Sökning: "U Pb dating"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden U Pb dating.

  1. 1. Temporal and genetical constraints of the Cu-Co Vena-Dampetorp deposit, Bergslagen, Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Dino Leopardi; [2020]
    Nyckelord :Bergslagen; Vena; Dampetorp; Cu-Co; sulphide melting; Bastnäs-type; cobaltite; arsenopyrite; titanite dating; sulphide mineralization; sulphide re-mobilisation.; Earth and Environmental Sciences;

    Sammanfattning : The Bergslagen Province is known for containing major Zn-Pb-Ag and Zn-Pb-Cu-Ag sulphide mineralizations with associated iron-oxide skarns and a lot of research have focused on understanding them. However, Cu-Co deposits like the Vena-Dampetorp deposit have received less attention. LÄS MER

  3. 2. Geochronology of gneisses adjacent to the Mylonite Zone in southwestern Sweden: evidence of a tectonic window?

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :James Davies; [2020]
    Nyckelord :Geochronology; Hallandian orogeny; Mylonite Zone; Sveconorwegian orogeny; U-Pb; Idefjorden terrane; Eastern Segment; B-Bulan; Brobacka; Earth and Environmental Sciences;

    Sammanfattning : The relationship between the Eastern Segment and Idefjorden terrane prior to the Sveconorwegian orogeny has long been debated. Evidence of a common history is minimal and localised; at the same time, the notion that the Sveconorwegian orogeny formed as a result of a collisional event is also disputed. LÄS MER

  4. 3. Zircon U-Pb constraints on the timing of Sveconorwegian migmatite formation in the Western and Median Segments of the Idefjorden terrane, SW Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Mimmi Ingered; [2019]
    Nyckelord :Sveconorwegian orogen; U-Pb; Zircon; Migmatite; Idefjorden terrane; Earth and Environmental Sciences;

    Sammanfattning : The Western and Median Segments of the Idefjorden terrane have been metamorphosed and migmatized during the Sveconorwegian orogeny (ca. 1 Ga), but the timing of these events between the two segments remains unclear. LÄS MER

  5. 4. Single-Grain Zircon U-Pb Dating and Magnetic Susceptibility of Polish Loess to Determine Late Quaternary Dust Provenance and Paleoclimate

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Alexandra Engström Johansson; [2018]
    Nyckelord :dust provenance; Polish loess; paleoclimate; single-grain zircon U-Pb dating; magnetic susceptibility; härkomstområden för atmosfäriskt stoft; polsk lössjord; paleoklimat; U-Pb datering av zirkoner; magnetisk susceptibilitet;

    Sammanfattning : Windblown mineral dust has accumulated into thick loess layers across the European continent. Loess deposits are valuable paleoclimatic archives as they record climate change on centennial- to glacialinterglacial timescales. LÄS MER

  7. 5. U-Pb datering av zirkon från migmatitisk gnejs i Delsjöområdet, Idefjordenterrängen

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Mimmi Ingered; [2017]
    Nyckelord :Svekonorvegiska orogenesen; Idefjordenterrängen; U-Pb; Migmatit; Zirkon; LA-ICP-MS; Earth and Environmental Sciences;

    Sammanfattning : Under den Svekonorvegiska orogenesen omkristalliserade stora delar av sydvästra Sverige och bildade metamorfa migmatitiska gnejser. I Idefjordenterrängen, väster om Mylonitzonen, har migmatiterna inte daterats och då kunskapen om de metamorfa processerna i området brister kan migmatiterna ge en bättre bild av när metamorfosen skedde. LÄS MER