Age determinations on 4 sediment cores off Iceland
The north Icelandic shelf is partly distinguished by the Tjörnes Fracture Zone featuring numerous active basins in a mud-dominated shelf environment. Late Glacial and Holocene high-resolution sedimentary records from this area have been studied with tephrochronology as the main tool for correlation...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.712327 2023-05-15T16:49:06+02:00 Age determinations on 4 sediment cores off Iceland Knudsen, Karen Luise Eiriksson, Jón MEDIAN LATITUDE: 66.637125 * MEDIAN LONGITUDE: -18.563133 * SOUTH-BOUND LATITUDE: 66.501500 * WEST-BOUND LONGITUDE: -19.505667 * NORTH-BOUND LATITUDE: 66.992833 * EAST-BOUND LONGITUDE: -17.699833 * DATE/TIME START: 1999-08-01T00:00:00 * DATE/TIME END: 1999-08-01T00:00:00 2002-02-09 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.712327 https://doi.org/10.1594/PANGAEA.712327 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.712327 https://doi.org/10.1594/PANGAEA.712327 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Knudsen, Karen Luise; Eiriksson, Jón (2002): Application of tephrochronology to the timing and correlation of palaeoceanographic events recorded in Holocene and Late Glacial shelf sediments off North Iceland. Marine Geology, 191(3-4), 165-188, https://doi.org/10.1016/S0025-3227(02)00530-3 1159G 1957ISL 5<56>Fr CALYPSO Calypso Corer GC Gravity corer HM107-03 IMAGES IMAGES V International Marine Global Change Study Marion Dufresne (1995) MD114 MD99-2271 MD99-2272 MD99-2275 N. Iceland shelf Eyjafjardarall North Icelandic Shelf Skjalfandadjup Dataset 2002 ftpangaea https://doi.org/10.1594/PANGAEA.712327 https://doi.org/10.1016/S0025-3227(02)00530-3 2023-01-20T07:31:22Z The north Icelandic shelf is partly distinguished by the Tjörnes Fracture Zone featuring numerous active basins in a mud-dominated shelf environment. Late Glacial and Holocene high-resolution sedimentary records from this area have been studied with tephrochronology as the main tool for correlation and for exact timing of palaeoceanographic events in the area. Data from three new piston cores from the shelf demonstrate the importance of tephra markers for the first chronological evaluation and correlation of the cores. The correlation is extended with lithological logs and with magnetic susceptibility records. A detailed multidisciplinary study (including biostratigraphy and tephrochronology) of a late Holocene record of predominantly muddy sediments at the same location demonstrates that marked variations in the distribution of water masses occurred repeatedly through the last 4500 cal. yr. Of special interest is the exact timing of a marked drop in sea-surface temperature in the area, indicated by ice rafting debris concentration, to about 50 years before the Hekla 3 eruption, which occurred at 2980 cal. yr BP. This appears to predate most records of a general cooling event in NW Europe by a couple of centuries. Two different possible age models, one based on 14C dates combined with tephra markers and one based on tephra markers alone, are discussed in context with the problem of different marine reservoir ages of the water masses in the area. Dataset Iceland PANGAEA - Data Publisher for Earth & Environmental Science Tjörnes ENVELOPE(-17.087,-17.087,66.152,66.152) ENVELOPE(-19.505667,-17.699833,66.992833,66.501500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
1159G 1957ISL 5<56>Fr CALYPSO Calypso Corer GC Gravity corer HM107-03 IMAGES IMAGES V International Marine Global Change Study Marion Dufresne (1995) MD114 MD99-2271 MD99-2272 MD99-2275 N. Iceland shelf Eyjafjardarall North Icelandic Shelf Skjalfandadjup |
spellingShingle |
1159G 1957ISL 5<56>Fr CALYPSO Calypso Corer GC Gravity corer HM107-03 IMAGES IMAGES V International Marine Global Change Study Marion Dufresne (1995) MD114 MD99-2271 MD99-2272 MD99-2275 N. Iceland shelf Eyjafjardarall North Icelandic Shelf Skjalfandadjup Knudsen, Karen Luise Eiriksson, Jón Age determinations on 4 sediment cores off Iceland |
topic_facet |
1159G 1957ISL 5<56>Fr CALYPSO Calypso Corer GC Gravity corer HM107-03 IMAGES IMAGES V International Marine Global Change Study Marion Dufresne (1995) MD114 MD99-2271 MD99-2272 MD99-2275 N. Iceland shelf Eyjafjardarall North Icelandic Shelf Skjalfandadjup |
description |
The north Icelandic shelf is partly distinguished by the Tjörnes Fracture Zone featuring numerous active basins in a mud-dominated shelf environment. Late Glacial and Holocene high-resolution sedimentary records from this area have been studied with tephrochronology as the main tool for correlation and for exact timing of palaeoceanographic events in the area. Data from three new piston cores from the shelf demonstrate the importance of tephra markers for the first chronological evaluation and correlation of the cores. The correlation is extended with lithological logs and with magnetic susceptibility records. A detailed multidisciplinary study (including biostratigraphy and tephrochronology) of a late Holocene record of predominantly muddy sediments at the same location demonstrates that marked variations in the distribution of water masses occurred repeatedly through the last 4500 cal. yr. Of special interest is the exact timing of a marked drop in sea-surface temperature in the area, indicated by ice rafting debris concentration, to about 50 years before the Hekla 3 eruption, which occurred at 2980 cal. yr BP. This appears to predate most records of a general cooling event in NW Europe by a couple of centuries. Two different possible age models, one based on 14C dates combined with tephra markers and one based on tephra markers alone, are discussed in context with the problem of different marine reservoir ages of the water masses in the area. |
format |
Dataset |
author |
Knudsen, Karen Luise Eiriksson, Jón |
author_facet |
Knudsen, Karen Luise Eiriksson, Jón |
author_sort |
Knudsen, Karen Luise |
title |
Age determinations on 4 sediment cores off Iceland |
title_short |
Age determinations on 4 sediment cores off Iceland |
title_full |
Age determinations on 4 sediment cores off Iceland |
title_fullStr |
Age determinations on 4 sediment cores off Iceland |
title_full_unstemmed |
Age determinations on 4 sediment cores off Iceland |
title_sort |
age determinations on 4 sediment cores off iceland |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.712327 https://doi.org/10.1594/PANGAEA.712327 |
op_coverage |
MEDIAN LATITUDE: 66.637125 * MEDIAN LONGITUDE: -18.563133 * SOUTH-BOUND LATITUDE: 66.501500 * WEST-BOUND LONGITUDE: -19.505667 * NORTH-BOUND LATITUDE: 66.992833 * EAST-BOUND LONGITUDE: -17.699833 * DATE/TIME START: 1999-08-01T00:00:00 * DATE/TIME END: 1999-08-01T00:00:00 |
long_lat |
ENVELOPE(-17.087,-17.087,66.152,66.152) ENVELOPE(-19.505667,-17.699833,66.992833,66.501500) |
geographic |
Tjörnes |
geographic_facet |
Tjörnes |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Supplement to: Knudsen, Karen Luise; Eiriksson, Jón (2002): Application of tephrochronology to the timing and correlation of palaeoceanographic events recorded in Holocene and Late Glacial shelf sediments off North Iceland. Marine Geology, 191(3-4), 165-188, https://doi.org/10.1016/S0025-3227(02)00530-3 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.712327 https://doi.org/10.1594/PANGAEA.712327 |
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.712327 https://doi.org/10.1016/S0025-3227(02)00530-3 |
_version_ |
1766039170677997568 |