Sökning: "magnetit"

Visar resultat 6 - 10 av 45 uppsatser innehållade ordet magnetit.

  1. 6. Magnetic Mineralogy of Nb-bearing Carbonatites from Oldoinyo Dili (Tanzania)

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Julia Frejd; [2021]
    Nyckelord :carbonatites; niobium; rare earth elements; Oldoinyo Dili; magnetic properties; karbonatiter; niob; rare earth elements; Oldoinyo Dili; magnetiska egenskaper;

    Sammanfattning : Niobium (Nb) and Rare Earth Elements (REE’s) have in recent years received considerable attention because of their importance to the modern technical industry, and more specifically the enhanced sustainability that comes with them. The main source for Nb and REE’s on Earth are carbonatites and associated alkaline silicate rocks. LÄS MER

  3. 7. Three-dimensional modelling of the Källfallsgruvan iron oxide deposit, Riddarhyttan ore field, Bergslagen, Sweden: Integrating existing and new data to aid understanding of structural controls and mineral exploration

    Master-uppsats, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Edna Spahic; [2021]
    Nyckelord :Three-dimensional modelling; Mineral exploration; Bergslagen; Riddarhyttan ore field; Källfallsgruvan iron-oxide deposit;

    Sammanfattning : The Bergslagen ore province, located in the Fennoscandian shield in the south-central part of Sweden hosts several metallic mineral deposits, one of them being the Källfallsgruvan iron-oxide deposit in the Riddarhyttan ore field, situated in a high-strain shear belt denoted as the West Bergslagen Boundary Zone (WBBZ).  An accurate 3D geological model of the Källfallsgruvan iron-oxide deposit has been generated to aid understanding of the ore body geometries and calculating volume and tonnage. LÄS MER

  4. 8. Magnetitinblandad gjutasfalt : Uppvärmning och avsvalning

    Master-uppsats, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Ludvig Berg; Johannes Wanselius; [2021]
    Nyckelord :magnetit; asfalt; gjutasfalt; uppvärmning; avsvalning; SMMART; FEM; COMSOL Multiphysics; Nordreälvbron;

    Sammanfattning : Uppvärmningen av gjutasfalt har traditionellt sett skett med fossila bränslen. Projektet SMMART undersöker möjligheterna att med inblandning av magnetit i asfaltsmassan kunna nyttja mikrovågsteknik för uppvärmning. Detta examensarbete är uppdelat i två delar. LÄS MER

  5. 9. Search for Preserved Methanogenic Organisms in Ophiolitic Rocks through Lipid Biomarker Analysis – Implications for Astrobiological Explorations

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Alexandra Zetterlind; [2020]
    Nyckelord :ophiolite; deep biosphere; archaea; methanogenesis; chemosynthesis; serpentinite-hosted ecosystems; lipid biomarkers; astrobiology; ofiolit; djupbiosfär; arkeér; metanogener; kemosyntes; serpentinit-drivna ekosystem; lipidbiomarkörer; astrobiologi;

    Sammanfattning : Serpentinization is a metamorphic low-temperature geological process, involving a series of chemical reactions that hydrate ultramafic rocks into serpentines and other minerals such as magnetite and brucite. Moreover, the process produces heavily reducing and highly alkaline fluids together with molecular hydrogen (H2) and methane (CH4), which have the capacity to support chemosynthetic microbial life. LÄS MER

  7. 10. Iron and Oxygen Isotope Signatures of Magnetite in Iron Ore of Kiruna Type

    Master-uppsats, Uppsala universitet/Mineralogi, petrologi och tektonik

    Författare :Malin Andersson; [2020]
    Nyckelord :IOA-deposits; magnetite; SIMS; EBSD; Fe- and O isotopes; laser fluorination;

    Sammanfattning : Stable isotope analysis of iron and oxygen isotopes in magnetite of Kiruna-type from Sweden and Chile have been conducted to further the understanding of the formation, and advance the analysis methods of these deposits. For this, data from SIMS (secondary ion mass spectroscopy), EBSD (electron backscatter diffraction) and triple oxygen analysis (by laser fluorination) are used. LÄS MER