Combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the Porcupine Seabight.
The Gollum Channel System (GCS) and Kings Channel System (KCS) are situated at a key location on the eastern side of the Porcupine Seabight to provide valuable insight into British-Irish Ice Sheet dynamics and sediment supply to the Belgica cold-water coral mound province. These channel systems are...
Published in: | Marine Geology |
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Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2021
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Online Access: | https://research.bangor.ac.uk/portal/en/researchoutputs/combined-control-of-bottom-and-turbidity-currents-on-the-origin-and-evolution-of-channel-systems-examples-from-the-porcupine-seabight(cbc159a6-a092-4402-abce-9d741cb00f61).html https://doi.org/10.1016/j.margeo.2021.106639 https://research.bangor.ac.uk/ws/files/39091095/MARGO_D_21_00114_R1.pdf |
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ftuwalesbangcris:oai:research.bangor.ac.uk:publications/cbc159a6-a092-4402-abce-9d741cb00f61 2024-06-23T07:53:50+00:00 Combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the Porcupine Seabight. Verweirder, Lotte Van Rooij, David White, Martin Van Landeghem, Katrien Bossée, Kimberley Georgiopoulou, Aggeliki 2021-12-01 application/pdf https://research.bangor.ac.uk/portal/en/researchoutputs/combined-control-of-bottom-and-turbidity-currents-on-the-origin-and-evolution-of-channel-systems-examples-from-the-porcupine-seabight(cbc159a6-a092-4402-abce-9d741cb00f61).html https://doi.org/10.1016/j.margeo.2021.106639 https://research.bangor.ac.uk/ws/files/39091095/MARGO_D_21_00114_R1.pdf eng eng https://research.bangor.ac.uk/portal/en/researchoutputs/combined-control-of-bottom-and-turbidity-currents-on-the-origin-and-evolution-of-channel-systems-examples-from-the-porcupine-seabight(cbc159a6-a092-4402-abce-9d741cb00f61).html info:eu-repo/semantics/openAccess Verweirder , L , Van Rooij , D , White , M , Van Landeghem , K , Bossée , K & Georgiopoulou , A 2021 , ' Combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the Porcupine Seabight. ' , Marine Geology , vol. 442 , 106639 . https://doi.org/10.1016/j.margeo.2021.106639 Porcupine Seabight submarine channel system continental margin processes seismic stratigraphy sediment gravity flow bottom current article 2021 ftuwalesbangcris https://doi.org/10.1016/j.margeo.2021.106639 2024-05-29T23:53:52Z The Gollum Channel System (GCS) and Kings Channel System (KCS) are situated at a key location on the eastern side of the Porcupine Seabight to provide valuable insight into British-Irish Ice Sheet dynamics and sediment supply to the Belgica cold-water coral mound province. These channel systems are the most efficient pathways for particles from the Irish Shelf edge to the Porcupine basin. The spatial and temporal variability of their activity are, therefore, likely to have significant regional consequences. However, the sedimentary processes involved in the evolution of both systems have not yet been comprehensively studied. Here, bathymetric, 2D seismic reflection and oceanographic data are used to reconstruct and compare the interplay between along-, across- and downslope processes through geomorphologic and seismic stratigraphic analyses. The initial seafloor topography of the systems was shaped in the late Miocene-late Pliocene by intense northward-flowing bottom currents during the first phases of the composite RD1 erosion event. The bases of the KCS and GCS were eroded by downslope-flowing turbidity currents during the last phase of the RD1 event. Sediment transport within the channels was probably most active during Quaternary glacial periods of lowered sea levels, and sediment carried downslope by turbidity currents was likely pirated and transported northwards by contour currents. Therefore, the channels are proposed to have been of major importance as a source of sediment and nutrients for the Belgica cold-water coral mounds and associated sediment drifts to the north. The GCS and KCS represent an area where bottom currents, turbidity currents, slope failures and hemipelagic processes have interacted throughout the Neogene and Quaternary. Article in Journal/Newspaper Ice Sheet Bangor University: Research Portal Porcupine Seabight ENVELOPE(-13.000,-13.000,50.500,50.500) Marine Geology 442 106639 |
institution |
Open Polar |
collection |
Bangor University: Research Portal |
op_collection_id |
ftuwalesbangcris |
language |
English |
topic |
Porcupine Seabight submarine channel system continental margin processes seismic stratigraphy sediment gravity flow bottom current |
