Abstract
High-resolution seismic reflection profiles and multibeam bathymetry data collected in 2006 and 2008 around Pantelleria Island show the widespread occurrence of contourite drifts and erosional elements ~30 km from the narrowest part (~145 km) of the Sicily Channel, where water masses from the Eastern Mediterranean flow towards the Western Mediterranean. The contourite drifts are rather small (up to 10 km long and 3.3 km wide), at water depths of ~250–750 m. Most are elongated separated drifts with quite well-developed moats and crests, aligned roughly parallel to the regional bathymetric contours. Erosional elements include abraded surfaces, moats, scours and sub-circular depressions. In addition, a wide sector of the seafloor adjacent to a seamount located SW of Pantelleria Island is characterized by numerous biogenic build-ups colonized by deep-water corals (Madrepora oculata). The spatial distribution of sediment drifts, erosional features and biogenic build-ups suggests an origin from a north-westward-flowing bottom current, in this case the outflow of Levantine Intermediate Water and transitional Eastern Mediterranean Deep Water via the Sicily Channel. These findings for the Pantelleria offshore sector demonstrate that contourite processes are able to concentrate a high variety of closely spaced depositional and erosional features even in small areas (in this case, about 2,000 km2). This Pantelleria focusing can plausibly be related to a particular configuration of the prevailing bottom-current regime in complex interaction with an uneven bathymetry shaped mainly by tectonic and volcanic activity. The distribution of bottom currents seems to be strongly influenced by morphological features ranging from major seabed obstacles, such as the Pantelleria volcanic complex and the so-called southwest seamount, to smaller-scale escarpments and banks. This is consistent with previous findings for Mediterranean and other settings characterized by neotectonics and large topographic features.
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References
Amelio M, Martorelli E (2008) Seismo-stratigraphic characters of paleocontourites along the Calabro-Tyrrhenian margin (Southern Tyrrhenian Sea). Mar Geol 252(3/4):141–149
Astraldi M, Gasparini GP, Gervasio L, Salusti E (2001) Dense water dynamics along the Strait of Sicily (Mediterranean Sea). J Phys Oceanogr 31:3457–3475
Astraldi M, Gasparini GP, Vetrano A, Vignudelli S (2002) Hydrographic characteristics and interannual variability of water masses in the central Mediterranean: a sensitivity test for long-term changes in the Mediterranean Sea. Deep-Sea Res I 49:661–680
Bosman A, Calarco M, Casalbore D, Chiocci FL, Coltelli M, Conte AM, Martorelli E, Romagnoli C, Sposato A (2008) Submarine volcanic features in the Pantelleria offshore revealed by high-resolution swath bathymetry. Rend Soc Geol Ital 3:128–129
Civile D, Lodolo E, Accettella D, Geletti R, Ben-Avraham Z, Deponte M, Facchin L, Ramella R, Romeo R (2010) The Pantelleria graben (Sicily Channel, Central Mediterranean): an example of intraplate ‘passive’ rift. Tectonophysics 490(3/4):173–183. doi:10.1016/j.tecto.2010.05.008
Colantoni P (1975) Note di geologia marina sul Canale di Sicilia. Giorn Geol 40(1):181–207
Corti G, Cuffaro M, Doglioni C, Innocenti F, Manetti P (2006) Coexisting geodynamic processes in the Sicily Channel. In: Dilek Y, Pavlides S (eds) Postcollisional tectonics and magmatism in the Mediterranean region and Asia. Geol Soc Am Spec Publ 409:83–96
