Plio-Quaternary reactivation of the Neogene margin off NW Algiers, Algeria: The Khayr al Din bank

Yellès, Abdelkarim; Domzig, A.; Déverchère, Jacques; Bracène, Rabah; Lépinay, Bernard Mercier de; Strzerzynski, Pierre; Bertrand, Guillaume; Boudiaf, Azzedine; Winter, Thierry; Kherroubi, A.; Roy, Pascal Le; Djellit, Hamou

doi:10.1016/j.tecto.2008.11.030

Cited by 64 publications

(84 citation statements)

References 39 publications

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“…Hall et al, 2003 for minimum convergence rate avoiding thermal re-equilibration). Meghraoui et al (1996), Rabaute and Chamot-Rooke (2014), Lafosse et al (2017) and Yelles et al (2009). GALTEL abbreviation is for Gorringe-Alboran-Tell after Morel and Meghraoui (1996).…”

Section: The Middle-late Eocene Tectonic Crisismentioning

confidence: 99%

The Tell-Rif orogenic system (Morocco, Algeria, Tunisia) and the structural heritage of the southern Tethys margin

Leprêtre

Lamotte

Combier

et al. 2018

BSGF - Earth Sci. Bull.

102

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-The Tell-Rif (Tell in Algeria and Tunisia; Rif in Morocco) is the orogenic system fringing to the south the West Mediterranean basins. This system comprises three major tectonic-palaeogeographic zones from north to south: (1) the internal zones (AlKaPeCa for Alboran, Kabylies, Peloritan, Calabria) originating from the former northern European margin of the Maghrebian Tethys, (2) the "Flyschs zone" regarded as the former cover of the oceanic domain and (3) the external zones, forming the former southern Maghrebian Tethys margin more or less inverted. The Tell-Rif is interpreted as the direct result of the progressive closure of the Maghrebian Tethys until the collision between AlKaPeCa and Africa and, subsequently, the propagation of the deformation within Africa. This gives a consistent explanation for the offshore Neogene geodynamics and most authors share this simple scenario. Nevertheless, the current geodynamic models do not completely integrate the Tell-Rif geology. Based on the analysis of surface and sub-surface data, we propose a reappraisal of its present-day geometry in terms of geodynamic evolution. We highlight its non-cylindrical nature resulting from both the Mesozoic inheritance and the conditions of the tectonic inversion. During the Early Jurassic, we emphasize the development of NE-SW basins preceding the establishment of an E-W transform corridor connecting the Central Atlantic Ocean with the Ligurian Tethys. The Maghrebian Tethys developed just after, as the result of the Late Jurassic-Early Cretaceous left-lateral spreading between Africa and Iberia. By the Late Cretaceous, the occurrence of several tectonic events is related to the progressive convergence convergence between the two continents. A major pre-Oligocene (pre-35 Ma) compressional event is recorded in the Tell-Rif system. The existence of HP-LT metamorphic rocks associated with fragments of mantle in the External Metamorphic Massifs of the Eastern Rif and Western Tell shows that, at that time, the western part of the North-African margin was involved in a subduction below a deep basin belonging to the Maghrebian Tethys. At the same time, the closure of the West Ligurian Tethys through east-verging subduction led to a shift of the subduction, which jumped to the other side of AlKaPeCa involving both East Ligurian and Maghrebian Tethys. Slab rollback led to the development of the Oligo-Miocene back-arc basins of the West-Mediterranean, reworking the previous West Ligurian Tethys suture. The docking of AlKaPeCa against Africa occurred during the Late Burdigalian (17 Ma). Subsequently, the slab tearing triggered westward and eastward lateral movements that are responsible for the formation of the Gibraltar and Tyrrhenian Arcs respectively. The exhumation of the External Metamorphic Massifs occurred through tectonic underplating during the westward translation of the Alboran Domain. It resulted in the formation of both foredeep and wedge-top basins younger and younger westward. The lack of these elements in the eastern part ...

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Section: The Middle-late Eocene Tectonic Crisismentioning

confidence: 99%

The Tell-Rif orogenic system (Morocco, Algeria, Tunisia) and the structural heritage of the southern Tethys margin

Leprêtre

Lamotte

Combier

et al. 2018

BSGF - Earth Sci. Bull.

102

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“…1a). On a smaller scale, piggy-back basins are the visible subsurface indicators of deep thrusts below the Algerian margin Yelles et al, 2009). Still in the Mediterranean, the structural complexity is often increased by the proximity of subduction and collision zones which bound the plates (e.g.…”

Section: Introductionmentioning

confidence: 99%

Structure and evolution of a passive margin in a compressive environment: Example of the south-western Alps–Ligurian basin junction during the Cenozoic

Sage

Beslier

Thinon

et al. 2011

Marine and Petroleum Geology

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“…The compressive belt in the northern offshore of Sicily appears M. Cuffaro (&) MOX-Dipartimento di Matematica, Politecnico di Milano, Milan, Italy e-mail: marco.cuffaro@uniroma1.it F. Riguzzi Istituto Nazionale di Geofisica e Vulcanologia, sez. CNT, Rome, Italy as the eastern prolongation of the convergence zone characterizing the northwestern Africa margin, from Morocco to Tunisia, where the margin separating continental Africa from the oceanic southwestern Mediterranean Sea has been inverted by compression during the Plio-Quaternary (Déverchère et al 2005;Domzig, 2006;Yelles et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Coexisting tectonic settings: the example of the southern Tyrrhenian Sea

Cuffaro

Riguzzi

Scrocca

et al. 2011

Int J Earth Sci (Geol Rundsch)

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We performed geodetic strain rate analyses in southern Italy, using new GPS velocities. Two-dimensional strain and rotation rate fields were estimated and results show that most of the shortening is distributed in the northern Sicily offshore. Extension becomes more evident and comparable with shortening on the eastern side of the same margin, and greater in the eastern Sicily offshore. Principal shortening and extension rate axes are consistent with long-term geological features: seismic reflection profiles show both active compressive and extensional faults affecting Pleistocene strata. We show evidence for contemporaneous extension and transtension in the Cefalu Basin. Combining geodetic data and geological features point to the coexistence of independent geodynamic processes, i.e., the active E-W backarc spreading in the hangingwall of the Apennines subduction zone and shortening along the southern margin of the Tyrrhenian backarc basin operated by the NNW-motion of Africa relative to Eurasia

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Plio-Quaternary reactivation of the Neogene margin off NW Algiers, Algeria: The Khayr al Din bank

Cited by 64 publications

References 39 publications

The Tell-Rif orogenic system (Morocco, Algeria, Tunisia) and the structural heritage of the southern Tethys margin

The Tell-Rif orogenic system (Morocco, Algeria, Tunisia) and the structural heritage of the southern Tethys margin

Structure and evolution of a passive margin in a compressive environment: Example of the south-western Alps–Ligurian basin junction during the Cenozoic

Coexisting tectonic settings: the example of the southern Tyrrhenian Sea

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