Sökning: "Sveconorwegian orogen"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden Sveconorwegian orogen.

  1. 1. Structural investigation of ductile deformations across the Frontal Wedge south of Lake Vättern, southern Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Ellinor Halvarsson; [2022]
    Nyckelord :Frontal wedge; deformation zone; Sveconorwegian orogeny; Sveconorwegian Orogen; Eastern Segment; shear-sense indicators; Protogine zone; structural geology; bedrock geology; Earth and Environmental Sciences;

    Sammanfattning : Deformationszonen kallad ”Frontal wedge” är ett system av N-S branta och vertikala deformationszoner i gränsen mellan Svekonorvegiska och Sekorareliska provincen, i södra Sverige. Ursprung av dessa strukturer är inte fullt förstått och under de senaste årtiondena har endast ett fåtal undersökningar gjorts på dessa deformationszoner. LÄS MER

  3. 2. 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

  4. 3. Garnet amphibolite in the internal Eastern Segment, Sveconorwegian Province : monitors of metamorphic recrystallization at high temperature and pressure during Sveconorwegian orogeny

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Tove Hernnäs; [2018]
    Nyckelord :Sveconorwegian; metamorphic petrology; mapping; coronitic metagabbro; microtextures; Eastern Segment; Earth and Environmental Sciences;

    Sammanfattning : The analyzed area exposes a deep underthrusting lower plate of the Sveconorwegian orogen and facilitates studying of an elsewhere hidden portion of the Earth. Petrographic and structural studies of different metamorphic rock types within the southern Eastern Segment, Sveconorwegian Province, Sweden, were carried out to better understand the regional metamorphism and deformation history. LÄS MER

  5. 4. 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

  7. 5. Qualitative and quantitative petrography of meta-mafic rocks at Ölme, in the Eastern Segment of the Sveconorwegian orogen

    Kandidat-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaper

    Författare :Diana Carlsson; [2015]
    Nyckelord :metamorphism; high pressure; amphibolite; granulite; gabbro; metagabbro; garnet-amphibolite; complex coronitic textures; symplectite; Eastern Segment; Transitional section;

    Sammanfattning : Meta-mafic intrusions with an intrusion age of 1.6-0.9 Ga are found along a north-south trend in theTransitional section of the Eastern Segment in Sweden. These intrusions are garnet-bearing and thus anexception to other meta-mafic intrusions found in Sweden. LÄS MER