Sökning: "supracrustal rocks"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden supracrustal rocks.

  1. 1. Characterization of mineral parageneses and metamorphic textures in eclogite- to high-pressure granulite-facies marble at Allmenningen, Roan, western Norway

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Stylianos Karastergios; [2020]
    Nyckelord :Western Gneiss Region; Vestranden; Roan; Caledonides; marble; calc-silicate; metabasic; petrography; SEM-EDS; mineral chemistry; mineral equilibrium; P–T estimate; devolatilization; Earth and Environmental Sciences;

    Sammanfattning : The Roan peninsula in western Norway, Vestranden, is known for exposing one of the deepest parts of the Scandinavian Caledonian orogen, similar to the Western Gneiss Region. Throughout the Roan area, eclogites and high-pressure granulite- and amphibolite-facies gneisses occur, associated with supracrustal rocks including marbles, calc-silicate rocks and amphibolites. LÄS MER

  3. 2. Thermal and chemical variations in metamorphic rocks in Nautanen, Gällivare, Sweden

    Magister-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaper

    Författare :Elin Tollefsen; [2014]
    Nyckelord :Nautanen Metamorphism;

    Sammanfattning : This study focuses on the geology of the Nautanen area. It is part of the SGU-financed project, Metamorphic Map of Sweden, which aims to compile metamorphic data from Sweden and takes the form of a number of Bachelor and Master projects. The main metamorphic event in the Nautanen area is the Svecokarelian Orogeny (1.96 – 1. LÄS MER

  4. 3. A lithogeochemical study of northern Sweden and the Kiruna and Malmberget iron-apatite ore deposits

    Master-uppsats, Uppsala universitet/Berggrundsgeologi

    Författare :Jon Lundh; [2014]
    Nyckelord :REE; trace elements; iron-apatite ore deposit; suite; oxygen isotopes; magnetite; Kiruna; Malmberget; Haparanda; Edefors; Perthite-monzonite;

    Sammanfattning : The iron apatite mineralizations of northern Sweden are mainly situated in supracrustal rocks and are thought to have formed during approximately the same time as the major plutonic suites in northern Sweden. In this thesis the Malmberget iron apatite ore deposit have been compared to the Kiruna iron apatite ore deposit to see whether the role of hydrothermal processes are different between the two ore districts. LÄS MER

  5. 4. U-Pb, O and Lu-Hf isotope ratios of detrital zircon from Ghana, West-African Craton : formation of juvenile, Palaeoproterozoic crust

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Bára Dröfn Kristinsdóttir; [2013]
    Nyckelord :Hf-Model ages; West African Craton; detrital zircon; Ghana; crustal growth; Earth and Environmental Sciences;

    Sammanfattning : Detrital zircon were sampled from five rivers in Ghana and they were analysed in situ for U-Th-Pb, O and Lu-Hf isotopes. Based on the analyses, their U-Pb crystallisation ages, δ18O isotope ratio, εHf and Hf-model ages were determined. This provides information about the origin and crustal evolution of the Palaeoproterozoic bedrock in Ghana. LÄS MER

  7. 5. Metamorphosed and partially molten hydrothermal alteration zones of the Akulleq glacier area, Paamut gold province, South-West Greenland

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Magnus Asiboh Tebi; [2011]
    Nyckelord :remobilized gold; South-West Greenland; Paamiut gold province; hydrothermal alteration; sulfide; Paamiut guldprovins; sydvästra Grönland; hydrotermal omvandling; sulfid; Earth and Environmental Sciences;

    Sammanfattning : Området kring akulleqglaciären ligger i närheten av bosättningen Paamiut, sydvästra Grönland. Tonalit- trondhjemit och granodioritgnejser (TTG) utgör huvudlitologin i området. Inom TTG-gnejserna återfinns ett cirka 1 km brett hästskoformat bälte av suprakrustala bergarter. LÄS MER