenance of the Balfour Formation (Beaufort Group) in the area between Bedford and Adelaide, Eastern Cape Province, South Africa." Thesis, University of Fort Hare, 2012. http://hdl.handle.net/10353/d1004354.

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The research examines the sedimentary environments and provenance of the Balfour Formation of the Beaufort Group (Karoo Supergroup) in the Eastern Cape Province, South Africa. This Formation occurs in the southeastern part of the Karoo Basin. It consists of sedimentary rocks, which are an alternating siltstone, shale and mudstone succession with subordinate interbedded sandstone and subsequently intruded by Karoo dolerite in the form of sills and dykes. ithostratigraphically, the Balfour Formation is subdivided into five units namely, from the base to the top, the Oudeberg, Daggaboersnek, Barb
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15

Chere, Naledi. "Sedimentological and geochemical investigations on borehole cores of the Lower Ecca Group black shales, for their gas potential : Karoo basin, South Africa." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/d1021201.

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In the recent years, the shale gas discourse has become central to discussions about future energy supply in South Africa. In particular, the Permian black shales of the Lower Ecca Group formations in the Karoo Basin are considered potential source rocks for shale gas. The research presented in this thesis advances the understanding of the shale gas potential of mainly the Prince Albert, Whitehill and Tierberg/Collingham Formations. These shale sequences were sampled from eight deep boreholes spread across the main Karoo Basin and geochemically analysed at the GFZ - Helmholtz Centre Potsdam, G
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16

Baiyegunhi, Christopher. "Sedimentary, geochemical and geophysical study of the Ecca group, Karoo supergroup and its hydrocarbon potential in the Eastern Cape Province, South Africa." Thesis, University of Fort Hare, 2017. http://hdl.handle.net/10353/4881.

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The Ecca Group of Karoo Supergroup is a sedimentary rock sequence that deposited between the Late Carboniferous (Dwyka Group) and the Late Permian-Middle Triassic (Beaufort Group). The Ecca Group investigated in this study is situated in the Eastern Cape Province of South Africa and it comprises mainly of shales, mudstones, siltstones and sandstones. The Ecca Group sequence contains considerable carbon content and suitable thickness to make it an ideal target for shale gas exploration. Previous studies put more emphasis on the geology and stratigraphy of the Ecca Group, this study revised the
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17

Katemaunzanga, David. "Lithostratigraphy sedimentology and provenance of the Balfour Formation Beaufort Group in the Fort Beaufort Alice area Eastern Cape Province South Africa." Thesis, University of Fort Hare, 2009. http://hdl.handle.net/10353/274.

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A traverse through the Balfour Formation was chosen in the area around the towns of Fort Beaufort and Alice in the Eastern Cape Province. The main objectives of the study were to map the lithological variations within the Balfour Formation and to distinguish it from the underlying Middleton Formation and the overlying Katberg Formation. A combined desktop, field and laboratory approach was used in this study. Aerial photographs, satellite images and digital topographical maps formed the basis of the desktop work. After desktop mapping, a number of field traverses were measured through the stud
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18

Harrison, Bianca. "Palaeoenvironments and position of the Precambrian–Cambrian boundary within the lower Vanrhynsdorp Group of South Africa: sedimentary facies analysis, U-Pb series zircon geochronology and micropalaeontology." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29450.

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The Vanrhynsdorp Group is a mainly fluvio-marine siliclastic succession that outcrops in the northwestern part of South Africa. The critical Precambrian-Cambrian boundary falls within the group, however the depositional environments across the boundary, its exact stratigraphic position and nature are unresolved. The group was deposited in the Vanrhynsdorp Basin, which has been shown to be the southernmost extension of the Nama Foreland Basin. Consequently, the Vanrhynsdorp Group has been correlated with the world-famous Nama Group, which features diverse Ediacaran-Cambrian fossils. To date, no
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19

Sciscio, Lara. "Position of the Triassic-Jurassic boundary in South Africa and Lesotho : a multidisciplinary approach aimed at improving the chronostratigraphy and biostratigraphy of the Elliot Formation, Stormberg Group." Doctoral thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20847.

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The continental red bed succession of the main Karoo Basin in South Africa and Lesotho, the Elliot Formation (Stormberg Group, Karoo Supergroup), is a significant stratigraphic unit for the regional and global understanding of the Late Triassic - Early Jurassic evolution of terrestrial vertebrate faunas, however, the temporal resolution of its biostratigraphy is inadequate for detailed regional and global correlations. The main aim of this dissertation is to build a more comprehensive chronostratigraphic framework of the Late Triassic - Early Jurassic Elliot Formation by combining and constra
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20

Van, Lente Belinda. "Chemostratigraphic trends and provenance of the Permian Tanqua and Laingsburg depocentres, southwestern Karoo Basin, South Africa." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16075.

