Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Mineral systems"”.
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Hydration and swelling of clay mineral systems
Typewritten
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Kinetic analysis of leaching reactions in multi-component mineral systems
The rational design of reactive systems requires the use of kinetic models of system behavior. However, the development of such models for multicomponent systems is complicated by conditions of mutual interference in determining reaction rates. Addressing this shortcoming for mineral systems …
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Regolith and associated mineral systems of the Eucla Basin, South Australia.
… documents previous research into the heavy mineral sands (HMS) of the Eucla Basin. It presents new research designed to incorporate previous work, and to then encourage a broadening of research into the future. Specifically, this thesis is dedicated to demonstrating the importance of …
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The Neoproterozoic São Francisco Basin, central Brazil: tectonic evolution, paleoclimate, and mineral systems
… values, chemistry of Ediacaran zircons, and clay mineralogy support this interpretation. The revised stratigraphy of the SFB consolidates its correlation with paleoclimatic events worldwide. Finally, an eolian origin of organic-rich, pyritiferous siltstone provides a novel control reductants for …
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Multi-scale Hyperspectral Characterisation of Mineral Systems Relevant to CRMs: Integration of Satellite Observations and Laboratory Analysis
L'abstract è presente nell'allegato / the abstract is in the attachment
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The effect of phyllosilicate mineralogy and surface charge on the rheology of mineral slurries
Phyllosilicate minerals exist as common gangue components in many low grade ores. Often broadly classified as ‘clays’, this group of minerals is closely associated with several processing issues. Despite many good studies on the physico-chemical properties of phyllosilicates, there still remains a …
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Assessing the Potential for Carlin-type Gold in Northern Nye County, Nevada
… regional geologic maps using fuzzy logic-based mineral potential mapping, this study assesses the potential for Carlin-type mineral systems in northern Nye County. Robust factor analysis (FA) is applied to log ratio-transformed stream sediment geochemical data to identify regional mineralogical …
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Degradation of groundwater contaminants by iron containing systems.
Iron-containing systems are effective at reducing common groundwater contaminants. Zero-valent iron particles are an effective remediation technology for groundwater contaminated with halogenated organic compounds. Iron salts were used to generate iron oxide nanoparticles, which were reduced to …
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Hydrophobic Forces in Flotation
… force measurements were conducted between a flat mineral substrate and a hydrophobic glass sphere in aqueous solutions. It is assumed that the hydrophobic glass sphere may simulate the behavior of air bubbles during flotation. The results may provide information relevant to the bubble-particle …
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Ionic Mobility In Stuffed-Silica Minerals
… of loosely bound cations in the stuffed-silica minerals nepheline, yoshiokaite and ß-eucryptite has been investigated. The investigation has been extended to include the feldspar minerals albite, K-feldspar and anorthite. The low-frequency dielectric properties of all of the minerals have been …
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Numerical Modeling and Simulation of Mineral Dissolution in Fractured Carbonate Formations
Mineral dissolution plays important role in many subsurface transport processes including waterflooding, geological CO2 sequestration (GCS), and matrix acidizing in carbonate formations. Such a dissolution process could form the preferential pathways to cause a failure of waterflooding and GCS due …
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The Application of Machine Learning Methods to Portable X-Ray Fluorescence Data: A Case Study from Zwartfontein Farm, Northern Limb of the Bushveld Complex, South Africa
Geological characterisation during mineral exploration and mining operations currently relies on costly laboratory analyses with slow turnaround times and subjective visual logging. These create bottlenecks and bias in decision-making. This thesis demonstrates how a workflow combining compositional …
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Investigating the Influence of the Electrochemical Environment on the Flotation of a Mixed Sulphide Mineral System of Bornite and Chalcocite
… critical front-end process used to remove gangue minerals and concentrate the copper minerals. However, flotation is an electrochemically intense process with multiple redox reactions taking place simultaneously. The interdependency of these processes makes it extremely difficult to isolate the …
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The sorption of uranium(VI) and neptunium(V) onto surfaces of selected metal oxides and alumosilicates studied by in situ vibrational spectroscopy
… as well as the diffusion and sorption onto minerals present along groundwater flow paths. These reactions significantly influence the mobility and bioavailability of the metal ions in the environment, in particular at liquid-solid interfaces. Hence, for the assessment of migration processes …
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A methodology for the heat of immersion as a measure of wettability of mineral mixtures
The measure of the extent to which a mineral interacts with water is called wettability and this is important in flotation processes. This is because the interactions between solid particles and liquid molecules (water) are important in understanding the flotation mechanism and achieving high …
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The relationship between enthalpy of immersion, and its derived wettability parameters, to flotation response
The wettability of mineral surfaces plays an important role in the flotation process. A wettable mineral is hydrophilic while a non-wettable mineral is hydrophobic. In the flotation process, sufficiently hydrophobic particles are collected by rising air bubbles and they report to the concentrate. …