Hydrothermal history in the eastern margin of Tunisia: inferred magmatic rocks alterations, new paragenesis and associated gas occurrences

Kort, Hanene Matoussi; Asmi, Amina Mabrouk El; Ouazaa, N. Laridhi; Gasquet, Dominique; Saidi, M.

doi:10.1007/s12517-015-1836-1

Cited by 12 publications

(1 citation statement)

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“…However the Late Cretaceous extension is related to another rifting oriented NE-SW related to a tectonic motion between the African and Eurasian plates and responsible for NE-SW crustal extension and magmatism along NW-SE basement faults (Fairhead 1988;Guiraud & Maurin 1992;Guiraud et al 2005). In eastern Tunisia, NW-SE extensional structures have been highlighted and are associated with a high geothermal gradient and nume rous oil and gas fields (Laaridhi Ouazza 1994;Laaridhi Ouazza & Bédir 2005;Gabtni et al 2011;Mattoussi Kort et al 2015). Given that the crustal extension of the eastern margin of Tunisia prevailed until the Late Cretaceous, it led to a basin configuration that was controlled the deposition of post Cretaceous series as much as Ypresian ones.…”

Section: Lithostratigraphy and Depositionmentioning

confidence: 99%

Tectonosedimentary framework of Upper Cretaceous –Neogene series in the Gulf of Tunis inferred from subsurface data: implications for petroleum exploration

Dhraief¹,

Dhahri²,

Chalwati³

et al. 2017

Geologica Carpathica

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Abstract:The objective and the main contribution of this issue are dedicated to using subsurface data to delineate a basin beneath the Gulf of Tunis and its neighbouring areas, and to investigate the potential of this area in terms of hydrocarbon resources. Available well data provided information about the subsurface geology beneath the Gulf of Tunis. 2D seismic data allowed delineation of the basin shape, strata geometries, and some potential promising subsurface structures in terms of hydrocarbon accumulation. Together with lithostratigraphic data obtained from drilled wells, seismic data permitted the construction of isochron and isobath maps of Upper Cretaceous-Neogene strata. Structural and litho stratigraphic interpretations indicate that the area is tectonically complex, and they highlight the tectonic control of strata deposition during the Cretaceous and Neogene. Tectonic activity related to the geodynamic evolution of the northern African margin appears to have been responsible for several thickness and facies variations, and to have played a significant role in the establishment and evolution of petroleum systems in northeastern Tunisia. As for petroleum systems in the basin, the Cretaceous series of the Bahloul, Mouelha and Fahdene formations are acknowledged to be the main source rocks. In addition, potential reservoirs (Fractured Abiod and Bou Dabbous carbonated formations) sealed by shaly and marly formations (Haria and Souar formations respectively) show favourable geometries of trap structures (anticlines, tilted blocks, unconformities, etc.) which make this area adequate for hydrocarbon accumulations.

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