Sökning: "Neoproterozoic"

Visar resultat 1 - 5 av 10 uppsatser innehållade ordet Neoproterozoic.

  1. 1. Unraveling the Tectonic History of the Aurek Metagabbro within the Seve Nappe Complex, Scandinavian Caledonides

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Sabine Rousku; [2021]
    Nyckelord :Scandinavian Caledonides; Seve Nappe Complex; Aurek metagabbro; Kebnekaise Mountains; Zircon U-Pb Geochronology; Thermodynamic modeling; Geochemistry; Skandinaviska Kaledoniderna; Seveskollan; Aurek metagabbro; Kebnekaisebergen; zirkon U-Pb geokronologi; Termodynamisk modellering; Geokemi;

    Sammanfattning : The Scandinavian Caledonides form a mountain range comprising nappe stacks of numerous far-travelled thrust sheets. The thrust sheets consist of diverse lithologies representing pre- and synorogenic sedimentary and igneous rocks subsequently metamorphosed to various degrees, from the Late Neoproterozoic to Middle Devonian. LÄS MER

  3. 2. First-arrival traveltime tomography of active-source data in the Kansanshi copper mine, northern Zambia

    Magister-uppsats, Uppsala universitet/Geofysik

    Författare :Vessela Hobson; [2019]
    Nyckelord :refraction seismics; tomographic inversion; Zambian Copperbelt; copper;

    Sammanfattning : Sedimentary rock-hosted deposits are a major source of copper and cobalt, with the Neoproterozoic central African Copperbelt being among the largest Cu-Co provinces in the world, accounting for around 15% of its copper resource. The deposits occur primarily in the carbonates and siliciclastic sediments overlying the basement, and formed during early diagenesis (around 820 Ma) and late diagenesis/metamorphism during the Pan-African Orogeny (580-520 Ma). LÄS MER

  4. 3. The Neoproterozoic Visingsö Group of southern Sweden : lithology, sequence stratigraphy and provenance of the Middle Formation

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Viktor Ahrenstedt; [2018]
    Nyckelord :Neoproterozoic; Visingsö Group; sequence stratigraphy; provenance; lithology; Earth and Environmental Sciences;

    Sammanfattning : The depositional setting of the Neoproterozoic Visingsö Group has long been a subject of discussion. This study aims to provide additional insights into the lithological composition and provenance of the sediments and to provide a sequence stratigraphic framework in order to define the depositional setting. LÄS MER

  5. 4. Depositional history of the Neoproterozoic Visingsö Group, south-central Sweden

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Viktor Ahrenstedt; [2017]
    Nyckelord :sedimentology; depositional history; Visingsö Group; Neoproterozoic; Earth and Environmental Sciences;

    Sammanfattning : The Neoproterozoic sedimentary rocks of the Visingsö Group are one of few remaining rocks from this time. They provide a vital clue to understanding how the landscape looked at this time. The various environmental factors that prevailed and affected deposition are key to paint a bigger picture. LÄS MER

  7. 5. Structural analysis of the hinge region of the Islay Anticline.

    Kandidat-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaper

    Författare :Elin Rydeblad; [2016]
    Nyckelord :Geology; structural geology; Islay; anticline; fluid flow;

    Sammanfattning : The hinge region of a major anticlinal fold structure in the SW Scottish Highlands was located in the eastern part of the Isle of Islay. The structure plunges gently NNW, with the hinge line measuring 02/026. LÄS MER