Davies TA, Laughton AS (1972) Sedimentary processes in the North Atlantic. In: Laughton AS, Berggren WA (eds) Init Rep Deep Sea Drilling Project, no 12. US Government Printing Office, Washington, DC, pp 905–934
Ercilla G, Baraza J, Alonso B, Estrada F, Casas D, Farran M (2002) The Ceuta Drift, Alboran Sea, Southwestern Mediterranean. In: Stow DAV, Pudsey CJ, Howe JA, Faugères JC, Viana AR (eds) Deep-water contourite systems: modern drifts and ancient series, seismic and sedimentary characteristics. Geol Soc Lond Mem 22:155–170
Faugères JC, Stow DAV, Imbert P, Viana AR (1999) Seismic features diagnostic of contourite drifts. Mar Geol 162:1–38
Freiwald A, Beuck L, Rüggeberg A, Taviani M, Hebbeln D (2009) The white coral community in the central Mediterranean Sea revealed by ROV surveys. Ocean 22:58–74
Gasparini GP, Ortona A, Budillon G, Astraldi M, Sansone E (2005) The effect of the Eastern Mediterranean Transient on the hydrographic characteristics in the Strait of Sicily and in the Tyrrhenian Sea. Deep-Sea Res I 52:915–935
Hernández-Molina FJ, Larter RD, Rebesco M, Maldonado A (2006) Miocene reversal of bottom water flow along the Pacific Margin of the Antarctic Peninsula: stratigraphic evidence from a contourite sedimentary tail. Mar Geol 228:93–116
Hernández-Molina FJ, Maldonado A, Stow DAV (2008a) Abyssal plain contourites. In: Rebesco M, Camerlenghi A (eds) Contourites. Developments in sedimentology, vol 60. Elsevier, Amsterdam, pp 369–370
Hernández-Molina FJ, Llave E, Stow DAV (2008b) Continental slope contourites. In: Rebesco M, Camerlenghi A (eds) Contourites. Developments in sedimentology, vol 60. Elsevier, Amsterdam, pp 396–407
Howe JA, Stoker MS, Masson DG, Pudsey CJ, Morris P, Larter RD, Bulat J (2006) Seabed morphology and the bottom-current pathways around Rosemary Bank seamount, northern Rockall Trough, North Atlantic. Mar Petrol Geol 23:165–181
MacLachlan SE, Elliott GM, Parson LM (2008) Investigations of the bottom current sculpted margin of Hatton Bank, NE Atlantic. Mar Geol 253:170–184
Marani M, Argnani A, Roveri M, Trincardi F (1993) Sediment drifts and erosional surfaces in the central Mediterranean: seismic evidence of bottom-current activity. Sediment Geol 82:207–220
McCave IN, Carter L (1997) Recent sedimentation beneath the Deep Western Boundary Current off northern New Zealand. Deep-Sea Res I 44(7):1203–1237
McCulloch M, Taviani M, Montagna P, Correa ML, Remia A, Mortimer G (2010) Proliferation and demise of deep-sea corals in the Mediterranean during the Younger Dryas. Earth Planet Sci Lett 298:143–152
Mulder T, Voisset M, Lecroart P, Le Drezen E, Gonthier E, Hanquiez V, Faugères J-C, Habgood E, Hernández-Molina FJ, Estrada F, Llave-Barranco E, Poirier D, Gorini C, Fuchey Y, Voelker A, Freitas P, Sanchez FL, Fernandez LM, Kenyon NH, Morel J (2003) The Gulf of Cadiz: an unstable giant contouritic levee. Geo-Mar Lett 23(1):7–18. doi:10.1007/s00367-003-0119-0
Nielsen TC, Knutz PC, Kuijpers A (2008) Seismic expression of contourite depositional systems. In: Rebesco M, Camerlenghi A (eds) Contourites. Developments in sedimentology, vol 60. Elsevier, Amsterdam, pp 301–320
Rebesco M, Stow DAV (2001) Seismic expression of contourites and related deposits: a preface. Mar Geophys Res 22:303–308
Reeder MS, Rothwell G, Stow DAV (2002) The Sicilian gateway: anatomy of deep-water connection between East and West Mediterranean basins. In: Stow DAV, Pudsey CJ, Faugères JC, Viana AR (eds) Deep-water contourite systems: modern drifts and ancient series, seismic and sedimentary characteristics. Geol Soc Lond Mem 22:171–189
