Northern Tunisia Thrust Belt – Deformation Model and Hydrocarbon Systems

Eleuchi, H.; Saidi, M.; Fourati, L.; Ghenima, R.; Friha, J.

doi:10.3997/2214-4609-pdb.8.t049

Cited by 21 publications

(24 citation statements)

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“…The same type of relationships between Neogene series resting unconformably on top of folded and partially eroded Mesozoic to Paleogene series has been described in the Tunisian offshore in the vicinity of Cape Bon, implying that early, pre‐Miocene inversion processes affected also this segment of the former North African passive margin [ Casero and Roure , 1994; Catalano et al , 1995; El‐Euchi et al , 2004] (Figure 5). Unlike in the Hodna basin, it was possible there to date different episodes of deformation, with onset of tectonic inversion being recorded already by Late Cretaceous unconformities.…”

Section: Pre‐collisional Coupling and Early Inversion Featuressupporting

confidence: 53%

Alpine inversion of the North African margin and delamination of its continental lithosphere

Roure¹,

Casero²,

Addoum³

2012

Tectonics

176

129

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This paper aims at summarizing the current extent and architecture of the former Mesozoic passive margin of North Africa from North Algeria in the west up to the Ionian‐Calabrian arc and adjacent Mediterranean Ridge in the east. Despite that most paleogeographic models consider that the Eastern Mediterranean Basin as a whole is still underlain by remnants of the Permo‐Triassic or a younger Cretaceous Tethyan‐Mesogean ocean, the strong similarities documented here in structural styles and timing of inversion between the Saharan Atlas, Sicilian Channel and the Ionian abyssal plain evidence that this portion of the Eastern Mediterranean Basin still belongs to the distal portion of the North African continental margin. A rim of Tethyan ophiolitic units can be also traced more or less continuously from Turkey and Cyprus in the east, in onshore Crete, in the Pindos in Greece and Mirdita in Albania, as well as in the Western Alps, Corsica and the Southern Apennines in the west, supporting the hypothesis that both the Apulia/Adriatic domain and the Eastern Mediterranean Basin still belong to the former southern continental margin of the Tethys. Because there is no clear evidence of crustal‐scale fault offsetting the Moho, but more likely a continuous yet folded Moho extending between the foreland and the hinterland beneath the Mediterranean arcs, we propose here a new model of delamination of the continental lithosphere for the Apennines and the Aegean arcs. In this model, only the mantle lithosphere of Apulia and the Eastern Mediterranean is still locally subducted and recycled in the asthenosphere, most if not all the northern portion of the African crust and coeval Moho being currently decoupled from its former, currently delaminated and subducted mantle lithosphere.

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Section: Pre‐collisional Coupling and Early Inversion Featuressupporting

confidence: 53%

Alpine inversion of the North African margin and delamination of its continental lithosphere

Roure¹,

Casero²,

Addoum³

2012

Tectonics

176

129

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“…This widespread turbidite series was deposited in one or several deepwater basins that existed between Europe and Africa during final closure of the Tethys Ocean, between the early Oligocene and the early Miocene (Rupelian to Burdigalian stages). It is generally recognised that in Tunisia, as in most of the orogenic belt, the Numidian Flysch is allochthonous or partially allochthonous and is in thrust contact with the adjacent formations (Rouvier, 1977;El Euchi et al, 2004;Riahi et al, 2007). Lying south and east of the thrust front, the autochthonous Bejaoua Group, including the Fortuna Sandstone Formation, is coeval in age and comprises shallow marine to fluvial sediments (Yaich et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

European provenance of the Numidian Flysch in northern Tunisia

et al. 2010

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Terra Nova, 00, 1–9, 2010 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.

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“…Moreover, the NW-SE faults appeared above the Triassic bodies during the previous period, will express and we thus attend notable variations of the facies and thicknesses on both sides of these faults. The extensional movements testified by the NW-SE normal faults are integrated in a NW-SE regional contractional event [139,112,120,21,47,136]. This compressive constraint generated principally reverse displacements along the NE-SW ancient faults.…”

Section: Early Eocenementioning

confidence: 99%

“…Figure 13. Table Summarizing the regional and global tectonic event that affected the northern Tunisian margin and western Mediterranean during the Mesozoic and Cenozoic [58,32,63,139,1,16,164,168,33,160,2,169,119,37,165,127,40,18,4,166,84,120,75,103,123,54,21,43,45,125,154,24,47].…”

Section: Synthesis and Conclusionmentioning

confidence: 99%

“…1), and particularly the northern Tunisia, fossilized successive paleogeographic and tectonic episodes. In fact, after rifting and extensional periods, which started at the end of the Paleozoic and continued during the Mesozoic [1][2][3][4][5][6], was settled the Alpine orogeny that results from the convergence movements between the African and Eurasian plates; it is induced by compressive tectonic stresses, beginning at least since the Tertiary intervals and probably the Late Cretaceous [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. This orogeny has induced, on the Mediterranean edges, many mountains chains extend from the Apennines at the East to the Betic Cordilleras at the West.…”

Section: Introductionmentioning

confidence: 99%

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