Gneiss complex of the Skærfjorden region (76°-78°N), North-East Greenland

J.M. Hull, J.D. Friderichsen, J.A. Gilotti, Niels Henriksen, A.K. Higgins, F. Kalsbeek

    Publikation: Bidrag til bog/rapport/konferenceproceedingsKapitel i rapport

    Abstrakt

    The crystalline rocks of the Skærfjorden region are dominated by grey migmatitic orthogneisses with smaller bodies of ultramafic, mafic and metasedimentary lithologies. Archaean rocks (c. 3.0 Ga) have been documented, but crustal additions were predominantly Early Proterozoic (2.0–1.75 Ga) in age, reflecting subduction zone magmatism. FolIowing Early Proterozoic orogenesis and migmatisation, granitic sheets (c. 1.7 Ga) and dolerite dykes were intruded. These intrusive rocks were subsequently deformed and metamorphosed in the Caledonian orogeny (c. 400 Ma). The Skærfjorden region is located in the Caledonian hinterland, where orogen parallel stretching and extension followed an early nappe stage.
    OriginalsprogEngelsk
    TitelGeology of North-East Greenland
    ForlagGrønlands Geologiske Undersøgelse
    Sider35–51
    Antal sider17
    DOI
    StatusUdgivet - 1994

    Publikationsserier

    NavnRapport Grønlands Geologiske Undersøgelse
    ForlagGGU
    Vol/bind162
    ISSN (Trykt)0418-6559
    ISSN (Elektronisk)2597-2944

    Programområde

    • Programområde 4: Mineralske råstoffer

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