Reuther CD (1987) Extensional tectonics within the central Mediterranean segment of the Afro-European zone of convergence. Mem Soc Geol Ital 38:69–80
Roberts DG, Hogg NG, Bishop DG, Flewellen CG (1974) Sediment distribution around moated seamounts in the northern Rockall Trough. Deep-Sea Res 21:175–184
Roden GI (1987) Effects of seamounts and seamount chains on ocean circulation and thermohaline structure. In: Keating BH, Fryer RB, Boehlert GW (eds) Seamounts, islands and atolls. Geophys Monogr 43:335–354
Rogers AD (1994) The biology of seamounts. Adv Mar Biol 30:305–340
Roveri M (2002) Sediment drifts of the Corsica Channel, northern Tyrrhenian Sea. In: Stow DAV, Faugères JC, Pudsey CJ, Viana AR (eds) Deep-water contourite systems: modern drifts and ancient series, seismic and sedimentary characteristics. Geol Soc Lond Mem 22:191–208
Sayago-Gil M, Long D, Hitchen K, Díaz-del-Río V, Fernández-Salas LM, Durán-Muñoz P (2010) Evidence for current-controlled morphology along the western slope of Hatton Bank (Rockall Plateau, NE Atlantic Ocean). Geo-Mar Lett 30(2):99–111. doi:10.1007/s00367-009-0163-5
Sparnocchia S, Gasparini GP, Astraldi M, Borghini M, Pistek P (1999) Dynamics and mixing of the eastern Mediterranean outflow in the Tyrrhenian basin. J Mar Syst 20:301–317
Stansfield K, Gasparini GP, Smeed DA (2003) High resolution observations of the path of the overflow from the Sicily Strait. Deep-Sea Res I 50:1129–1149
Taviani M, Remia A, Corselli C, Freiwald A, Malinverno E, Mastrototaro F, Savini A, Tursi A (2005) First geo-marine survey of living cold-water Lophelia reefs in the Ionian Sea (Mediterranean basin). Facies 50:409–417
Van Rooij D, Blamart D, Kozachenko M, Henriet JP (2007) Small mounded contourite drifts associated with deep-water coral banks, Porcupine Seabight, NE Atlantic Ocean. In: Viana A, Rebesco M (eds) Economic and palaeoceanographic importance of contourite deposits. Geol Soc Lond Spec Publ 276:225–244
Velasco J, Baraza J, Canals M, Balon J (1996) La depresion periferica y el lomo countourıtico de Menorca: evidencias de la cautividad de corrientes de fondo al norte del talud Balear. Geogaceta 20(2):390–393
Verdicchio G, Trincardi F (2008) Mediterranean shelf-edge muddy contourites: examples from the Gela and South Adriatic basins. Geo-Mar Lett 28(3):137–151. doi:10.1007/s00367-007-0096-9
Washington HS (1909) The submarine eruption of 1831 and 1891 near Pantelleria. Am J Sci 27:131–150
Acknowledgements
We thank the officers and crew of the R/V Urania for assistance during the Zibibbo and Passito cruises of 2006 and 2008. We acknowledge the guest editor D. Van Rooij, V.A.I. Huvenne, an anonymous reviewer and the journal editors for useful comments which helped improve the manuscript.
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Responsible guest editor: D. Van Rooij
Pantelleria Scientific Party: Alessandro Bosman, Marilena Calarco, Aida Maria Conte, Leonardo Macelloni, Ettore Salusti, Andrea Sposato
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Martorelli, E., Petroni, G., Chiocci, F.L. et al. Contourites offshore Pantelleria Island (Sicily Channel, Mediterranean Sea): depositional, erosional and biogenic elements. Geo-Mar Lett 31, 481–493 (2011). https://doi.org/10.1007/s00367-011-0244-0
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DOI: https://doi.org/10.1007/s00367-011-0244-0