Department of Earth Sciences
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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 ... -
Iron-rich nanoparticles in natural aquatic environments
(MDPI, 2019-05-11)Naturally-occurring iron nanoparticles constitute a quantitatively-important and biogeochemically-active component of the broader Earth ecosystem. Yet detailed insights into their chemical speciation is sparse compared ... -
Role of myrmekites and associated deformation fabrics in controlling development of granitic mylonites in the Pofadder Shear Zone, Southern Namibia
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: The predominantly granitic Pofadder Shear Zone (PSZ) of southern Namibia is a crustal-scale dextral shear zone exhumed from the brittle-ductile transition. A variably deformed megacrystic granite with ... -
Geochronology and isotopic characterisation of LCT pegmatites from the Orange River Pegmatite Province
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: The pegmatites of the Orange River Pegmatite Belt (ORPB) form an extensive, ca. 450km long continuous W-E trending belt extending from Vioolsdrif to Kenhardt in South Africa, with the northern extent ... -
Genesis and evolution of a Neoproterozoic magmatic arc: the cordilleran-type granitoids of the Araçuaí Belt, Brazil.
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: The Araçuaí orogen (SE Brazil) is one of the largest (350,000 km2) and long-lived (ca. 630 – 480 Ma) granitic province in the world. Its wide variety of granitoids recording mid- to lower crustal P - T ... -
A Fundamental study on the effects of cation substitution on the molecular chemistry and surface reactivity of sphalerite
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Sphalerite exhibits multiple flotation responses because of its intricate mineral chemistry which arises from its ability to incorporate different metal impurities. Historical work has focussed largely ... -
Geochemical analysis of stream responses to changes in land development and seasonal variation, Western Cape, South Africa
(Stellenbosch : Stellenbosch University, 2018-11-19)ENGLISH ABSTRACT: It is generally accepted that poor riparian land-use practices, commonly associated with agricultural, urban and industrial sectors, have a negative effect upon the geochemical state of streams. The Western ... -
Structural controls of auriferous reefs at Fairview Mine, Barberton Greenstone Belt, South Africa
(Stellenbosch : Stellenbosch University, 2018-11-19)ENGLISH ABSTRACT: Auriferous shear zone hosted gold mineralization at Fairview Mine, along the central-northwestern margin of the Mesoarchean Barberton Greenstone Belt (BGB), is correlated with regional-scale fluid migration ... -
Phytoplankton variability in the Atlantic and Indian sectors of the Southern Ocean: a biogeochemical approach
(Stellenbosch : Stellenbosch University, 2018-11-16)ENGLISH ABSTRACT: The Southern Ocean is identified as a key component in the global carbon cycle due to a unique combination of physical circulation and biological processes. In light of a predicted changing climate, ... -
Radiometric dating and stratigraphic reassessment of the Elliot and Clarens formations; near Maphutseng and Moyeni, Kingdom of Lesotho, southern Africa
(Stellenbosch : Stellenbosch University, 2018-10-15)ENGLISH ABSTRACT: The Elliot and Clarens formations (Stormberg Group) of the Karoo Supergroup famously preserve not only a dynamic suite of depositional environments spanning the Late Triassic to Early Jurassic, but also ... -
CHEMTAX determination of Southern Ocean phytoplankton distribution and adaption: An observational and experimental study assessing the co-limitation of Light, Iron and other Trace Metals on phytoplankton productivity and community composition.
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: This multi-manuscript study reports an elucidated understanding of the consequences key environmental changes has on phytoplankton community structure, productivity and their acclimation abilities for the ... -
Evolution of the continental crust and significance of the zircon record, a case study from the French Massif Central.
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The formation of the continental crust is a major consequence of Earth di erentiation. Recent advances on this topic bene ted from improvements of analytical techniques enabling in situ measurements of ... -
An experimental investigation of the “fate” of entrained peritectic minerals during adiabatic ascent of S-type granite magmas
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: S-type granites generally display a wide range of trace and major element compositional variation, from tonalitic to leucogranitic compositions. A substantial volume of past research has investigated the ... -
36 Chlorine isotope systematics in saline groundwater in the Buffels River Valley
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: It is typical for coastal aquifers in arid regions to be affected by salinisation, populations in these areas that rely upon groundwater resources are often directly afflicted by this phenomenon. Large ... -
Understanding Mg isotope systematics of variably saline water along the west coast of southern Africa
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Isotope techniques are a highly effective tool for fulfilling critical hydrologic information and are therefore crucial for supporting effective water management. The most frequently used isotopes ...
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