Upper‐crustal extension during oblique collision: the Temsamane extensional detachment (eastern Rif, Morocco)

Booth‐Rea, Guillermo; Jabaloy‐Sánchez, Antonio; Azdimousa, Ali; Asebriy, L.; Vázquez-Vílchez, Mercedes; Martı́nez-Martı́nez, José Miguel

doi:10.1111/j.1365-3121.2012.01089.x

Cited by 43 publications

(55 citation statements)

References 34 publications

(44 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analysis of the core-complex dome structures mentioned above and associated mylonites shows that the extensional faults detach in the middle or lower crust, not reaching HP conditions (e.g., Axen and Bartley, 1997;Booth-Rea et al, 2012;Isik and Tekeli, 2001;Martínez-Martínez et al, 2002. Thus, these extensional faults on their own are not capable of exhuming the HP-LT rocks to the surface, probably even in the case of sequential activity of two sets of detachments like those documented in the Sierra Nevada elongated dome in the Betics .…”

Section: Introductionmentioning

confidence: 93%

See 1 more Smart Citation

Continental subduction, intracrustal shortening, and coeval upper-crustal extension: P-T evolution of subducted south Iberian paleomargin metapelites (Betics, SE Spain)

2015

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 93%

“…The Gibraltar Arc formed by Early to Late Miocene collision of the Alboran domain over the south Iberian and Maghrebian paleomargins at the northern and southern branches of the arc, respectively (e.g., Faccenna et al, 2004;Booth-Rea et al, 2005;Behr and Platt, 2012;Booth-Rea et al, 2012;Jabaloy-Sánchez et al, in press, Fig. 1).…”

Section: Geological Settingmentioning

confidence: 98%

Continental subduction, intracrustal shortening, and coeval upper-crustal extension: P-T evolution of subducted south Iberian paleomargin metapelites (Betics, SE Spain)

2015

View full text Add to dashboard Cite

“…To the west and north, the Alboran domain is underlain by a nonmetamorphic, WNW‐ESE shortened fold‐thrust belt consisting of Triassic to upper Miocene carbonates that thrusted in Miocene time [ Platt et al ., ; Crespo‐Blanc , ; Meijninger and Vissers , ] and likely form the stratigraphic cover of the Nevado‐Filabride units. Alboran units in the Rif overlie metamorphosed North African margin units (Temsamane unit) with ~15–12 Ma 40 Ar/ 39 Ar cooling ages and are fringed by an ESE‐WNW shortened Middle‐Late Miocene fold‐thrust belt of the external Rif [ Negro et al ., ; Di Staso et al ., ; Booth‐Rea et al ., ]. The northwestern external Rif and the southwestern external Betics are overlain by flysch nappes derived from the presumably oceanic corridor between Iberia and Africa that formed as connection between the central Atlantic and Piemonte‐Ligurian Oceans in the Late Jurassic [ Frisch , ; Vissers et al ., ].…”

Section: Review: Structure and Metamorphism Of Alkapecamentioning

confidence: 99%

Origin and consequences of western Mediterranean subduction, rollback, and slab segmentation

2014

View full text Add to dashboard Cite

The western Mediterranean recorded subduction rollback, slab segmentation and separation.Here we address the questions of what caused Oligocene rollback initiation, and how its subsequent evolution split up an originally coherent fore arc into circum-southwest Mediterranean segments. We kinematically reconstruct western Mediterranean geology from subduction initiation to present, using Atlantic plate reconstructions as boundary condition. We test possible reconstructions against remnants of subducted lithosphere imaged by seismic tomography. Transform motion between Africa and Iberia (including the Baleares) between~120 and 85 Ma was followed by up to 150 km convergence until 30 Ma. Subduction likely initiated along the transform fault that accommodated pre-85 Ma translation. By thẽ 30 Ma inception of rollback, up to 150 km of convergence had formed a small slab below the Baleares. Iberia was disconnected from Sardinia/Calabria through the North Balearic Transform Zone (NBTZ). Subduction below Sardinia/Calabria was slightly faster than below the Baleares, the difference being accommodated in the Pyrenees. A moving triple junction at the trench-NBTZ intersection formed a subduction transform edge propagator fault between the Baleares and Calabria slab segments. Calabria rolled back eastward, whereas the Baleares slab underwent radial (SW-S-SE) rollback. After Kabylides-Africa collision, the western slab segment retreated toward Gibraltar, here reconstructed as the maximum rollback end-member model, and a Kabylides slab detached from Africa. Opening of a slab window below the NBTZ allowed asthenospheric rise to the base of the fore arc creating high-temperature metamorphism. Western Mediterranean rollback commenced only after sufficient slab-pull was created from 100 to 150 km of slow, forced subduction before~30 Ma.

show abstract

“…They result from lateral and frontal collapse during the late stages of the EMM exhumation (e.g. for the Temsamane Massif: Booth-Rea et al, 2012). In the eastern regions, the absence of subduction of the margin explains the absence of both EMM and wedge-top-basins.…”

Section: The Tell-rif: a Fundamentally Non-cylindrical Beltmentioning

confidence: 99%

“…We propose a two-steps scenario for the exhumation, which globally occurred in a context of left-lateral movement (Booth-Rea et al, 2012;Frizon de Lamotte andLeikine, 1985, 1987;Frizon de Lamotte et al, 1991;Jabaloy-Sánchez et al, 2015;Negro et al, 2007Negro et al, , 2008. In our view, after the subduction stage (Fig.…”

Section: "Collision" and Lateral Slab Tearing Along The African Marginmentioning

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

View full text Add to dashboard Cite

-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 ...

show abstract

Upper‐crustal extension during oblique collision: the Temsamane extensional detachment (eastern Rif, Morocco)

Cited by 43 publications

References 34 publications

Continental subduction, intracrustal shortening, and coeval upper-crustal extension: P-T evolution of subducted south Iberian paleomargin metapelites (Betics, SE Spain)

Continental subduction, intracrustal shortening, and coeval upper-crustal extension: P-T evolution of subducted south Iberian paleomargin metapelites (Betics, SE Spain)

Origin and consequences of western Mediterranean subduction, rollback, and slab segmentation

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

Contact Info

Product

Resources

About