How does the Alpine belt end between Spain and Morocco ?

Michard, André; Chaloüan, Ahmed; Feinberg, H.; Goffé, Bruno; Montigny, R.

doi:10.2113/173.1.3

Cited by 237 publications

(180 citation statements)

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“…The stillexisting Maghrebian Tethys after 35 Ma is also consistent with the fact that the subduction recorded in the Temsamane Massif (under-thrust segment of the African margin) and likely in the Oran area had begun as a subduction within the Ketama-Oran Basin. We consequently propose that from 67 Ma to 35 Ma, the oblique convergence between Africa and Iberia was accommodated (1) by the progressive closure of the West Ligurian Tethys (see also Michard et al, 2002) and (2) by the subduction of the western part of the African margin (Temsamane and Oran units) below the Ketama-Flyschs oceanic basin.…”

Section: Mamentioning

confidence: 91%

“…This part of the history is better documented and corresponds to the subduction of the ELT and the Maghrebian Tethys below the drifted AlKaPeCa and Corsica-Sardinia blocks (Doglioni et al, 1999;Handy et al, 2010;Lacombe and Jolivet, 2005;Michard et al, 2002;see Figs. 13-15).…”

Section: The Oligocene-miocene Reorganizationmentioning

confidence: 91%

“…AlKaPeCa is a continental domain with European affinities (Bouillin, 1986;Michard et al, 2002Michard et al, , 2006. Except from a dismembered Mesozoic to Eocene cover (the so-called "Dorsale Calcaire"), unconformably capped by upper Oligocene to lower Miocene clastics, it mainly shows Paleozoic rocks distributed into two major nappes complexes.…”

Section: The Alkapeca and Flyschs Domainsmentioning

confidence: 99%

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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.

106

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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: Mamentioning

confidence: 91%

Section: The Oligocene-miocene Reorganizationmentioning

confidence: 91%

Section: The Alkapeca and Flyschs Domainsmentioning

confidence: 99%

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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.

106

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“…This microplate, owing to Jurassic-Cretaceous opening of the western Tethys ( fig. 2C), separated a northern (Nevadofilabride-Piemontese-Ligurian) branch from an eastern and southern (MaghrebianLucanian) branch of the Tethys (Martín-Algarra 1987; Guerrera et al 1993Guerrera et al , 2005Perrone 1996;Bonardi et al 2001;Chalouan et al 2001;Michard et al 2002;de Capoa et al 2003). Project CGL2005-03887 MEC (A. Martin-Algarra).…”

Section: Journal Of Geology T R I a S S I C -J U R A S S I C C O N Tmentioning

confidence: 99%

Compositional and Geochemical Signatures for the Sedimentary Evolution of the Middle Triassic–Lower Jurassic Continental Redbeds from Western-Central Mediterranean Alpine Chains

Critelli¹,

Mongelli²,

Perri³

et al. 2008

The Journal of Geology

103

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A B S T R A C TCompositional and chemical analyses suggest that Middle Triassic-Lower Liassic continental redbeds (in the internal domains of the Betic, Maghrebian, and Apenninic chains) can be considered a regional lithosome marking the TriassicJurassic rift-valley stage of Tethyan rifting, which led to the Pangaea breakup and subsequent development of a mosaic of plates and microplates. Sandstones are quartzose to quartzolithic and represent a provenance of continental block and recycled orogen, made up mainly of Paleozoic metasedimentary rocks similar to those underlying the redbeds. Mudrocks display K enrichments; intense paleoweathering under a hot, episodically humid climate with a prolonged dry season; and sediment recycling. Redbeds experienced temperatures in the range of 100°-160°C and lithostatic/ tectonic loading of more than 4 km. These redbeds represent an important stratigraphic signature to reconstruct a continental block (Mesomediterranean Microplate) that separated different realms of the western Tethys from MiddleLate Jurassic to Miocene, when it was completely involved in Alpine orogenesis.

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“…9. Geological cross-section through the Betic-Rif orocline (compiled after Michard et al, 2002) regionally coeval developments occurred in a current manner, meaning causal chains of broadly simultaneous and linked geological events governed the tectonostratigraphic evolution of the Betic-Rif orocline as a whole. Through the Neogene, marine communication occurred between the Atlantic and Mediterranean basins (Appendices 1 -7).…”

mentioning

confidence: 99%

Punctuated Neogene tectonics and stratigraphy of the African-Iberian plate-boundary zone: concurrent development of Betic-Rif basins (southern Spain, northern Morocco)

Sissingh

2008

Netherlands Journal of Geosciences

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The geological configuration of the present-day Mediterranean is characterized by a complex and extensive system of both interconnected and fragmented fold-and thrust belts that is associated with back-arc basins (e.g. Carminati et al., 1998;Rosenbaum & Lister, 2004). Their tectonic structure and setting are varied, and the compressional origin and growth of the different belts and the formation of the adjoining extensional basins also varies considerably in age. The different fold-andthrusts belts did not evolve during one single, uninterrupted cycle of Alpine orogenesis, but are the ultimate outcome of a prolonged, polyphase process of intermittent plate-tectonic interaction between the African-Arabian and Eurasian plates. This resulted in the creation and ultimate disappearance of two major oceanic basins, the Palaeotethys (mainly Palaeozoic) and the Neotethys (late Palaeozoic-Mesozoic). As in the preceding Jurassic and Cretaceous times, the motions of Africa-Arabia relative to Eurasia during the Tertiary were an important control on the geological evolution of the Alpine Tethys (late Mesozoic-Tertiary). Various kinematic frameworks for palaeotectonic and palaeogeographic reconstructions have been proposed for the region (e.g. Dewey et al., 1989;Rosenbaum et al., 2002). These were mostly based on analysis of rotation parameters (poles of rotation, rotation angles), which allowed to constrain past relative velocities between Africa and Eurasia. In addition, analysis of North Atlantic magnetic lineations helped to constrain the movement of Africa and Europe relative to North America. The consensus view is that during the Late Cretaceous Africa converged towards Europe in a S-N directed rotational mode. This was contemporaneous with spreading of the Azores part of the North Atlantic, the coeval opening of the Gulf of Biscay like a sphenochasm and the resulting anti-clockwise rotation of Iberia with respect to Eurasia. Sinistral motion occurred after an active plate boundary subject to left-lateral strike-slip faulting had been established at the northern margin of the Iberian block. Consequently, Iberia behaved like a promontory AbstractThis paper integrates the sequence stratigraphic and tectonic data related to the Neogene geodynamic and palaeogeographic development of the African-Iberian plate boundary zone between Spain and Morocco. Though the dating of individual tectonostratigraphic sequences and their delimiting sequence boundaries varies in accuracy and precision, their apparent correlation strongly suggests contemporaneous development of the Betic and Rif basins. This may likely be attributed to regional changes of the overall compressional intra-plate stress field. This, in turn, was governed by coeval plate-kinematic changes related to the ongoing collisional convergence of Africa and Iberia. The Neogene succession is characterised by brief tectonic pulses that governed the sequence stratigraphic development of the Betic-Rif basins (NBR phases). It broadly correlates with the coeval sequences in the ...

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How does the Alpine belt end between Spain and Morocco ?

Cited by 237 publications

References 0 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

Compositional and Geochemical Signatures for the Sedimentary Evolution of the Middle Triassic–Lower Jurassic Continental Redbeds from Western-Central Mediterranean Alpine Chains

Punctuated Neogene tectonics and stratigraphy of the African-Iberian plate-boundary zone: concurrent development of Betic-Rif basins (southern Spain, northern Morocco)

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