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 14 of 14 for “"laser ablation ICP-MS"”.
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A pertographic and geochemical study of selected peridotitic and pyroxenitic xenoliths from the three kimberlite localities in the Lac de Gras region, Northwest Territories, Canada
… trace element abundances were determined using laser ablation ICP-MS. Pressures and temperatures of equilibration were then determined using 'garnet-olivine, garnet-orthopyroxene and trace element geothermobarometers (TNi, Per).
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Investigation of Rhenium's Biogeochemistry
… is not known. To probe this question, I used Laser Ablation ICP-MS to look for correlations between Re signals and those of other elements. My results point to the possibility that Re is incorporated into multiple host phases: sulfides and organic material. Laser Ablation ICP-MS also provided …
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VALIDATION OF AGE AND GROWTH USING MICROCONSTITUENT ANALYSIS OF FISH HARDPARTS
… associated with annulus formation. Using Laser Ablation ICP-MS analysis, we tested for periodicity in hardpart Ca, Cu, P, Sr, Mg, Mn, Zn, and Ba in comparison to the periodicity of annulus zonation (opaque and translucent zones). Initial tests were conducted for black sea bass, a species …
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Magmatic-hydrothermal evolution of the Tuvatu alkalic epithermal Au-Telluride deposit, Viti Levu, Fiji
… and marcasite show distinct enrichments in As. Laser ablation-ICP-MS analysis revealed high As and Au incorporation in a specific stage of arsenic-rich pyrite which contains Au as a lattice-bound ion. This study emphasizes the potential importance of hydrothermal fluid flashing to high-grade Au …
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Boron quantitative analysis and imaging analysis in plants
… Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Also recently, some techniques are being developed by investigators to investigate boron distribution in plants such as Laser Ablation ICP-MS (LA-ICP-MS) and Quantitative Neutron Capture Radiography (QNCR). The hypothesis of this …
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Interpreting environmental change using bivalve shell geochemistry
… microsampling system at the Vrije Universiteit Amsterdam and the University of Michigan, and δ¹⁸O was analysed via ICP-MS. The trace element ratios of S. glomerata shells were analysed via Laser Ablation ICP-MS at the Australian National University. The data from the Pambula Lake and Little …
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Experimental investigation of the fluid driven carbonation of serpentinites and spinel-peridotites: implications for the carbon and trace element cycle in the forearc region of the mantle wedge
… material investigating the reaction mechanisms, timescales and magnitudes of the CO2-H2O-H2-fluid to rock reaction under realistic grain sizes, natural porosity and given texture. Partitioning coefficients for fluid mobile elements between carbonates and COH-fluids are established …
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Interpreting environmental change using bivalve shell geochemistry
… microsampling system at the Vrije Universiteit Amsterdam and the University of Michigan, and δ¹⁸O was analysed via ICP-MS. The trace element ratios of S. glomerata shells were analysed via Laser Ablation ICP-MS at the Australian National University. The data from the Pambula Lake and Little …
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Experimental investigation of the fluid driven carbonation of serpentinites and spinel-peridotites: implications for the carbon and trace element cycle in the forearc region of the mantle wedge
… material investigating the reaction mechanisms, timescales and magnitudes of the CO2-H2O-H2-fluid to rock reaction under realistic grain sizes, natural porosity and given texture. Partitioning coefficients for fluid mobile elements between carbonates and COH-fluids are established …
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A study of the crystal chemistry, cathodoluminescence, geochemistry and oxygen isotopes in Scheelite: application towards discriminating among differing ore-deposit systems
… examined using cathodoluminescence, SEMEDS, LA-ICP-MS and whole-grain stable isotopic analyses. The goal of this study was to assess whether the crystal-chemistry of scheelite (i.e., major, minor and trace elements, stable isotopes, CL response) could be used to distinguish between differing …
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Martian meteorites as windows into planetary volcanism: insights from olivine-phyric shergottite meteorites
… possible to evaluate martian magma plumbing systems through time. In chapter 2, I present a comprehensive investigation of two 1.1 Ma ejection-paired olivine-phyric shergottites, Northwest Africa (NWA) 2046 and NWA 4925. I show that Mg-rich olivine megacrysts in both samples represent phenocrysts …
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Spatial structuring and patterns of connectivity among Antarctic toothfish (Dissostichus mawsoni) stocks in the Southern Ocean: a view through otolith chemistry
… around the Antarctic continent. The primary aims were therefore to determine whether patterns of connectivity between these areas were evident and whether source or sink areas for toothfish existed across its Southern Ocean distribution which would be a key understanding towards effective …