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Showing 1 to 20 of 21 for “"trace element analysis"”.
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Trace element analysis of bighorn sheep horns
… from nine locations. The concentrations of eight elements were determined in all samples by inductively coupled argon plasma spectroscopy. Year of horn growth was determined for 154 of the samples. All elements of concentrations varied significantly with respect to location. Some elements varied …
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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
… binocular microscopy was followed by major anti trace element analysis. Major element compositions of individual minerals were determined using a wavelength dispersive electron microprobe, and trace element abundances were determined using laser ablation ICP-MS. Pressures and temperatures of …
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Uncovering the role of biomineralisation in otolith trace element uptake by microstructural and microchemical analysis
… was examined in order to uncover its role in trace element uptake within otolith structures by microstructural and chemical analysis. The mechanism of otolith elemental incorporation, the orientation of aragonite and the organic matrix in otoliths of four marine species were investigated in …
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Petrography and geochemistry of hydrothermal breccias hosted in the Schrikkloof Formation (Rooiberg Group), north of Modimolle, South Africa
… samples were sent for petrography, XRF (major element analysis), ICPMS (trace element analysis), SEM-EDX analysis (ore mineralogy). Geochemical results (REE diagram and Rb vs Nb+Y) suggest that the Schrikkloof Formation was derived from melting of the continental crust and was emplaced in an …
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A low dilution fusion technique for the determination of major, minor and trace elements in Lamproite and Kimberlite samples by X-ray fluorescence spectrometry
… the accurate determination of major, minor and trace elements by x-ray fluorescence spectrometry (XRFS). This method has been used to analyze geological samples of widely varying and unusual composition such as lamproites and kimberlites. The results are shown to be of comparable if not better …
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Paleocene Turbidite Deposition in the Central American Seaway (NW Costa Rica): Geochemical Analysis and Provenance of Detrital Spinel and Clinopyroxene
… sections constrain source areas; geochemical analysis of individual detrital heavy minerals from rock samples give indications of sediment sources and tectonic setting during deposition. This study is a provenance analysis based on (i) semi-quantitative energy-dispersive spectrometry analysis …
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Characterization of the mineralized albitite bodies at Biggejavri, Kautokeino Greenstone Belt, Finnmark, Northern Norway
… automated mineralogy, EPMA, and LA-ICP-MS. Trace elements such as Ni and Cr are highest in amphibole in the high Mg amphibolite from the Biggejavri U-REE occurrence, whereas trace elements such as Ti and V are highest in amphibole from the albitite lenses. Biggejavri displays a unique …
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Trace Elements and Sulfur Isotope Variations in Endowed and Non-Endowed Porphyry Systems of the Dawson Range Mineral Belt, Yukon Territory
… of exploring this area, focusing on select trace elements and sulfur isotope analyses to distinguish between endowed deposits and non-endowed occurrences. The remote location, poor access, and extensive glacial deposits complicate exploration efforts. The study analyzed fifty-six samples …
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Making oceanic plagiogranite bodies by thermal migration: evidence from the Agros transect, Troodos ophiolite, Cyprus
… heavy. This process, thermal migration, whereby elements diffuse in a manner driven by mineral-melt equilibrium within a temperature gradient, should also be apparent as isotopic gradients in a natural transect of differentiated rocks. A spreading center melt lens, with perhaps a near order of …
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Technological, social and economic aspects of gold production and use by the iron age people of Southern Africa
… producing gold artefacts. The second is to use trace element fingerprinting to try to determine which geological deposits were exploited by gold miners of this period. Three assemblages exist that allow these questions to be addressed; Mapungubwe (1 ath - 13th century AD), Great Zimbabwe (12th - …
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Geochemical and Microbial Controls of Groundwater Quality in Northwestern Liberia
… Africa. This research leverages major ion and trace element analysis, Escherichia coli (E. coli) field tests, and high-throughput sequencing of microbial 16S rRNA genes to address these gaps and develop a comprehensive snapshot of groundwater quality in the region surrounding Monrovia, the …
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Petrography and Diagenesis of Cambrian Dolomite in Tabei Uplift, Northern Tarim Basin, China
… cathodoliuminescense microscopy examination, trace element analysis, stable and radiogenic isotopic analysis and fluid inclusion analysis, the dolomites are interpreted as: Type 1 dolomite is microcrystal to very fine-crystalline replacement dolomite associated with mudstone, wackestone and …
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Impact of accessory minerals on the distribution of trace elements in the continental crust: an integrated petrologic and phase equilibria modeling study of migmatites, The
… granites that are depleted in incompatible elements (U, Th, and REE) suggests our understanding of the controls on element distribution during recycling is limited. The behavior of key accessory minerals during partial melting of metasedimentary rocks, is interpreted to impact the …
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Fundamental studies of mixed gas plasmas in ICP-MS
… is widely accepted as the leading technique for trace element analysis. It suffers however, from a range of interferences both spectral and non - spectral which limit the range of analytes and substrates which may be successfully analyzed. This study has investigated the use of mixed gas plasmas …
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Using stable isotopes to trace the movements of ducks in southern Africa
… the utility of the stable isotope technique to trace movements of ducks in southern Africa. I sampled and analysed feathers of ten duck species for stable isotope proportions of Carbon (δ13C), Nitrogen (δ15N) and Hydrogen (δD), from five wetlands (Strandfontein and Barberspan in South Africa, …
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Evaluation of methods for the recovery, chemical and toxicological characterization of trace organics
… the organoleptic and esthetic problems caused by trace organics, although their acute and long-term toxic potential has also been recognized.</p> <p>The overall objective of this investigation was the analytical and toxicological characterization of trace organics recovered concomitantly from …
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Sulfide and Accessory Mineral Assemblages in the Sulfur-Poor Regions of the Stillwater Complex, Montana, USA
… most economic concentrations of platinum-group elements (PGE) in the world, yet the processes involved in the enrichment of these PGE remain unclear. Some researchers propose that the PGE were enriched into sulfide phases through purely magmatic processes, while others postulate that late-stage, …
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Thermobarometry and geochemistry of peridotite xenoliths from the southwestern margin of the Kaapvaal craton, South Africa
… linked to large-scale tectonic processes. Major element P-T results from peridotite xenoliths sampled during Group II kimberlite magmatism (~ 150 Ma), that erupted through the southwestern Proterozoic NamaquaNatal Province record geothermal gradients akin to those of cratonic terranes. In …
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Investigations on the importance of early diagenetic processes for the mineralogical stabilisation and lithification of heterozoan carbonate assemblages : (Oligo-Miocene, Maltese Islands and Sicily)
… phases was determined, as well as the major and trace element composition of the single cement phases. Petrographically three (Sicily) to four (Maltese Islands) cementation phases, two phases of fabric selective and one of non-fabric selective dissolution, one phase of neomorphism and one of …
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Nutritional and toxicological studies on New Zealand mutton bird meat (Puffinus griseus) : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science at Lincoln University
… concentration of twenty two essential and toxic elements including silver (Ag), aluminium (Al), arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), manganese (Mn), lead (Pb), selenium (Se), potassium (K), calcium (Ca), magnesium (Mg), boron (B), iron (Fe), nickel (Ni), sulphur …
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