European provenance of the Numidian Flysch in northern Tunisia

Christine Fildes, Dorrik Stow, Sami Riahi, Mohamed Soussi, Urval Patel, J. Andy Milton, Stuart Marsh

    Research output: Contribution to journalArticle

    Abstract

    The ultimate source of the deepwater Numidian Flysch sediments has long been a matter of controversy. Did the sediments of this late Cenozoic orogenic belt in the western Mediterranean derive from a European or African source, or from a combination of the two? New data presented here strongly favour a European provenance. Zircon ages of 514 ± 19 Ma from Tunisia and 550 ± 28 Ma from Sicily can only have derived from rocks of European affinity. These zircons have been separated from quartz-rich sandstones with a distinctive, highly mature heavy mineral assemblage that is different from those of North African autochthonous formations. The mature petrography and dominance of euhedral prismatic zircon grains indicate a medium to high-grade metamorphic source. Most palaeocurrent data are indicative of flow from the N and NW. The original European provenance is most likely now represented by predominantly metamorphic rocks of the Kabylie belt in northern Algeria, as a result of microplate movement and thrust emplacement. © 2010 Blackwell Publishing Ltd.

    Original languageEnglish
    Pages (from-to)94-102
    Number of pages9
    JournalTerra Nova
    Volume22
    Issue number2
    DOIs
    Publication statusPublished - Apr 2010

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    Fildes, C., Stow, D., Riahi, S., Soussi, M., Patel, U., Milton, J. A., & Marsh, S. (2010). European provenance of the Numidian Flysch in northern Tunisia. Terra Nova, 22(2), 94-102. https://doi.org/10.1111/j.1365-3121.2009.00921.x