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Cross-border correlations showing diachronous lithostratigraphic units in the southeastern North Sea Basin during the Early Oligocene (middle-late Rupelian)

Munsterman, Dirk K. ; Deckers, Jef

Netherlands Journal of Geosciences, 2024-05, Vol.103, Article e11

Cambridge, UK: Cambridge University Press

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  • Título:
    Cross-border correlations showing diachronous lithostratigraphic units in the southeastern North Sea Basin during the Early Oligocene (middle-late Rupelian)
  • Autor: Munsterman, Dirk K. ; Deckers, Jef
  • Assuntos: Age ; Boom and Eigenbilzen formations (B) ; Boom and Steensel members (NL) ; Boreholes ; Clay ; Correlation ; Dinoflagellate cyst analysis ; Gamma rays ; Geology ; geophysical logs ; Oligocene ; Original Article ; Palynology ; Radioactive wastes ; Sedimentary facies ; Sediments
  • É parte de: Netherlands Journal of Geosciences, 2024-05, Vol.103, Article e11
  • Descrição: Wireline log correlation panels of palynologically analysed boreholes illustrate lateral facies transitions within Rupelian age strata of the Dutch Rupel Formation across the southeastern North Sea Basin. The middle to upper part of the Rupel Formation consists of clays and silts of the Boom Member and the overlying sandier Steensel Member. In the Mill and Goirle boreholes in the Dutch Province of North Brabant, the Boom Member is thickly developed and represents the middle to upper Rupelian (biozones NSO3 to NSO5a), while the Steensel Member is rather thinly developed and only comprises the uppermost Rupelian (biozone NSO5a). Borehole log correlations show that towards the south (or more proximal to the palaeo-continent) the Rupel Formation becomes sandier and the clayey Boom Member thins in favour of the sandy superjacent Steensel Member. Palynological analyses confirm that the Boom Member is restricted to the middle Rupelian (biozone NSO3) age here, and that the superjacent Steensel Member is of middle to upper Rupelian age (biozones NSO3 to NSO5a). Geological models constructed for northern Belgium propose that this facies transition occurs rather sharply, along a WSW-ENE oriented zone parallel to the presumed shoreline at that time. The results of this study support this interpretation and extend the trend towards the Netherlands.
  • Editor: Cambridge, UK: Cambridge University Press
  • Idioma: Inglês;Holandês;Francês;Alemão
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