Sökning: "monazite geochronology"

Hittade 3 uppsatser innehållade orden monazite geochronology.

  1. 1. The Metamorphic History of the Helags Mountain Area, Scandinavian Caledonides

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Sara Johansson; [2016]
    Nyckelord :Seve Nappe Complex; Scandinavian Caledonides; metamorphism; monazite geochronology; garnet;

    Sammanfattning : The Scandinavian Caledonides formed as a result of collision between the continents Baltica and Laurentia, in Silurian and Early Devonian time. The evolution of the orogen has been a topic of research since before the turn of the last century. LÄS MER

  3. 2. Metamorphic record of monazite in aluminous migmatitic gneisses at Stensjöstrand, Sveconorwegian orogen

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Andreas Olsson; [2016]
    Nyckelord :Monazite; LA-ICP-MS; U-Th-Pb Geochronology; Migmatite; Stensjöstrand; Earth and Environmental Sciences;

    Sammanfattning : Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) has been utilised to investigate the age and chemical composition of two texturally different types of monazite in leucosome and mesosome of polymetamorphic aluminous migmatitic gneisses at Stensjöstrand, Halland. Results of radiometric dating are compared with previously published zircon dates. LÄS MER

  4. 3. U-Pb geochronology and geochemistry of host rocks to the Bastnäs-type REE mineralization in the Riddarhyttan area, west central Bergslagen, Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Wictor Linders; [2016]
    Nyckelord :Riddarhyttan; REE; Metavolcanic rocks; LA-ICP-MS; Zircon; Monazite.; Earth and Environmental Sciences;

    Sammanfattning : The geochronology of felsic metavolcanic rocks hosting the Bastnäs-type rare earth element (REE) mineralization in the Riddarhyttan area in the Bergslagen region, Sweden, was investigated using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) U-Th-Pb on zircon and monazite. U-Pb data from four host rock samples yield dates of 1899 ± 4 Ma (MSWD=2. LÄS MER