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Development of mineralogical and geochemical exploration techniques for carbonatite-related Nb (±Ta) and REE deposits in the Canadian Cordillera

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dc.contributor.author Mackay, Duncan Alisdair Robert
dc.date.accessioned 2015-04-23T16:54:57Z
dc.date.available 2016-03-27T11:22:08Z
dc.date.copyright 2015 en_US
dc.date.issued 2015-04-23
dc.identifier.uri http://hdl.handle.net/1828/5991
dc.description.abstract Niobium and rare earth elements (REE) are considered as strategic metals in industrialised countries, and are mainly derived from carbonatite-related deposits. Indicator mineral methods for carbonatites using of portable XRF and Quantitative Evaluation of Materials by Scanning Electron Microscopy (QEMSCAN®), shows promise in exploration for Nb and REE. Portable XRF analysis of stream sediments from the Aley, Lonnie, and Wicheeda carbonatites identified 125-250 μm as the ideal size fraction for indicator mineral studies. QEMSCAN® provides (with no additional processing) detection and characterisation of indicator minerals (when found in high concentrations) from carbonatite deposits. Preconcentration by Mozley C800 separator is recommended for sediment samples with low concentrations of indicator minerals. Discrimination diagrams for pyrochlore supergroup and columbite-tantalite series minerals show that minerals from carbonatites occupy the pyrochlore field and extend slightly into the betafite field. Columbite-tantalite series minerals from carbonatites have Mn/(Mn+Fe) atomic ratios ≤0.25 and Ta/(Ta+Nb) ≤0.20. The compositional fields for pyrochlore supergroup and colubmite-tanatlite series minerals from different deposit types partially overlap. en_US
dc.language English eng
dc.language.iso en en_US
dc.rights Available to the World Wide Web en_US
dc.subject Indicator minerals en_US
dc.subject Exploration en_US
dc.subject Carbonatite en_US
dc.subject Specialty metals en_US
dc.subject Niobium en_US
dc.subject Rare earth elements en_US
dc.title Development of mineralogical and geochemical exploration techniques for carbonatite-related Nb (±Ta) and REE deposits in the Canadian Cordillera en_US
dc.type Thesis en_US
dc.contributor.supervisor Simandl, George J.
dc.contributor.supervisor Canil, Dante
dc.degree.department School of Earth and Ocean Sciences en_US
dc.degree.level Master of Science M.Sc. en_US
dc.rights.temp Available to the World Wide Web en_US
dc.description.scholarlevel Graduate en_US
dc.description.proquestcode 0996 en_US
dc.description.proquestcode 0411 en_US
dc.description.proquestcode 0372 en_US


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