Propagación de las deformaciones plio-cuaternarias del frente del Rif hacia el antepaís
- J. Galindo-Zaldívar 1
- A. Chalouan 2
- P. Ruano 1
- K. Bargach 2
- A. Chabli 2
- C. Martín Lechado 3
- M. Akil 2
- C. Sanz de Galdeano 4
- M. Ahmamou 2
- A. Jabaloy 1
- L. Gourari 5
- M. Benmakhlouf
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1
Universidad de Granada
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2
Mohammed V University
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- 3 Instituto Geológico de España
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4
Instituto Andaluz de Ciencias de la Tierra
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5
Sidi Mohamed Ben Abdellah University
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ISSN: 1576-5172
Año de publicación: 2004
Título del ejemplar: IV Congreso Geológico de España (Zaragoza, 12-15 julio, 2004)
Número: 6
Páginas: 143-146
Tipo: Artículo
Otras publicaciones en: Geotemas (Madrid)
Resumen
The frontal part of the Rif is constituted by the Prerif Ridges, grouped into two tectonic arcs, separated by the Volubilis Depression. The southern branch o f these tectonic arcs is formed by south vergent folds, sometimes related to reverse faults. They determine the northern boundary of the Saïss Basin and represent, together with the Charb Basin, the foreland basins of the Rif. South of the Saïss Basin is located the Meseta and Middle Atlas that constitute the foreland. The Plio-Quaternary deformation related to the convergence o f the Eurasian and African plates are propagated towards the mountain front, where southwards and south-eastwards vergent thrusts, affecting up to Plio-Quaternary rocks, have been recognized. In addition, folding affects also Plio-Quaternary conglomerates that are tilted locally up to subvertical or reverse dips. The foreland basins underwent both N-S extension, as a consequence of the flexure o f the crust, and also local compression, probably as consequence of the southwards propagation of reverse faults of the mountain front. The foreland is also affected by recent deformation although with a lower intensity. Joints and some normal and strike-slip faults, points to a variable stress field including a roughly N-S compression.