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Thesis (PhD)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: Foreland basins commonly fill with sediment derived from the adjacent fold/thrust belt, providing a relatively simple source-to-basin configuration. However, that is not true for the early southwestern Karoo Basin, since the composition of the Ecca Group sedimentary rocks do not match the composition of the adjacent fold/thrust belt. The southwestern Karoo Basin is bordered to the west and south by the Cape Fold Belt (CFB) and provides the opportunity to study the linkage between its early structural evolution and depos
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21

Campbell, Stuart Alexander. "The Ecca type section (Permian, South Africa) : an outcrop analogue study of conventional and unconventional hydrocarbon reservoirs." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018199.

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The Karoo Basin of South Africa holds an estimated 906 billion to 11 trillion cubic meters of unconventional shale gas within the shales of the Whitehill and Collingham formations of the Ecca Group. Evaluation of this potential resource has been limited due to the lack of exploration and a scarcity of existing drill core data. In order to circumnavigate this problem this study was undertaken to evaluate the potential target horizons exposed in outcrops along the southern portion of the Karoo Basin, north of Grahamstown in the Eastern Cape Province. Detailed field logging was done on the expose
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22

Van, der Merwe Willem C. "Stratigraphy and facies architecture of the uppermost fan system in the Tanqua sub-basin, Permian Ecca Group, South Africa." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50454.

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Thesis (MSc)--Stellenbosch University, 2005.<br>ENGLISH ABSTRACT: Fan System 5 forms the uppermost submarine fan system of the Permian-age Tanqua Fan Complex (Ecca Group) of the southwestern Karoo Basin. It is the most widespread system and represents the final phase of fan deposition in the Tanqua sub-basin. Depositional characteristics differ markedly from the rest of the fan systems, mainly because it lacks sedimentary features indicative of a single point source basin floor fan. The entire system consists of six different stages of fan growth and development in the lower slope settin
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Gulliford, Alice Rachel. "Controls on river and overbank processes in an aggradation-dominated system : Permo-Triassic Beaufort Group, South Africa." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/controls-on-river-and-overbank-processes-in-an-aggradationdominated-system-permotriassic-beaufort-group-south-africa(63893677-9b23-4f07-8405-627354fb170a).html.

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The Permo-Triassic lower Beaufort Group fluvial deposits extend over 100s of kilometres within the Karoo Basin, South Africa. A detailed study of the depositional architecture and stacking patterns of sand bodies within a 900 m thick succession has enabled interpretation of the controls on ancient river channel and overbank processes. Facies include very fine- to medium-grained sandstone, intra-formational conglomerate, mudstone and palaeosols. Channel-belts are dominated by upper flow regime structures, consistent with a flashy to ephemeral fluvial system. The overbank deposits comprise splay
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24

Sonwa, Cyrille Stephane Tsakou. "Analysis of the structural geology of the high-grade metamorphic rocks in part of the Kakamas terrane of an area adjacent to the Neusspruit shear zone South of the orange river, Northern Cape, South Africa." University of the Western Cape, 2021. http://hdl.handle.net/11394/8257.

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>Magister Scientiae - MSc<br>The Proterozoic Namaqua-Natal Province comprises highly deformed rocks of medium to high grade metamorphism and is bordering the Archean Kaapvaal Craton to the west, south and east in South Africa. The sector to the west of the Craton, namely the Namaqua Sector, is structurally complex and subdivided from west to east into the Bushmanland Subprovince, the Kakamas and Areachap terranes of the Gordonia Subprovince and the Kheis Subprovince. The prominent Neusberg Mountain Range, with exposures to the north and south of the Orange River in the Kakamas Terrane constitu
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Le, Roux Anso. "The vegetation ecology of the Witteberg and Dwyka Groups south of Worcester, Western Cape Province, South Africa." Thesis, 2018. http://hdl.handle.net/10500/24852.

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The vegetation supported by the Witteberg and Dwyka Groups south of Worcester is a diverse mosaic of fynbos-, renosterveld- and succulent karoo vegetation units sustained by a winter-rainfall pattern. Elytropappus rhinocerotis (renosterbos) dominated plant communities are found on finer grained soils derived from the various mudrock-dominated formations of the Witteberg Group, a Passerina truncata (gonnabos) dominated shrubland with large Protea shrubs and / or small Protea trees where the substrate is largely influenced by the sandstone-dominated formations of the Witteberg Group, a gr
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Cloete, Marthinus. "Aspects of volcanism and metamorphism of the Onverwacht group lavas in the South-Western portion of the Barberton greenstone belt." Thesis, 1994. http://hdl.handle.net/10539/22828.

