Quaternary Mass-Transport Deposits on the North-Eastern Alboran Seamounts (SW Mediterranean Sea)
The Quaternary stratigraphic architecture of seamounts and surrounding deposits in the eastern Alboran Sea reveals at least 53 stacked MTDs in the Pollux Bank, Sabinar Bank (Sabinar Platform and Western Sabinar), Maimonides Ridge, and Adra Ridge. These MTDs are grouped into two types based on their size: small-scale MTDs (length <5 km and thickness <18 ms) and large-scale MTDs (length >5 km and thickness >18 ms). The study of these deposits has allowed us to define a close relationship between size (thickness-length) and source area gradients. The frequency of MTD events has varied between 40 and 373 kyr throughout the Quaternary (1.8 Ma to present). Correlation between individual MTDs is difficult but could be done for at least one local MTD event between Sabinar Platform and Western Sabinar (Sabinar Bank); in addition, one regional MTD event has been recognized around all of the studied seamounts. These failure events could have been triggered by tectonically controlled seismicity at both regional and local scale.
KeywordsMass-transport deposits Seismic profiles Seamounts Alboran Sea
This work was funded by the MONTERA (CTM2009-14157-C02-02) and CONTOURIBER (CTM2008-06399-C04-04/MAR) projects of the Spanish R&D Plan (MINECO). The Continental Margins Group would also like to acknowledge the R&D system of Catalonia “Generalitat de Catalunya” for the financial support received as part of the 2009 SGR107 programme. We thank IHS for supporting us with the Kingdom Suite Program. We also extend our thanks to the Ministry of the Environment and Rural and Marine Affairs (“Secretaria General del Mar”) for the bathymetric data. We also wish to thank Sebastian Migeon and Aggeliki Georgiopoulou for reviewing this paper.
- Alonso B, Ercilla G, Juan C, Casas D et~al. (2012a) Morpho-seismic characterization of Quaternary mass-movement deposits in the eastern sector of the Alboran Sea (SW Mediterranean). Geo-Temas 13:561–564Google Scholar
- Alonso B, Ercilla G, Juan C, Casas D et~al. (2012b) El abanico distal de Almeria: Arquitectura estratigráfica y evolución durante el Pleistoceno Superior (SO Mediterráneo). Geo-Temas 13:491–494Google Scholar
- Auzende J, Bonin J, Olivet JL (1975) La marge nord-africaine considérée comme marge active. Bull Soc Géol de Fr 37:486–495Google Scholar
- Comas MC, Zahn R, Klaus A (1996) Proceedings of the ocean drilling program, initial reports, College Station, Texas, vol 161, pp 179–296Google Scholar
- Ercilla G, Juan C, Estrada F, Casas D et~al. (2012) Contourite sedimentation in the Alboran Sea: Morphosedimentary characterization. Geo-Temas 13:1809–1812Google Scholar
- Estrada F, Ercilla G, Alonso B (1997) The tectosedimentary evolution of the northeastern Alboran Sea during the Plio-Quaternary. In: Cloetingh S et~al. (eds) Structural controls on sedimentary casin formation. Tectonophysics 282 (1–4), pp 423–442Google Scholar
- Juan C, Ercilla G, Estrada F, Casas D et~al. (2012) Contourite sedimentation in the Alboran Sea: Plio-Quaternary evolution. Geo-Temas 13:1817–1820Google Scholar
- Piper DJW, Mosher DC, Gauley BJ, Kenner K et al (2003) The chronology and recurrence of submarine mass movements on the continental slope off southern Canada. In: Locat J, Mienert J (eds) Submarine mass movements and their consequences, Advances in natural and technological hazard research 19. Kluwer Academic Publisher, Dordrecht, pp 299–306CrossRefGoogle Scholar
- Strozyk F, Strasser M, Föster A, Kopf A et al (2010) Slope failure in active margin environment: constraints from submarine landslide in the Hellenic arc. J Geophys Res 115(B08103):1–13Google Scholar
- Van Hinte JE (1978) Geohistory analysis. Application of micropaleontology in exploration geology. AAPG 62:201–222Google Scholar
- Vázquez A, Bárcenas P, Palomino D, Alonso B et~al. (2010) Sedimentary instabilities along the southwestern slope of the Alboran Ridge (SW Mediterranean). In: Abstracts of the 9th CIESM, Venice, Italy, 10–14 May 1978Google Scholar