Age analysis on fragments on Lophelia pertusa from the Darwin Mounds situated off the north west coast of Scotland, supplement to: Victorero, Lissette; Blamart, Dominique; Pons-Branchu, Edwige; Mavrogordato, Mark N; Huvenne, Veerle A I (2016): Reconstruction of the formation history of the Darwin Mounds, N Rockall Trough: How the dynamics of a sandy contourite affected cold-water coral growth. Marine Geology, 378, 186-195

Cold-water coral mounds, formed through a feed-back process of cold-water coral growth and sediment baffling, have been studied all along the NE Atlantic continental margin. However, major questions remain concerning their formation history, especially their initiation and early development in relat...

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Main Authors: Victorero, Lissette, Blamart, Dominique, Pons-Branchu, Edwige, Mavrogordato, Mark N, Huvenne, Veerle A I
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2017
Subjects:
Online Access:https://dx.doi.org/10.1594/pangaea.871618
https://doi.pangaea.de/10.1594/PANGAEA.871618
id ftdatacite:10.1594/pangaea.871618
record_format openpolar
spelling ftdatacite:10.1594/pangaea.871618 2023-05-15T17:08:42+02:00 Age analysis on fragments on Lophelia pertusa from the Darwin Mounds situated off the north west coast of Scotland, supplement to: Victorero, Lissette; Blamart, Dominique; Pons-Branchu, Edwige; Mavrogordato, Mark N; Huvenne, Veerle A I (2016): Reconstruction of the formation history of the Darwin Mounds, N Rockall Trough: How the dynamics of a sandy contourite affected cold-water coral growth. Marine Geology, 378, 186-195 Victorero, Lissette Blamart, Dominique Pons-Branchu, Edwige Mavrogordato, Mark N Huvenne, Veerle A I 2017 application/zip https://dx.doi.org/10.1594/pangaea.871618 https://doi.pangaea.de/10.1594/PANGAEA.871618 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.margeo.2015.12.001 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY article Supplementary Collection of Datasets Collection 2017 ftdatacite https://doi.org/10.1594/pangaea.871618 https://doi.org/10.1016/j.margeo.2015.12.001 2022-02-09T13:17:41Z Cold-water coral mounds, formed through a feed-back process of cold-water coral growth and sediment baffling, have been studied all along the NE Atlantic continental margin. However, major questions remain concerning their formation history, especially their initiation and early development in relation to the surrounding sediment dynamics. For the first time, two small mounds located in a sandy contourite have been cored from the top to mound base: here, the formation history of the Darwin Mounds, located in the Northern Rockall Trough was investigated and reconstructed from two piston cores using a multidisciplinary approach. This consisted of CT-scanning for quantifying coral density changes with depth, grain-size analysis to obtain the hydrodynamic trends and radiocarbon and U-series dating to place the results into a wider paleoceanographic context. The results show that the Darwin Mounds formed during the early Holocene (~ 10 ka BP) through sediment baffling, mainly by Lophelia pertusa. The initiation of both mounds shows a similar pattern of increased current velocities resulting in coarser sediment deposition and a relatively high coral density with a peak of 23 vol%. The mound growth was rapid between ~ 10?9.7 ka BP (up to 277 cm/ka in one of the mounds), with further vibrant growth periods around ~ 8.8 ka BP, 6.5 ka BP and 3.4 ka BP. The demise of the mounds ca. ~ 3 ka BP was likely caused by an intensification in bottom current velocities causing a hostile environment for coral growth in the contourite setting. In a wider context, the development of the Darwin Mounds appears to have responded to the relative strength and position of the Subpolar Gyre, which affected food supply to the corals, sedimentation rates, current speeds and other water mass properties in the area. Article in Journal/Newspaper Lophelia pertusa DataCite Metadata Store (German National Library of Science and Technology) Rockall Trough ENVELOPE(-15.036,-15.036,53.825,53.825)
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language English
description Cold-water coral mounds, formed through a feed-back process of cold-water coral growth and sediment baffling, have been studied all along the NE Atlantic continental margin. However, major questions remain concerning their formation history, especially their initiation and early development in relation to the surrounding sediment dynamics. For the first time, two small mounds located in a sandy contourite have been cored from the top to mound base: here, the formation history of the Darwin Mounds, located in the Northern Rockall Trough was investigated and reconstructed from two piston cores using a multidisciplinary approach. This consisted of CT-scanning for quantifying coral density changes with depth, grain-size analysis to obtain the hydrodynamic trends and radiocarbon and U-series dating to place the results into a wider paleoceanographic context. The results show that the Darwin Mounds formed during the early Holocene (~ 10 ka BP) through sediment baffling, mainly by Lophelia pertusa. The initiation of both mounds shows a similar pattern of increased current velocities resulting in coarser sediment deposition and a relatively high coral density with a peak of 23 vol%. The mound growth was rapid between ~ 10?9.7 ka BP (up to 277 cm/ka in one of the mounds), with further vibrant growth periods around ~ 8.8 ka BP, 6.5 ka BP and 3.4 ka BP. The demise of the mounds ca. ~ 3 ka BP was likely caused by an intensification in bottom current velocities causing a hostile environment for coral growth in the contourite setting. In a wider context, the development of the Darwin Mounds appears to have responded to the relative strength and position of the Subpolar Gyre, which affected food supply to the corals, sedimentation rates, current speeds and other water mass properties in the area.
