Lamprophyric dykes in Revdal, Scoresby Land, East Greenland: conflicting field observations and K-Ar age determinations

Poul-Henrik Larsen, Lars Stemmerik, Troels F.D. Nielsen, David C. Rex

    Publikation: Bidrag til tidsskriftArtikelForskningpeer review

    2 Citationer (Scopus)

    Abstrakt

    Field observations on lamprophyric dykes in Revdal, Scoresby Land, suggest a Late Permian age and the dykes would thus represent magmatism related to Permian rifting and basin formation, whereas K-Ar age determinations and chemistry suggest a Tertiary age. It is concluded that the dykes probably are Tertiary and never penetrated Upper Permian sediments due to chilling and fracturing at the base of Upper Permian water rich sediments. The dykes most likely belong to a period of alkaline magmatism that followed the onset of sea floor spreading in this part of the North Atlantic around 55 Ma ago. -Authors

    OriginalsprogEngelsk
    Sider (fra-til)1-9
    Antal sider9
    TidsskriftBulletin of the Geological Society of Denmark
    Vol/bind38
    DOI
    StatusUdgivet - 1990

    Programområde

    • Programområde 3: Energiressourcer

    Fingeraftryk

    Dyk ned i forskningsemnerne om 'Lamprophyric dykes in Revdal, Scoresby Land, East Greenland: conflicting field observations and K-Ar age determinations'. Sammen danner de et unikt fingeraftryk.

    Citationsformater