Marine flooding surfaces recorded in Permian black shales and coal deposits of the Main Karoo Basin (South Africa): implications for basin dynamics and cross-basin correlation

Annette E. Götz, Katrin Ruckwied, Alexander Wheeler

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    Abstract

    The marine origin of black shales in the context of the Permian postglacial development of the Karoo Basin, South Africa, is subject of an ongoing controversial discussion. Here, we present and discuss palynological and sedimentological data providing evidence of a transgressive event during the early Guadalupian. Palynofacies assemblages of the black shales of the southern basin include marine phytoplankton that exhibit peak abundance within the Whitehill shales and which also occur within siltstones and glauconitic sandstones on top of the No. 5 coal seam of the north-eastern basin. Palynostratigraphic control makes this marine signal a powerful tool for cross-basin correlation. Moreover, palynofacies analysis demonstrates a facies transition from terrestrial lacustrine and fluvio-deltaic in the northeast to deep marine in the south-western parts of the basin.
    Original languageEnglish
    Pages (from-to)178-190
    Number of pages13
    JournalInternational Journal of Coal Geology
    Volume190
    Early online date31 Oct 2017
    DOIs
    Publication statusPublished - 1 Apr 2018

    Keywords

    • marine-nonmarine correlation
    • black shales
    • coal
    • Permian
    • Karoo
    • South Africa

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