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A Dissertation Submitted to the Faculty of Science; University of the Witwatersrand, Johannesburg; for the Degree of Doctor of Philosophy<br>A volcanological study of the Onverwacht Group in the southwestern part of the Archaean (-3.5 - 3.2 Ga) Barberton greenstone belt (BGB), South Africa, shows that volcanic extrusion rates of the Komati and Hooggenoeg Formations must have been high to have maintained the degree of submarine sheet flooding that is evident. It is concluded that the volcanic attributes of the Komati and Hooggenoeg Formations are not typical of MOR crust, as has been cla
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27

Bosch, P. J. A. "Die geologie van die Wolkberg Groep tussen die Abel Erasmuspas en Graskop, Oos-Transvaal." Thesis, 2014. http://hdl.handle.net/10210/11709.

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Clay, Andrew Neil. "The geology of the Malmani Dolomite Sub-Group in the Carletonville area, Transvaal." Thesis, 2015. http://hdl.handle.net/10539/16934.

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Nhleko, Noah. "Stratigraphy of the Archean Mozaan Group in the Kubuta-Mooihoek area, Swaziland." Thesis, 2012. http://hdl.handle.net/10210/6405.

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M.Sc.<br>Known outcrops of the supracrustal Mesoarchean Mozaan Group of the Pongola Supergroup occur in north-eastern Kwazulu-Natal and southern Mpumalanga in South Africa, and southern Swaziland. Outcrops of the Mozaan succession in Swaziland are preserved in the Ntungulu-Mahlangatsha and Kubuta-Mooihoek areas. The succession is composed of polymictic conglomerate, poorly sorted scour based quartzite, orthoquartzite, shale, iron-formation, polymictic diamictite and lava. In the Kubuta- Mooihoek area a 3000m thick succession is preserved and correlates almost bed for bed with that in the Hartl
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30

Day, Michael Oliver. "Middle Permian continental biodiversity changes as reflected in the Beaufort Group of South Africa: a bio-and lithostratigraphic review of the Eodicynodon, Tapinocephalus and Pristerognathus assemblage zones." Thesis, 2014.

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The fluvio-lacustrine rocks of the Beaufort Group, South Africa have long been known for their tetrapod fossil record, which is the richest and most complete Middle Permian to Middle Triassic record for any terrestrial sequence in the world. The abundance of fossil material has enabled the Beaufort Group to be biostratigraphically subdivided into between 8 and 10 tetrapod assemblage zones, of which the lowest three (Eodicynodon, Tapinocephalus and Pristerognathus) are attributed to the Middle Permian. These lower assemblage zones record the earliest therapsiddominated faunas and, becaus
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McClung, Craig Randall. "Basin analysis of the Mesoproterozoic Bushmanland group of the Namaqua Metamorphic Province, South Africa." Thesis, 2008. http://hdl.handle.net/10210/610.

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The Mesoproterozoic Bushmanland Subprovince of northwestern South Africa forms the western continuation of the transcontinental Namaqua-Natal Metamorphic Province, a crustal domain affected by the 1020-1220 Ma Namaquan Orogeny. Cross-cut by several large faults, the Bushmanland Subprovince can be subdivided into a southern Garies Terrain and northern Aggeneys Terrain. The supracrustal rocks of the Aggeneys Terrain (i.e. Bushmanland Group), comprise a thin (<1 km thick) metavolcano-sedimentary succession composed of a very consistent, shallow marine duplex of sandstone-shale to chemogenic metas
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Coetzee, Louis Lodewyk. "Genetic stratigraphy of the paleoproterozoic Pretoria Group in the Western Transvaal." Thesis, 2009. http://hdl.handle.net/10210/1954.

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M.Sc.<br>The sedimentary succession of the Paleoproterozoic Pretoria Group is very important for understanding Earth’s ancient history. It represents a time of extreme environmental changes on Earth, from global ice-ages to hot-houses. However, the genetic stratigraphy of the succession is poorly understood so that the stratigraphic relationships between the events remain uncertain. This dissertation provides a genetic stratigraphic model of the succession by utilising an integrated sedimentological and geochemical approach which culminates in a new sequence stratigraphic subdivision of the Pr
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33

Fourie, Pieter Hugo. "Provenance and Paleotectonic setting of the Devonian Bokkeveld Group, Cape Supergroup, South Africa." Thesis, 2012. http://hdl.handle.net/10210/4331.

