Browsing Research Articles (Earth Sciences) by Title
Now showing items 1-17 of 17
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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 ... -
Correlation between knowledge of HIV, attitudes and perceptions of HIV and a willingness to test for HIV at a regional hospital in KwaZulu-Natal, South Africa
(AOSIS Publishing, 2012-07)Background: With millions of South Africans infected with human immunodeficiency virus (HIV) and less than 10% of the population aware of their HIV status, HIV counselling and testing (HCT) is the first step in any attempt ... -
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 ... -
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 ... -
Diversity of burial rates in convergent settings decreased as Earth aged
(Springer Nature, 2016)The evolution and the growth of the continental crust is inextricably linked to the evolution of Earth’s geodynamic processes. The detrital zircon record within the continental crust, as well as the isotopic composition ... -
The emergence of modern sea ice cover in the Arctic Ocean
(Springer Nature, 2014-07)Arctic sea ice coverage is shrinking in response to global climate change and summer ice-free conditions in the Arctic Ocean are predicted by the end of the century. The validity of this prediction could potentially be ... -
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 ... -
A global compilation of over 13 000 dissolved iron measurements : focus on distributions and processes in the Southern Ocean
(Copernicus Publications, 2011-11)Due to its importance as a limiting nutrient for phytoplankton growth in large regions of the world’s oceans, ocean water column observations of concentration of the tracemetal iron (Fe) have increased markedly over ... -
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 ... -
Influence of water availability in the distributions of branched glycerol dialkyl glycerol tetraether in soils of the Iberian Peninsula
(European Geosciences Union, 2014)The combined application of the MBT (degree of methylation) and CBT (degree of cyclization) indices, based on the distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in soils, has been proposed as a ... -
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 ... -
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 ... -
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 ... -
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 ... -
Southern Ocean Seasonal Cycle Experiment 2012 : seasonal scale climate and carbon cycle links
(Academy of Science of South Africa, 2012-03-28)In early May 2012, South Africa will take delivery of a new polar research ship, the SA Agulhas II, representing a significant investment of R1.6 billion in polar infrastructure to further strengthen South Africa’s ... -
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 ... -
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 ...
