Deep-water oceanic basin on the continental margin of the northeastern Atlantic
Porcupine Seabight Basin
Stratigraphic range: Paleozoic to Mesozoic [1]
Northeast Atlantic bathymetry, with Porcupine Bank and Porcupine Seabight
Type
Oceanic Basin
Unit of
Atlantic Borderland Basins
Area
60,000 km2[2]
Location
Region
Southwest of Ireland
Type section
Region
Territorial Waters
Country
Ireland
The Porcupine Seabight or Porcupine Basin is a deep-water oceanic basin located on the continental margin in the northeastern portion of the Atlantic Ocean.[3] It can be found in the southwestern offshore portion of Ireland and is part of a series of interconnected basins linked to a failed rift structure associated with the opening of the Northern Atlantic Ocean.[4] The basin extends in a North-South direction and was formed during numerous subsidence and rifting periods between the Late Carboniferous and Late Cretaceous.[1] It is bordered by the
Goban Spur to the south
Slyne Ridge to the north
Porcupine Bank to the west
Porcupine Abyssal Plain to the southwest
Due to subsidence, water depths range from 3000 m in the south near its mouth to 400 m in the north.[5] The Porcupine Basin lies on the Caledonian metamorphic basement and preserves up to 12 km of sedimentary strata from Late Palaeozoic to Quaternary which includes significant hydrocarbon reservoirs.[4] Sediment was likely sourced from the uplifted Caledonian metamorphic rocks of the Porcupine Median Ridge.[4]
The basin lent its name to Operation Seabight, an Irish drug-bust of November 2008.[6]
^ abCalvès, Gerome; Torvela, Taija; Huuse, Mads; Dinkelman, Menno (2012). "New Evidence for the Origin of the Porcupine Median Atlantic Ridge". Academia.edu. 13 (6): n/a. Retrieved 18 February 2015.
^Roland, Thomas. "Why all the interest in Porcupine Basin, Offshore Ireland" (PDF). www.europaoil.ocom. Europaoil. Retrieved 18 February 2015.
^ abcRyan, M.C.; Helland-Hansen, W.; Johannessen, E.P.; Steel, R.J. (2009). "Erosional vs. accretionary shelf margins: the influence of margin type on deepwater sedimentation: an example from the Porcupine Basin, offshore western Ireland". The Authors Journal Compilation. 21 (5): 676–703. Bibcode:2009BasR...21..676R. doi:10.1111/j.1365-2117.2009.00424.x. S2CID 129364281.
^Dorschel, B.; Wheeler, A.J.; Monteys, X.; Verbruggen, K. (2010). "Porcupine Seabight". Atlas of the Deep-Water Seabed. Ireland: Springer Netherlands. pp. 129–131. doi:10.1007/978-90-481-9376-1_13. ISBN 978-90-481-9375-2.
^"€750m cocaine seizure". Irish Examiner. 2008-11-07. Archived from the original on 2008-11-10. Retrieved 2008-11-08.
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