Shear strength messurements and radiocarbon ages of sediment cores from the western Barents Sea shelf
High-resolution sediment echosounder data combined with radiocarbon-dated sediment cores allowed us to reconstruct the Late Quaternary stratigraphic architecture of the Kveithola Trough and surrounding Spitsbergenbanken. The deposits display the successive deglacial retreat of the Svalbard-Barents S...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.880820 2023-05-15T15:38:50+02:00 Shear strength messurements and radiocarbon ages of sediment cores from the western Barents Sea shelf Lantzsch, Hendrik Hanebuth, Till J J Horry, Jan Grave, Marina Rebesco, Michele Schwenk, Tilmann MEDIAN LATITUDE: 74.716834 * MEDIAN LONGITUDE: 17.235449 * SOUTH-BOUND LATITUDE: 74.630000 * WEST-BOUND LONGITUDE: 16.484820 * NORTH-BOUND LATITUDE: 74.881880 * EAST-BOUND LONGITUDE: 18.234900 * DATE/TIME START: 2013-07-22T16:03:00 * DATE/TIME END: 2013-08-10T12:40:00 2017-09-20 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.880820 https://doi.org/10.1594/PANGAEA.880820 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.880820 https://doi.org/10.1594/PANGAEA.880820 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Lantzsch, Hendrik; Hanebuth, Till J J; Horry, Jan; Grave, Marina; Rebesco, Michele; Schwenk, Tilmann (2017): Deglacial to Holocene history of ice-sheet retreat and bottom current strength on the western Barents Sea shelf. Quaternary Science Reviews, 173, 40-57, https://doi.org/10.1016/j.quascirev.2017.08.016 Center for Marine Environmental Sciences MARUM Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.880820 https://doi.org/10.1016/j.quascirev.2017.08.016 2023-01-20T07:34:01Z High-resolution sediment echosounder data combined with radiocarbon-dated sediment cores allowed us to reconstruct the Late Quaternary stratigraphic architecture of the Kveithola Trough and surrounding Spitsbergenbanken. The deposits display the successive deglacial retreat of the Svalbard-Barents Sea Ice Sheet. Basal subglacial till indicates that the grounded ice sheet covered both bank and trough during the Late Weichselian. A glaciomarine blanket inside the trough coinciding with laminated plumites on the bank formed during the initial ice-melting phase from at least 16.1 to 13.5 cal ka BP in close proximity to the ice margin. After the establishment of open-marine conditions at around 13.5 cal ka BP, a sediment drift developed in the confined setting of the Kveithola Trough, contemporary with crudely laminated mud, an overlying lag deposit, and modern bioclastic-rich sand on Spitsbergenbanken. The Kveithola Drift shows a remarkable grain-size coarsening from the moat towards the southern flank of the trough. This trend contradicts the concept of a separated drift (which would imply coarser grain sizes in proximity of the moat) and indicates that the southern bank is the main sediment source for the coarse material building up the Kveithola Drift. This depocenter represents, therefore, a yet undescribed combination of off-bank wedge and confined drift. Although the deposits inside Kveithola Trough and on Spitsbergenbanken display different depocenter geometries, time-equivalent grain-size changes imply a region-wide sediment-dynamic connection. We thus relate a phase of coarsest sediment supply (8.8-6.3 cal ka BP) to an increase in bottom current strength, which might be related to a stronger Atlantic Water inflow from the Southeast across the bank leading to winnowing and off-bank export of sandy sediments. Dataset Barents Sea Ice Sheet Sea ice Spitsbergenbanken Svalbard Svalbard-Barents Sea Ice sheet PANGAEA - Data Publisher for Earth & Environmental Science Barents Sea Southern Bank ENVELOPE(-55.552,-55.552,52.288,52.288) Svalbard ENVELOPE(16.484820,18.234900,74.881880,74.630000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Center for Marine Environmental Sciences MARUM |
spellingShingle |
Center for Marine Environmental Sciences MARUM Lantzsch, Hendrik Hanebuth, Till J J Horry, Jan Grave, Marina Rebesco, Michele Schwenk, Tilmann Shear strength messurements and radiocarbon ages of sediment cores from the western Barents Sea shelf |
topic_facet |
Center for Marine Environmental Sciences MARUM |