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M.Sc.<br>The Lower Devonian Bokkeveld Group is the Middle unit of the tripartite Cape Supergroup, which outcrops along the western, southern and eastern coastline of South Africa. A well-established sedimentary and stratigraphic understanding of the Bokkeveld Group allowed for geochemical and geochronological investigation in order to gain insight into the provenance characteristics, as well as the paleotectonic environment of the provenance areas. In order to observe any changes within the Bokkeveld Basin, complete profiles for geochemical investigation were sampled in the western, southern a
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McCutcheon, Shauna. "Platinum-group mineral assemblages in the Platreef on Tweefontein, Northern Bushveld complex, South Africa." Thesis, 2013. http://hdl.handle.net/10539/12377.

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The Platreef occurs at the base of the Northern Limb of the Bushveld Complex and is variably mineralised with PGE, Cu, and Ni. The Platreef varies in thickness from a few meters to a few hundred meters and rests on progressively older sediments of the Transvaal Supergroup and Archaean granite basement northwards. Recent studies have highlighted the importance of magmatic processes, contamination of the magma by footwall rocks and syn- and post metasomatic fluid activity on the observed mineralisation. Along the Platreef strike, the PGE grade profiles are generally top-loaded from Overysel to
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Schaefer, Markus Olaf. "Paleoproterozoic Mississippi Valley-Type Pb-Zn deposits of the Ghaap Group, Transvaal Supergroup in Griqualand West, South Africa." Thesis, 2009. http://hdl.handle.net/10210/1969.

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Green, Dawn. "Palaeoenvironments of the Estcourt formation (Beaufort Group), KwaZulu-Natal." Thesis, 1997. http://hdl.handle.net/10413/4871.

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At present the Karoo Basin covers approximately 20 000 km2. It is a large intracratonic basin which, from Carboniferous to Jurassic times, was infilled with a succession of sediments ranging from glacial deposits to those deposited in warm, equable conditions. The Beaufort Group forms part of this succession, and was deposited in a terrestrial, river dominated environment. The dominant lithologies exposed in the Estcourt region in the KwaZulu-Natal Midlands belong to the lower and middle Beaufort divided by the PermoTriassic boundary. The Permo-Triassic palaeoenvironment in this region is reco
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"A geometallurgical characterization of the Vaal Reef - a facies at Moab Khotsong Mine, AngloGold Ashanti, with specific focus on gold and uranium deportment." Thesis, 2015. http://hdl.handle.net/10210/13708.

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M.Sc. (Geology)<br>The Witwatersrand Supergroup is host to a number of auriferous and uraniferous conglomeratic reefs, which have been extensively exploited along the Witwatersrand Basin margins. The current study investigates the Vaal Reef, in the Klerksdorp gold field with particular focus on conducting a geometallurgical characterization of the ore which may ultimately enhance the recovery of gold and uranium and our understanding of how the ore responds to processing. Six samples were collected from AngloGold Ashanti’s Moab Khotsong mine and prepared for a chemical and mineralogical deport
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38

Cole, Edward George. "Lithostratigraphy and depositional environment of the Archaean Nsuze Group, Pongola Supergroup." Thesis, 2014. http://hdl.handle.net/10210/11447.

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39

Dorland, Herman Christiaan. "Paleoproterozoic laterites, red beds and ironstones of the Pretoria group with reference to the history of atmospheric oxygen." Thesis, 2012. http://hdl.handle.net/10210/6127.

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M.Sc.<br>The evolution of oxygen in the Earth's atmosphere during the early Precambrian has been a subject of debate for many years. Two fundamental models oppose another. The one by Cloud, Holland and co-workers suggests that the atmosphere was essentially anoxic until about 2.2Ga and then became highly oxygenated due to a sudden rise in oxygen levels. The, other advocated by Dimroth, Kimberley and Ohmoto suggests that the atmosphere was oxygenated as early as 3.5Ga. The most crucial assumption for the Cloud-Holland model for the evolution of atmospheric oxygen is that the 2.2-2.3Ga Hekpoort
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40

Appiah-Nimoh, Frederick. "A geological study of the Platreef at Potgietersrus platinum mine with emphasis on the magmatic processes, contamination and metasomatism." Thesis, 2009. http://hdl.handle.net/10210/1946.

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41

"MLA-based mineralogical investigation of PGE mineralisation at Lonmin's Akanani Platinum Group Metal Project, Northern Limb of the Bushveld Complex." Thesis, 2012. http://hdl.handle.net/10210/5069.

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