Department of Earth Sciences
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Dissolved iron in the North Atlantic Ocean and Labrador Sea along the GEOVIDE section (GEOTRACES section GA01)
(2020-02-21)Dissolved Fe (DFe) samples from the GEOVIDE voyage (GEOTRACES GA01, May–June 2014) in the North Atlantic Ocean were analysed using a SeaFAST-picoTM coupled to an Element XR HR-ICP-MS and provided interesting insights on ... -
Die bergplase van Piketberg
(Stellenbosch : Stellenbosch University, 1957-12)AFRIKAANSE OPSOMMING: Voordat die geskiedenis van die berg nagegaan kan word, is dit nodig om 'n breër agtergrond te verkry, en veral te wys op die wyse waaarop Piketberg, sy naam gekry het. Die eerste bewoners van die ... -
Characterizing the fungurume 88 deposit in the tenke fungurume mining district: an unusual, high-grade, primary cobalt sulphide deposit
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: The Tenke Fungurume Mining (TFM) district, situated in the northern parts of the Central African Copperbelt (CACB), exhibits one of the most renowned clusters of sedimentary stratiform ... -
Southern African dust characteristics and potential impacts on the surrounding oceans
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: This study supports understanding the potential impact of dust aerosols from southern Africa have on the proximal ocean ecosystems. Dust can release essential nutrients and thus fertilize the ocean, ... -
Potential impacts of climate change on groundwater recharge in South Africa using stable isotopes of water
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Unimodal wet season precipitation plays a significant role in ensuring sustainable and continuous replenishment of groundwater resources, especially in arid to semi-arid climates that only ... -
Evaluating the application and limitations of element to mineral conversion to predict modal mineralogy: the development of a framework for its application
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: The quantification of modal mineralogy has become increasingly important in the modern mining industry due to active mines being forced into mining lower-grade and mineralogically more ... -
Using stable isotopes to understand relative contributions of evaporation and evapotranspiration on groundwater recharge in the Verlorenvlei catchment, west coast, South Africa
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: In Southern Africa, especially in arid and semi-arid regions, there has been an increase in dependency on groundwater resources for both domestic and agricultural supplies. This has been ... -
Controls of hydrothermal fluid flow and gold mineralization in the Sheba-Fairview Complex, Barberton Greenstone Belt, South Africa
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: The Barberton Greenstone Belt hosts high-grade gold-quartz-sulphide-carbonate orebodies where more than 350 ton of gold has been mined over 130 years. Some of the top gold-producing mines are located ... -
The distribution of dissolved molybdenum along the 30˚ E meridian (GEOTRACES Process Study (GIpr07)): First assessment of the factors affecting its behaviour in the African sector of the Southern Ocean
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Molybdenum (Mo) is considered an essential micronutrient owing to its vital role as a cofactor of enzymes facilitating the nitrogen metabolism in phytoplankton. Owing to its unreactive nature in seawater, ... -
An investigation of archean and paleoproterozoic metamorphic processes in the Limpopo belt via detailed analysis of reaction textures in metapelites from the Bandelierkop Formation, Southern Marginal Zone of the Limpopo belt
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: The well exposed granulite facies rocks in the Southern Marginal Zone (SMZ) of the Limpopo Belt (LB), South Africa, represent an exceptional window into the lower crust where partial melting ... -
Processes of fault-controlled fluid-flow, alteration and gold mineralization at Sheba Mine, Barberton Greenstone Belt, South Africa
(Stellenbosch : Stellenbosch University, 2021-11-09)ENGLISH ABSTRACT: Gold mineralization at Sheba Mine, the highest producing mine of the Sheba-Fairview Complex (SFC) and the Barberton Greenstone Belt, is associated with distinct shear zones and faults hosted in distinct ... -
Regulation of the phytoplankton heme b iron pool during the North Atlantic spring bloom
(Frontiers Media, 2019-07-11)Heme b is an iron-containing co-factor in hemoproteins. Heme b concentrations are low (<1 pmol L⁻²) in iron limited phytoplankton in cultures and in the field. Here, we determined heme b in marine particulate material (>0.7 ... -
Isotopic and elemental ratios to assess the relationship between heuweltjies and saline groundwater in the Northern Cape of South Africa.
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Globally, groundwater is becoming one of the most important resources. This is specifically the case in semi-arid to arid southern Africa where surface water resources are limited. In the Buffels River ... -
Developing a 3D mineral texture quantification method of drill core for geometallurgy
(Southern African Institute of Mining and Metallurgy, 2019-04)Mineral texture is a critical factor which controls ore variability and is an important attribute in geometallurgy. In relation to downstream processes, it affects the fracture pattern during breakage, where rock strength ... -
Developing autonomous observing systems for micronutrient trace metals
(Frontiers Media, 2019-02-21)Trace metal micronutrients are integral to the functioning of marine ecosystems and the export of particulate carbon to the deep ocean. Although much progress has been made in mapping the distributions of metal micronutrients ... -
Atmospheric deposition fluxes over the Atlantic Ocean : a GEOTRACES case study
(Copernicus Publications, 2019-04-11)Atmospheric deposition is an important source of micronutrients to the ocean, but atmospheric deposition fluxes remain poorly constrained in most ocean regions due to the limited number of field observations of wet and dry ... -
Inputs and processes affecting the distribution of particulate iron in the North Atlantic along the GEOVIDE (GEOTRACES GA01) section
(Copernicus Publications, 2019-04-12)The aim of the GEOVIDE cruise (May–June 2014, R/V Pourquoi Pas?) was to provide a better understanding of trace metal biogeochemical cycles in the North Atlantic Ocean. As marine particles play a key role in the global ... -
Temporal effects of biochar and dairy manure on physicochemical properties of podzol : Case from a silage-corn production trial in boreal climate
(MDPI, 2019-08-16)A field experiment was conducted to evaluate the effects of biochar and dairy manure (DM) on physicochemical properties of podzolic soils, as well as to establish the relationships between selected physicochemical properties ... -
The chemical controls on native gold within the mineralised regions of the flat structure, Sheba mine
(Stellenbosch : Stellenbosch University, 2021-04)ENGLISH ABSTRACT: Petrographic and geochemical data from the Flat Structure within the Sheba mine indicate phase separation and subsequent pH decrease related to pressure decreasing as the principal factors controlling ... -
Characterization of coloured gemstones by X-ray micro computed tomography
(MDPI, 2021-02-08)The monetary value of gemstones is based on five variables: rarity, cut, weight, color and clarity. The latter refers to internal impurities and defects. Fashion may also dictate demand and price. To enhance some of these ...
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