Sökning: "opaque phases"
Visar resultat 1 - 5 av 8 uppsatser innehållade orden opaque phases.
1. Undersökning av lakningspotential och kristallareafördelning av opaka mineral i bergarter från Ekobacken, Värmdö kommun
Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaperSammanfattning : Ekobacken, Värmdö kommun, har problem med surt yt- och grundvatten med höga metallhalter. Uppmärksamheten har riktats mot berggrunden som krossats och lagrats i deponihögar. Bildningen av sur lak styrs av flertalet geokemiska egenskaper, bland annat vilka sulfidmineral som förekommer och deras kristallstruktur. LÄS MER
2. Temporal evolution of historic mafic lavas from Fogo, Cape Verde
Master-uppsats, Uppsala universitet/Institutionen för geovetenskaperSammanfattning : The volcanic Island of Fogo that is situated near the end of the southern island chain in the archipelago of Cape Verde is one of the most active oceanic volcanoes in the world. The purpose of this study was to investigate temporal variations in lavas from Fogo by using whole rock major and trace elements and describe trends in magmatic differentiation, melting systematics and mantle source compositions. LÄS MER
3. Study of opaque phases in carbonatites of the Grønnedal-Íka alkaline complex, Southwest Greenland
Kandidat-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaperSammanfattning : Opaque phases from carbonatites of the Grønnedal-Íka alkaline complex (1299±17 Ma) of Southwest Greenland were analyzed in terms of their mineralogy and microstructure. The analysis demonstrates that a later intrusion by a 55 m wide dolerite dyke of unknown age has prompted the mineralization of magnetite by activating hydrothermal fluid convection. LÄS MER
4. Mikroskopering av opaka faser - en studie från Skyttgruvan, Falun.
Kandidat-uppsats, Institutionen för geovetenskaperSammanfattning : In nature there are about 4,500 minerals identified. These can roughly be divided into two groups, opaque phases and non-opaque phases, with the exception that some opaque phases also may act as a non-opaque phase in different circumstances. The division is made on the basis of the optical properties. LÄS MER
5. An Experimental Study of Fibre SuspensionFlows in Pipes using Nuclear MagneticResonance Imaging
Master-uppsats, KTH/MekanikSammanfattning : This study deals with fibre suspension flows through cylindrical pipes. Thepresent work aims at measurements of opaque flows, which are common inindustries. Nuclear magnetic resonance imaging (NMRI) and ultrasound velocimetryprofiling (UVP) were employed as non-invasive and optic-independenttools to measure the velocity profiles. LÄS MER