Southern margin of the Variscan belt: the north-western Gondwana mobile zone (eastern Morocco and Northern Algeria) |
| |
| Authors: | A Piqué G Bossière J -P Bouillin A Chalouan Ch Hoepffner |
| |
| Institution: | (1) Département des Sciences de la Terre, Université de Bretagne occidentale, F 29287 Brest Cedex, France;(2) CAESS Rennes (LP 4661) et Laboratoire de Pétrologie et Minéralogie, 2, rue de la Houssinière, Nantes, France;(3) Institut Dolomieu, rue M. Gignoux, F 38031 Grenoble Cedex, France;(4) Département de Géologie, Faculté des Sciences, Avenue ibn Batouta, Rabat, Morocco |
| |
| Abstract: | Stratigraphic and structural correlations between the Palaeozoic massifs of eastern Morocco and northern Algeria allow three tectonic domains to be distinguished: (1) The cratonic zone, i.e. the West African platform which remained outside the Variscan chain and its peripherical margin (Moroccan Anti-Atlas and Algerian Ougarta); (2) a WSW-ENE trending zone, over 1500 km from Marrakech to Kabylia and Calabria (in their assumed Palaeozoic location). — This zone was characterized during the Late Palaeozoic by a continuous instability indicated by the development of successive turbiditic basins and a major orogeny at the Devonian-Carboniferous boundary; and (3) central and western Morocco, which corresponds to the external zones of the European Hercynides.The Marrakech-Kabylia zone separates the Variscan domain from the stable and undeformed West African craton. During Early Palaeozoic times it began as an extensive or transtensive zone. It has been deformed by the Late Devonian orogeny and by Carboniferous and Permian reactivation. The zone represents the southern limit of the Hercynian chain and is distinguished by its transcurrent regime throughout the Late Palaeozoic.
Correspondence to: A. Piqué |
| |
| Keywords: | Southern Variscan belt Palaeozoic eastern Morocco northern Algeria |
| 本文献已被 SpringerLink 等数据库收录！ |
|
