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Title

Geological characterization of the Prestige sinking area

AuthorsErcilla, Gemma CSIC ORCID ; Córdoba, Diego CSIC ORCID ; Gallart Muset, Josep CSIC ORCID; Gràcia, Eulàlia CSIC ORCID ; Muñoz, Josep A.; Somoza, Luis; Vázquez, J. T.; PRESTIGE Group
KeywordsPrestige
Galicia Bank
Morphology
Sedimentology
Geological hazards
Issue Date2006
PublisherElsevier
CitationMarine Pollution Bulletin 53(5-7): 208-219 (2006)
AbstractThe tanker Prestige sank off NW Iberia on the 19th November 2002. The stern and bow of the Prestige wreck are located on the southwestern edge of the Galicia Bank, at 3565 m and 3830 m water depths, respectively. This bank is a structural high controlled by major faults with predominant N–S, NNE–SSW, and NNW–SEE trends. It is characterized by moderate to low seismic activity. The faults have controlled the local depositional architecture, deforming, fracturing, relocating and distributing sediments since the Valangian (early Cretaceous). The Prestige sinking area corresponds to an asymmetric half-graben structure with a N–S trend, which conditions the present-day morphology. The faulted flank outcrops and its activity and erosion have favoured the occurrence of mass-movements (slumps, slump debris, mass-flows and turbidity currents), building valleys and depositional lobes. Nearsurface sediments comprise mostly terrigenous and biogenous turbiditic muds and sands with a minor presence of hemipelagic muds, except on the fault scarp where pelagites predominate. Potential geological hazards resulting from tectonic and sedimentary processes affect almost the entire Prestige sinking area
DescriptionSpecial issue The Prestige Oil Spill: A Scientific Response.-- 12 pages, 11 figures
Publisher version (URL)https://doi.org/10.1016/j.marpolbul.2006.03.016
URIhttp://hdl.handle.net/10261/27364
DOI10.1016/j.marpolbul.2006.03.016
ISSN0025-326X
Appears in Collections:(ICM) Artículos
(UTM) Artículos
(Geo3Bcn) Artículos

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