9 Iconography
Access to the text (HTML) Access to the text (HTML)
PDF Access to the PDF text

Access to the full text of this article requires a subscription.
  • If you are a subscriber, please sign in 'My Account' at the top right of the screen.

  • If you want to subscribe to this journal, see our rates

  • You can purchase this item in Pay Per ViewPay per View - FAQ : 30,00 € Taxes included to order
    Pages Iconography Videos Other
    23 9 0 0

Comptes Rendus Géoscience
Volume 338, n° 1-2
pages 92-114 (janvier 2006)
Doi : 10.1016/j.crte.2005.11.011
Received : 4 October 2005 ;  accepted : 17 November 2005
Pressure-temperature-time constraints on the Maghrebide mountain building: evidence from the Rif-Betic transect (Morocco, Spain), Algerian correlations, and geodynamic implications
Contraintes pression-température-temps sur lʼédification des Maghrébides : données rifo-bétiques (Maroc, Espagne), corrélations algériennes et implications géodynamiques

André Michard a, , François Negro a, Omar Saddiqi b, Mohamed L. Bouybaouene c, Ahmed Chalouan c, Raymond Montigny d, Bruno Goffé a
a Laboratoire de géologie (UMR 8145 CNRS), École normale supérieure, 24, rue Lhomond, 75231 Paris cedex 05, France 
b Laboratoire de géodynamique et thermochronologie, faculté des sciences Aïn-Chock, BP 5366, Casablanca Maarif, Maroc 
c Département de géologie, faculté des sciences, BP 1014, Rabat Agdal, Maroc 
d École et Observatoire des sciences de la Terre (UMR 7516), 5, rue Descartes, 67084 Strasbourg cedex, France 

Corresponding author.

Written on invitation of the Editorial Board


The internal = northern zones of the Maghrebide belt includes allochthonous massifs that define, together with those from the Betics, Sicily and Calabria, a disrupted Alkapeca' terrane. In the Rif transect, taking advantage of new thermobarometric and geochronologic studies, we recognize a metamorphic complex with a mostly non-Alpine upper plate (Dorsale, Ghomarides-Malaguides), and a lower plate (Sebtides-Alpujarrides) affected by HP-LT, then HT-LP Alpine metamorphism. Some eastern Rif allochthons (Temsamane area) display MP metamorphism and could represent either Sebtide inliers or slivers from the African paleomargin. The Sebtide-Alpujarride late HT event also affects the bottom of the Ghomaride-Malaguide complex and can be related to the onset of the Alboran Sea rifting at  , whereas their HP event is ascribed to an earlier ( ?), north- to northeast-dipping subduction event. A review of the Algerian literature allows us to infer a similar structure and evolution for the Kabylides. The Alkapeca disruption is classically explained by back-arc extension above the retreating subduction of the Ligurian-Maghrebian oceanic lithosphere. The question of whether the latter subduction followed an earlier and opposite Alpine-Betic (Nevado-Filabride) subduction or not, remains open to discussion. To cite this article: A. Michard et al., C. R. Geoscience 338 (2006).

The full text of this article is available in PDF format.

Les zones internes = septentrionales des Maghrébides comportent des massifs allochtones qui définissent, avec celles des Bétiques, de Sicile et de Calabre, un terrain « Alkapeca » démembré. Dans le transect rifain, ces Internides forment un complexe métamorphique comportant une plaque supérieure (Dorsale, Ghomarides-Malaguides), presque sans métamorphisme alpin, et une plaque inférieure (Sebtides-Alpujarrides) affectée par des événements alpins HP-BT, puis HT-BP. Ce dernier événement affecte aussi la base des Ghomarides-Malaguides et peut être rattaché au début du rifting de la mer dʼAlboran, vers 25-22 Ma, tandis que le premier est attribuable à une subduction à pendage NNE vers 30-25 Ma (?). Une revue de la littérature algérienne indique quʼune structure et une évolution comparables caractérisent les Kabylides. La fragmentation dʼAlkapeca est classiquement expliquée par extension arrière-arc et le retrait de la subduction océanique liguro-maghrébine. Lʼéventualité dʼune subduction alpine-bétique (Névado-Filabrides) antérieure et de sens opposé demeure une question ouverte à la discussion. Pour citer cet article : A. Michard et al., C. R. Geoscience 338 (2006).

The full text of this article is available in PDF format.

Keywords : Gibraltar Arc, Mediterranean, Metamorphism, Geochronology, Alpine peridotites, Tectonics

Mots-clés : Arc de Gibraltar, Méditerranée, Métamorphisme, Géochronologie, Péridotites alpines, Tectonique

© 2006  Académie des sciences@@#104156@@
EM-CONSULTE.COM is registrered at the CNIL, déclaration n° 1286925.
As per the Law relating to information storage and personal integrity, you have the right to oppose (art 26 of that law), access (art 34 of that law) and rectify (art 36 of that law) your personal data. You may thus request that your data, should it be inaccurate, incomplete, unclear, outdated, not be used or stored, be corrected, clarified, updated or deleted.
Personal information regarding our website's visitors, including their identity, is confidential.
The owners of this website hereby guarantee to respect the legal confidentiality conditions, applicable in France, and not to disclose this data to third parties.
Article Outline