format Article in Journal/Newspaper
author Victorero, Lissette
Blamart, Dominique
Pons-Branchu, Edwige
Mavrogordato, Mark N
Huvenne, Veerle A I
spellingShingle Victorero, Lissette
Blamart, Dominique
Pons-Branchu, Edwige
Mavrogordato, Mark N
Huvenne, Veerle A I
Age analysis on fragments on Lophelia pertusa from the Darwin Mounds situated off the north west coast of Scotland, supplement to: Victorero, Lissette; Blamart, Dominique; Pons-Branchu, Edwige; Mavrogordato, Mark N; Huvenne, Veerle A I (2016): Reconstruction of the formation history of the Darwin Mounds, N Rockall Trough: How the dynamics of a sandy contourite affected cold-water coral growth. Marine Geology, 378, 186-195
author_facet Victorero, Lissette
Blamart, Dominique
Pons-Branchu, Edwige
Mavrogordato, Mark N
Huvenne, Veerle A I
author_sort Victorero, Lissette
title Age analysis on fragments on Lophelia pertusa from the Darwin Mounds situated off the north west coast of Scotland, supplement to: Victorero, Lissette; Blamart, Dominique; Pons-Branchu, Edwige; Mavrogordato, Mark N; Huvenne, Veerle A I (2016): Reconstruction of the formation history of the Darwin Mounds, N Rockall Trough: How the dynamics of a sandy contourite affected cold-water coral growth. Marine Geology, 378, 186-195
title_short Age analysis on fragments on Lophelia pertusa from the Darwin Mounds situated off the north west coast of Scotland, supplement to: Victorero, Lissette; Blamart, Dominique; Pons-Branchu, Edwige; Mavrogordato, Mark N; Huvenne, Veerle A I (2016): Reconstruction of the formation history of the Darwin Mounds, N Rockall Trough: How the dynamics of a sandy contourite affected cold-water coral growth. Marine Geology, 378, 186-195
title_full Age analysis on fragments on Lophelia pertusa from the Darwin Mounds situated off the north west coast of Scotland, supplement to: Victorero, Lissette; Blamart, Dominique; Pons-Branchu, Edwige; Mavrogordato, Mark N; Huvenne, Veerle A I (2016): Reconstruction of the formation history of the Darwin Mounds, N Rockall Trough: How the dynamics of a sandy contourite affected cold-water coral growth. Marine Geology, 378, 186-195
title_fullStr Age analysis on fragments on Lophelia pertusa from the Darwin Mounds situated off the north west coast of Scotland, supplement to: Victorero, Lissette; Blamart, Dominique; Pons-Branchu, Edwige; Mavrogordato, Mark N; Huvenne, Veerle A I (2016): Reconstruction of the formation history of the Darwin Mounds, N Rockall Trough: How the dynamics of a sandy contourite affected cold-water coral growth. Marine Geology, 378, 186-195
title_full_unstemmed Age analysis on fragments on Lophelia pertusa from the Darwin Mounds situated off the north west coast of Scotland, supplement to: Victorero, Lissette; Blamart, Dominique; Pons-Branchu, Edwige; Mavrogordato, Mark N; Huvenne, Veerle A I (2016): Reconstruction of the formation history of the Darwin Mounds, N Rockall Trough: How the dynamics of a sandy contourite affected cold-water coral growth. Marine Geology, 378, 186-195
title_sort age analysis on fragments on lophelia pertusa from the darwin mounds situated off the north west coast of scotland, supplement to: victorero, lissette; blamart, dominique; pons-branchu, edwige; mavrogordato, mark n; huvenne, veerle a i (2016): reconstruction of the formation history of the darwin mounds, n rockall trough: how the dynamics of a sandy contourite affected cold-water coral growth. marine geology, 378, 186-195
publisher PANGAEA - Data Publisher for Earth & Environmental Science
publishDate 2017
url https://dx.doi.org/10.1594/pangaea.871618
https://doi.pangaea.de/10.1594/PANGAEA.871618
long_lat ENVELOPE(-15.036,-15.036,53.825,53.825)
geographic Rockall Trough
geographic_facet Rockall Trough
genre Lophelia pertusa
genre_facet Lophelia pertusa
op_relation https://dx.doi.org/10.1016/j.margeo.2015.12.001
op_rights Creative Commons Attribution 3.0 Unported
https://creativecommons.org/licenses/by/3.0/legalcode
cc-by-3.0
op_rightsnorm CC-BY
op_doi https://doi.org/10.1594/pangaea.871618
https://doi.org/10.1016/j.margeo.2015.12.001
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