description |
High-resolution sediment echosounder data combined with radiocarbon-dated sediment cores allowed us to reconstruct the Late Quaternary stratigraphic architecture of the Kveithola Trough and surrounding Spitsbergenbanken. The deposits display the successive deglacial retreat of the Svalbard-Barents Sea Ice Sheet. Basal subglacial till indicates that the grounded ice sheet covered both bank and trough during the Late Weichselian. A glaciomarine blanket inside the trough coinciding with laminated plumites on the bank formed during the initial ice-melting phase from at least 16.1 to 13.5 cal ka BP in close proximity to the ice margin. After the establishment of open-marine conditions at around 13.5 cal ka BP, a sediment drift developed in the confined setting of the Kveithola Trough, contemporary with crudely laminated mud, an overlying lag deposit, and modern bioclastic-rich sand on Spitsbergenbanken. The Kveithola Drift shows a remarkable grain-size coarsening from the moat towards the southern flank of the trough. This trend contradicts the concept of a separated drift (which would imply coarser grain sizes in proximity of the moat) and indicates that the southern bank is the main sediment source for the coarse material building up the Kveithola Drift. This depocenter represents, therefore, a yet undescribed combination of off-bank wedge and confined drift. Although the deposits inside Kveithola Trough and on Spitsbergenbanken display different depocenter geometries, time-equivalent grain-size changes imply a region-wide sediment-dynamic connection. We thus relate a phase of coarsest sediment supply (8.8-6.3 cal ka BP) to an increase in bottom current strength, which might be related to a stronger Atlantic Water inflow from the Southeast across the bank leading to winnowing and off-bank export of sandy sediments. |
format |
Dataset |
author |
Lantzsch, Hendrik Hanebuth, Till J J Horry, Jan Grave, Marina Rebesco, Michele Schwenk, Tilmann |
author_facet |
Lantzsch, Hendrik Hanebuth, Till J J Horry, Jan Grave, Marina Rebesco, Michele Schwenk, Tilmann |
author_sort |
Lantzsch, Hendrik |
title |
Shear strength messurements and radiocarbon ages of sediment cores from the western Barents Sea shelf |
title_short |
Shear strength messurements and radiocarbon ages of sediment cores from the western Barents Sea shelf |
title_full |
Shear strength messurements and radiocarbon ages of sediment cores from the western Barents Sea shelf |
title_fullStr |
Shear strength messurements and radiocarbon ages of sediment cores from the western Barents Sea shelf |
title_full_unstemmed |
Shear strength messurements and radiocarbon ages of sediment cores from the western Barents Sea shelf |
title_sort |
shear strength messurements and radiocarbon ages of sediment cores from the western barents sea shelf |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.880820 https://doi.org/10.1594/PANGAEA.880820 |
op_coverage |
MEDIAN LATITUDE: 74.716834 * MEDIAN LONGITUDE: 17.235449 * SOUTH-BOUND LATITUDE: 74.630000 * WEST-BOUND LONGITUDE: 16.484820 * NORTH-BOUND LATITUDE: 74.881880 * EAST-BOUND LONGITUDE: 18.234900 * DATE/TIME START: 2013-07-22T16:03:00 * DATE/TIME END: 2013-08-10T12:40:00 |
long_lat |
ENVELOPE(-55.552,-55.552,52.288,52.288) ENVELOPE(16.484820,18.234900,74.881880,74.630000) |
geographic |
Barents Sea Southern Bank Svalbard |
geographic_facet |
Barents Sea Southern Bank Svalbard |
genre |
Barents Sea Ice Sheet Sea ice Spitsbergenbanken Svalbard Svalbard-Barents Sea Ice sheet |
genre_facet |
Barents Sea Ice Sheet Sea ice Spitsbergenbanken Svalbard Svalbard-Barents Sea Ice sheet |
op_source |
Supplement to: Lantzsch, Hendrik; Hanebuth, Till J J; Horry, Jan; Grave, Marina; Rebesco, Michele; Schwenk, Tilmann (2017): Deglacial to Holocene history of ice-sheet retreat and bottom current strength on the western Barents Sea shelf. Quaternary Science Reviews, 173, 40-57, https://doi.org/10.1016/j.quascirev.2017.08.016 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.880820 https://doi.org/10.1594/PANGAEA.880820 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.880820 https://doi.org/10.1016/j.quascirev.2017.08.016 |
_version_ |
1766370198306160640 |