Geomorphology and Neogene tectonic evolution of the Palomares continental margin (Western Mediterranean)

Gómez de la Peña, L., Gràcia, E., Muñoz, A., Acosta, J., Gómez-Ballesteros, M., R. Ranero, C. and Uchupi, E. (2016) Geomorphology and Neogene tectonic evolution of the Palomares continental margin (Western Mediterranean) Tectonophysics, 689 . pp. 25-39. DOI 10.1016/j.tecto.2016.03.009.

Full text not available from this repository.

Supplementary data:

Abstract

The Palomares continental margin is located in the southeastern part of Spain. The margin main structure was formed during Miocene times, and it is currently part of the wide deformation zone characterizing the region between the Iberian and African plates, where no well-defined plate boundary occurs. The convergence between these two plates is here accommodated by several structures, including the left lateral strike–slip Palomares Fault. The region is characterized by sparse, low to moderate magnitude (Mw < 5.2) shallow instrumental earthquakes, although large historical events have also occurred. To understand the recent tectonic history of the margin we analyze new high-resolution multibeam bathymetry data and re-processed three multichannel seismic reflection profiles crossing the main structures. The analysis of seafloor morphology and associated subsurface structure provides new insights of the active tectonic features of the area. In contrast to other segments of the southeastern Iberian margin, the Palomares margin contains numerous large and comparatively closely spaced canyons with heads that reach near the coast. The margin relief is also characterized by the presence of three prominent igneous submarine ridges that include the Aguilas, Abubacer and Maimonides highs. Erosive processes evidenced by a number of scars, slope failures, gullies and canyon incisions shape the present-day relief of the Palomares margin. Seismic images reveal the deep structure distinguishing between Miocene structures related to the formation of the margin and currently active features, some of which may reactivate inherited structures. The structure of the margin started with an extensional phase accompanied by volcanic accretion during the Serravallian, followed by a compressional pulse that started during the Latemost Tortonian. Nowadays, tectonic activity offshore is subdued and limited to few, minor faults, in comparison with the activity recorded onshore. The deep Algero-Balearic Basin is affected by surficial processes, associated to halokinesis of Messinian evaporites.

Document Type: Article
Keywords: Multichannel seismic reflection, Swath-bathymetry, Geomorphology, SE Iberia margin, Geodynamic evolution
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1016/j.tecto.2016.03.009
ISSN: 0040-1951
Projects: Future Ocean
Date Deposited: 06 Oct 2017 10:58
Last Modified: 23 May 2019 08:38
URI: http://eprints.uni-kiel.de/id/eprint/39741

Actions (login required)

View Item View Item