spellingShingle |
Porcupine Seabight submarine channel system continental margin processes seismic stratigraphy sediment gravity flow bottom current Verweirder, Lotte Van Rooij, David White, Martin Van Landeghem, Katrien Bossée, Kimberley Georgiopoulou, Aggeliki Combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the Porcupine Seabight. |
topic_facet |
Porcupine Seabight submarine channel system continental margin processes seismic stratigraphy sediment gravity flow bottom current |
description |
The Gollum Channel System (GCS) and Kings Channel System (KCS) are situated at a key location on the eastern side of the Porcupine Seabight to provide valuable insight into British-Irish Ice Sheet dynamics and sediment supply to the Belgica cold-water coral mound province. These channel systems are the most efficient pathways for particles from the Irish Shelf edge to the Porcupine basin. The spatial and temporal variability of their activity are, therefore, likely to have significant regional consequences. However, the sedimentary processes involved in the evolution of both systems have not yet been comprehensively studied. Here, bathymetric, 2D seismic reflection and oceanographic data are used to reconstruct and compare the interplay between along-, across- and downslope processes through geomorphologic and seismic stratigraphic analyses. The initial seafloor topography of the systems was shaped in the late Miocene-late Pliocene by intense northward-flowing bottom currents during the first phases of the composite RD1 erosion event. The bases of the KCS and GCS were eroded by downslope-flowing turbidity currents during the last phase of the RD1 event. Sediment transport within the channels was probably most active during Quaternary glacial periods of lowered sea levels, and sediment carried downslope by turbidity currents was likely pirated and transported northwards by contour currents. Therefore, the channels are proposed to have been of major importance as a source of sediment and nutrients for the Belgica cold-water coral mounds and associated sediment drifts to the north. The GCS and KCS represent an area where bottom currents, turbidity currents, slope failures and hemipelagic processes have interacted throughout the Neogene and Quaternary. |
format |
Article in Journal/Newspaper |
author |
Verweirder, Lotte Van Rooij, David White, Martin Van Landeghem, Katrien Bossée, Kimberley Georgiopoulou, Aggeliki |
author_facet |
Verweirder, Lotte Van Rooij, David White, Martin Van Landeghem, Katrien Bossée, Kimberley Georgiopoulou, Aggeliki |
author_sort |
Verweirder, Lotte |
title |
Combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the Porcupine Seabight. |
title_short |
Combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the Porcupine Seabight. |
title_full |
Combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the Porcupine Seabight. |
title_fullStr |
Combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the Porcupine Seabight. |
title_full_unstemmed |
Combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the Porcupine Seabight. |
title_sort |
combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the porcupine seabight. |
publishDate |
2021 |
url |
https://research.bangor.ac.uk/portal/en/researchoutputs/combined-control-of-bottom-and-turbidity-currents-on-the-origin-and-evolution-of-channel-systems-examples-from-the-porcupine-seabight(cbc159a6-a092-4402-abce-9d741cb00f61).html https://doi.org/10.1016/j.margeo.2021.106639 https://research.bangor.ac.uk/ws/files/39091095/MARGO_D_21_00114_R1.pdf |
long_lat |
ENVELOPE(-13.000,-13.000,50.500,50.500) |
geographic |
Porcupine Seabight |
geographic_facet |
Porcupine Seabight |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Verweirder , L , Van Rooij , D , White , M , Van Landeghem , K , Bossée , K & Georgiopoulou , A 2021 , ' Combined control of bottom and turbidity currents on the origin and evolution of channel systems, examples from the Porcupine Seabight. ' , Marine Geology , vol. 442 , 106639 . https://doi.org/10.1016/j.margeo.2021.106639 |
op_relation |
https://research.bangor.ac.uk/portal/en/researchoutputs/combined-control-of-bottom-and-turbidity-currents-on-the-origin-and-evolution-of-channel-systems-examples-from-the-porcupine-seabight(cbc159a6-a092-4402-abce-9d741cb00f61).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.margeo.2021.106639 |
container_title |
Marine Geology |
container_volume |
442 |
container_start_page |
106639 |
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1802645669898354688 |