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New Insights of the Early Cretaceous Syn-Rift Sedimentation in the Mecella Structure (Northeastern Atlas of Tunisia): Geodynamic Evolution

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Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas (CAJG 2018)

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Abstract

Detailed stratigraphy and facies analysis of the Early Cretaceous successions outcropping in the Mecella structure (Northeastern Tunisian Atlas), integrated with a structural analysis, allowed us to characterize the evolution of an intraplatform basin. A syn-rift tectonic is associated with the development of the major synsedimentary normal fault systems producing the tilted blocks basin geometry in Northeastern Tunisian Atlas. Incised sandy turbidite canyon, soft-sediment deformational structures mainly represented by slumps, down-slope sliding of ancient deposits and halokinetic activity are the main features of a syn-rift intraplatform basin. The close up of this intraplatform basin history occurred in the Hauterivian and Barremian stages by the installation of a condensed shallow water carbonate platform on the higher structures. The biostratigraphic results and the facies analysis of the resedimented Triassic series allow us to ascribe the halokinetic activity to the Upper Valanginian.

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Authors and Affiliations

  1. Faculté des Lettres et des Sciences Humaines de Sousse, Department of Geography, Université de Sousse, Sousse Ryadh, Sousse, 4029, Tunisia

    Nejla Sekatni Aïch

  2. Geo‐resources Laboratory, Centre de Recherches et des Technologies des Eaux de Borj Cedria, B.P 273, Soliman, 8020, Tunisia

    Mohamed Gharbi

Authors
  1. Nejla Sekatni Aïch
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  2. Mohamed Gharbi
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Corresponding author

Correspondence to Nejla Sekatni Aïch .

Editor information

Editors and Affiliations

  1. Faculty of Sciences of Bizerte, University of Carthage, Amilcar, Tunisia

    Mabrouk Boughdiri

  2. Earth Science Department, University of Zaragoza, Zaragoza, Spain

    Beatriz Bádenas

  3. University of Kansas, Lawrence, KS, USA

    Paul Selden

  4. University of Grenoble Alpes, Grenoble, France

    Etienne Jaillard

  5. Institute of Earth Sciences, Heidelberg University, Heidelberg, Germany

    Peter Bengtson

  6. University of Bretagne Occidentale, Brest, France

    Bruno R.C. Granier

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Sekatni Aïch, N., Gharbi, M. (2019). New Insights of the Early Cretaceous Syn-Rift Sedimentation in the Mecella Structure (Northeastern Atlas of Tunisia): Geodynamic Evolution. In: Boughdiri, M., Bádenas, B., Selden, P., Jaillard, E., Bengtson, P., Granier, B. (eds) Paleobiodiversity and Tectono-Sedimentary Records in the Mediterranean Tethys and Related Eastern Areas. CAJG 2018. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-030-01452-0_61

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