The crustal domains of the Alboran Basin (western Mediterranean)

Gomez de la Pena, Laura, Ranero, César R. and Gràcia, Eulàlia (2018) The crustal domains of the Alboran Basin (western Mediterranean) Tectonics, 37 (10). pp. 3352-3377. DOI 10.1029/2017TC004946.

[img]
Preview
Text
Pe-a_et_al-2018-Tectonics.pdf - Published Version
Available under License licenses_description_cc_by_nc_nd_4.0.

Download (17Mb) | Preview

Supplementary data:

Abstract

The Alboran Basin in the westernmost Mediterranean hosts the orogenic boundary between the Iberian and African plates. Although numerous geophysical studies of crustal structure onshore Iberia have been carried out during the last decade, the crustal structure of the Alboran Basin has comparatively been poorly studied. We analyze crustal‐scale images of a grid of new and reprocessed multichannel seismic profiles showing the tectonic structure and variations in the reflective character of the crust of the basin. The nature of the distinct domains has been ground‐truthed using available basement samples from drilling and dredging. Our results reveal four different crustal types ‐domains‐ of the Alboran Basin: a) a thin continental crust underneath the West Alboran and Malaga basins, which transitions to b) a magmatic arc crust in the central part of the Alboran Sea and the East Alboran Basin, c) the North‐African continental crust containing the Pytheas and Habibas sub‐basins, and d) the oceanic crust in the transition towards the Algero‐Balearic Basin. The Alboran Basin crust is configured in a fore‐arc basin (West Alboran and Malaga basins), a magmatic arc (central and East Alboran), and a back‐arc system in the easternmost part of the East Alboran Basin and mainly Algero‐Balearic Basin. The North‐African continental crust is influenced by arc‐related magmatism along its edge, and was probably affected by strike‐slip tectonics during westward migration of the Miocene subduction system. The distribution of active tectonic structures in the current compressional setting generally corresponds to boundaries between domains, possibly representing inherited lithospheric‐scale weak structures.

Document Type: Article
Keywords: Crustal domains, geodynamics, active tectonics, Alboran Basin, western Mediterranean
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
DOI etc.: 10.1029/2017TC004946
ISSN: 0278-7407
Projects: TOPOMED, EVENT, INSIGHT, FRAME, FLOWS, Future Ocean
Date Deposited: 03 Sep 2018 12:24
Last Modified: 07 Dec 2018 14:06
URI: http://eprints.uni-kiel.de/id/eprint/44130

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...