Title :

Plio-Quaternary tectonic evolution of the southern margin of the Alboran Basin (Western Mediterranean)

Author(s) :

Lafosse, Manfred [Auteur]
Institut des Sciences de la Terre de Paris [iSTeP]
d'Acremont, Elia [Auteur]
Institut des Sciences de la Terre de Paris [iSTeP]
Rabaute, Alain [Auteur]
Institut des Sciences de la Terre de Paris [iSTeP]
Estrada, Ferran [Auteur]
Instituto de Ciencias del Mar de Barcelona [ICM]
Jollivet-Castelot, Martin [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Galindo-Zaldivar, Jesus [Auteur]
Departamento de Geodinámica
Ercilla, Gemma [Auteur]
Instituto de Ciencias del Mar de Barcelona [ICM]
Alonso, Belen [Auteur]
Instituto de Ciencias del Mar de Barcelona [ICM]
Smit, Jeroen [Auteur]
Ammar, Abdellah [Auteur]
Université Mohammed V de Rabat [Agdal] [UM5]
Gorini, Christian [Auteur]
Institut des Sciences de la Terre de Paris [iSTeP]
Vasquez, Joan Tomas [Auteur]
Instituto Español de Oceanografía (IEO), Málaga.

Journal title :

Solid Earth

Pages :

741-765

Publisher :

European Geosciences Union

Publication date :

2020

ISSN :

1869-9510

HAL domain(s) :

Planète et Univers [physics]/Sciences de la Terre/Tectonique
Planète et Univers [physics]/Sciences de la Terre/Océanographie

English abstract : [en]

Progress in the understanding and dating of the sedimentary record of the Alboran Basin allows us to propose a model of its tectonic evolution since the Pliocene. After a period of extension, the Alboran Basin underwent a ...
Show more >Progress in the understanding and dating of the sedimentary record of the Alboran Basin allows us to propose a model of its tectonic evolution since the Pliocene. After a period of extension, the Alboran Basin underwent a progressive tectonic inversion starting around 9-7.5 Ma. The Alboran Ridge is a NE-SW transpressive structure accommodating the shortening in the basin. We mapped its southwestern termination, a Pliocene rhombic structure exhibiting series of folds and thrusts. The active Al-Idrissi Fault zone (AIF) is a Pleistocene strike-slip structure trending NNE-SSW. The AIF crosses the Alboran Ridge and connects to the transtensive Nekor Basin and the Nekor Fault to the south. In the Moroccan shelf and at the edge of a submerged volcano we dated the inception of the local subsidence at 1.81-1.12 Ma. The subsidence marks the propagation of the AIF toward the Nekor Basin. Pliocene thrusts and folds and Qua-ternary transtension appear at first sight to act at different tectonic periods but reflect the long-term evolution of a trans-pressive system. Despite the constant direction of Africa-Eurasia convergence since 6 Ma, along the southern margin of the Alboran Basin, the Pliocene-Quaternary compression evolves from transpressive to transtensive along the AIF and the Nekor Basin. This system reflects the logical evolution of the deformation of the Alboran Basin under the indentation of the African lithosphere.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

Les instabilités sous-marines en Mer d'Alboran (ALBAMAR): lien entre l'activité tectonique, la sismicité et la sédimentation et leur impact sur l'évaluation de l'aléa

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL