Department of Earth Sciences
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Gold exploration in two and three dimensions : improved and correlative insights from microscopy and X-Ray computed tomography
(MDPI, 2020)Abstract: In this contribution, we highlight a correlative approach in which three-dimensional structural/positional data are combined with two dimensional chemical and mineralogical data to understand a complex orogenic ... -
Temperature and monsoon tango in a tropical stalagmite : last glacial- Interglacial climate dynamics
(Nature Research, 2018)High-resolution paleoclimate data on stable isotopes in a stalagmite were coupled to glycerol dialkyl glycerol tetraethers (GDGTs). The Indian Summer Monsoon (ISM) transitioned from limited rainfall during the Last Glacial ... -
Developing protocols for XCT scanning of dense mineral ore samples with applications to geology and minerals processing
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: X-ray computed tomography (XCT) is a non-destructive technique capable of producing 3Dmineralogical and textural information from drill cores. The discrimination between mineralogical information of the ... -
A geometallurgical study of the quartz dominant ore varieties in a polymetallic base metal sulphide deposit, Northern Cape, South Africa
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: Geologically complex deposits require integrated approaches to characterisation, extraction and processing of ores in order to maximise the yield of the deposit. In this study, a complex polymetallic ... -
The application of Radon-222 in constraining zones of recent groundwater recharge in the Table Mountain Group aquifer in the City of Cape Town and its surrounding areas
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: The world’s population is expected to increase by 2.14 billion people by the year 2050, and therefore finding sustainable water resources to satisfy humanity’s water demand has become one of the most ... -
Noble gas and radiocarbon constraints on the residence times of groundwater in and around the City of Cape Town
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: The TMG Aquifer is one of the largest aquifer systems in the country and is currently targeted as a potential source of potable water for the City of Cape Town (CoCT) in times of water stress. This study ... -
Implicit geological modelling of key platiniferous reefs of the main chamber of the Bushveld complex : implications for the complexs structural history
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: The Bushveld Complex (BC) is the world’s largest source of platinum group metals and has been extensively studied for decades. The focus of these studies has typically been its geochemistry, magma and PGM ... -
Geometry and emplacement controls of dolerite sill complexes in the Karoo basin
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: This dissertation is a compilation of three case studies that integrates drilling, field and geophysical data on dolerite sill complexes across the Karoo basin to constrain the emplacement processes, ... -
A hydrogeological study of the Kasteelberg Mountain aquifer, Western Cape, South Africa
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: The availability of freshwater is one of the major factors that are limiting South Africa’s development. With this in mind the area under investigation in this study forms part of the Sandspruit catchment, ... -
Modern-ocean ground-truthing of planktic foraminifer nitrogen isotopes : a proxy for surface ocean nutrient conditions
(Stellenbosch : Stellenbosch University, 2020-04)ENGLISH ABSTRACT: The nitrogen (N) isotope ratios (δ15N) of organic matter trapped within the fossil shells of planktic foraminifera, upper-ocean dwelling zooplankton, are providing a new lens through which to examine the ... -
Investigation of heuweltjie structure and soil chemistry in the Buffels River valley and implications for transfer of salts to groundwater
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: Globally, soil salinization is a major soil degradation problem. Saline soils damage the land by altering various Earth cycles and are especially a threat to farming. Saline soils can cause salts to leach ... -
A mineralogical approach to quantifying ore variability within a polymetallic Cu-Pb-Zn Broken Hill-type deposit and its implications for geometallurgy
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: A detailed two-part mineralogical study was undertaken on a polymetallic Cu-Pb-Zn ore from the Aggeneys-Gamsberg Ore District to quantify which mineral characteristics of the lithological ore types are ... -
Coupled zircon-rutile U-Pb chronology : LA ICP-MS dating, geological significance and applications to Sediment Provenance in the Eastern Himalayan-Indo-Burman Region
(MDPI, 2019-11-05)U-Pb dating by LA ICP-MS is one of the most popular and successful isotopic techniques available to the Earth Sciences to constrain timing and rates of geological processes thanks to its high spatial resolution, good ... -
Working towards an increase in manganese ferroalloy production in South Africa - a research agenda
(Southern African Institute of Mining and Metallurgy, 2018)Although South Africa is endowed with one of the largest land-based deposits of manganese ore, in the order of 80% of the ore mined is exported for beneficiation elsewhere. The past 15 years has seen a decline in the ... -
Characterization of xenotime from Datas (Brazil) as a potential reference material for in situ U-Pb geochronology
(Wiley Online Library, 2018-07-16)This study investigates five megacrysts of xenotime (XN01, XN02, XN03, XN04, and XN05) as potential reference materials (RMs) for U‐Pb geochronology. These crystals belong to a 300 g xenotime assortment, collected from ... -
Introduction to the French GEOTRACES North Atlantic Transect (GA01) : GEOVIDE cruise
(European Geosciences Union, 2018-11-29)The GEOVIDE cruise, a collaborative project within the framework of the international GEOTRACES programme, was conducted along the French-led section in the North Atlantic Ocean (Section GA01), between 15 May and 30 June ... -
Seasonal development of iron limitation in the sub-Antarctic zone
(European Geosciences Union, 2018-07-30)The seasonal and sub-seasonal dynamics of iron availability within the sub-Antarctic zone (SAZ; ∼40–45∘ S) play an important role in the distribution, biomass and productivity of the phytoplankton community. The variability ... -
Estimation of groundwater recharge via percolation outputs from a rainfall / runoff model for the Verlorenvlei estuarine system, West coast, South Africa
(Elsevier, 2018)Wetlands are conservation priorities worldwide, due to their high biodiversity and productivity, but are under threat from agricultural and climate change stresses. To improve the water management practices and resource ... -
Distributive rainfall–runoff modelling to understand runoff-to-baseflow proportioning and its impact on the determination of reserve requirements of the Verlorenvlei Estuarine lake, West coast, South Africa
(European Geosciences Union, 2019-06-24)River systems that support high biodiversity profiles are conservation priorities worldwide. Understanding river ecosystem thresholds to low-flow conditions is important for the conservation of these systems. While climatic ... -
Links between the phytoplankton community composition and trace metal distribution in summer surface waters of the Atlantic Southern Ocean
(Frontiers Media, 2019-06-06)This study assessed changes in the phytoplankton community related to macronutrient and bioactive trace metal distribution in surface waters of the Atlantic sector of the Southern Ocean, between Cape Town and Antarctica ...
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