Sedimentology of ODP Leg 104 holes
The long-term record of glacial/interglacial cycles indicates three major paleoceanographic regimes in the Norwegian Sea. The period since the first major glaciation over Scandinavia at 2.56 Ma is characterized by high-frequency, low-amplitude oscillations of ice-rafted debris inputs, a lowered sali...
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1989
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.736351 https://doi.org/10.1594/PANGAEA.736351 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.736351 2023-05-15T16:52:43+02:00 Sedimentology of ODP Leg 104 holes Henrich, Rüdiger MEDIAN LATITUDE: 67.420000 * MEDIAN LONGITUDE: 2.170640 * SOUTH-BOUND LATITUDE: 67.220000 * WEST-BOUND LONGITUDE: 1.033300 * NORTH-BOUND LATITUDE: 67.715000 * EAST-BOUND LONGITUDE: 2.930000 * DATE/TIME START: 1985-06-28T14:40:00 * DATE/TIME END: 1985-08-08T01:45:00 1989-04-07 application/zip, 10 datasets https://doi.pangaea.de/10.1594/PANGAEA.736351 https://doi.org/10.1594/PANGAEA.736351 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.736351 https://doi.org/10.1594/PANGAEA.736351 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Henrich, Rüdiger (1989): Glacial/interglacial cycles in the Norwegian Sea: sedimentology, paleoceanography, and evolution of late Pliocene to Quaternary northern hemisphere climate. In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 189-232, https://doi.org/10.2973/odp.proc.sr.104.116.1989 104-642B 104-642C 104-643A DRILL Drilling/drill rig Joides Resolution Leg104 Norwegian Sea Ocean Drilling Program ODP Dataset 1989 ftpangaea https://doi.org/10.1594/PANGAEA.736351 https://doi.org/10.2973/odp.proc.sr.104.116.1989 2023-01-20T07:31:43Z The long-term record of glacial/interglacial cycles indicates three major paleoceanographic regimes in the Norwegian Sea. The period since the first major glaciation over Scandinavia at 2.56 Ma is characterized by high-frequency, low-amplitude oscillations of ice-rafted debris inputs, a lowered salinity, and decreased carbonate shell production in surface waters as well as overall strong carbonate dissolution at the sea floor. These conditions indicate a more zonal circulation pattern in the Northern Hemisphere and a relative isolation of surface and bottom waters in the Norwegian Sea. The generally temperate glacial climate was only interrupted by episodic weak intrusions of warm Atlantic waters. These intrusions have been detected in considerable magnitude only at Site 644, and thus are restricted to areas much closer to the Norwegian shelf than during earlier periods. The interval from 1.2 to 0.6 Ma is characterized by an increase in carbonate shell production and a better preservation, as well as a change in frequency patterns of ice-rafted debris inputs. This pattern reflects increasing meridionality in circulation-strengthening contrasts in the Norwegian Sea between strong glaciations and warm interglacials. The past 0.6 Ma reveal high-amplitude oscillations in carbonate records that are dominated by the 100-k.y. frequency pattern. Glacial/interglacial sedimentary cycles in the ODP Leg 104 drill sites reveal a variety of specific dark lithofacies. These dark diamictons reflect intense iceberg rafting in surface waters fed by surges along the front of marine-based parts of the continental ice sheets in the southeastern sector of the Norwegian Sea and are associated with resuspension of reworked fossil organic carbon and strong dissolution at the sea floor. Piling up of huge iceberg barriers along the Iceland-Faeroe-Scotland Ridge might have partially blocked off surface water connections with the North Atlantic during these periods Dataset Iceland North Atlantic Norwegian Sea PANGAEA - Data Publisher for Earth & Environmental Science Norwegian Sea ENVELOPE(1.033300,2.930000,67.715000,67.220000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
104-642B 104-642C 104-643A DRILL Drilling/drill rig Joides Resolution Leg104 Norwegian Sea Ocean Drilling Program ODP |
spellingShingle |
104-642B 104-642C 104-643A DRILL Drilling/drill rig Joides Resolution Leg104 Norwegian Sea Ocean Drilling Program ODP Henrich, Rüdiger Sedimentology of ODP Leg 104 holes |
topic_facet |
104-642B 104-642C 104-643A DRILL Drilling/drill rig Joides Resolution Leg104 Norwegian Sea Ocean Drilling Program ODP |
description |
The long-term record of glacial/interglacial cycles indicates three major paleoceanographic regimes in the Norwegian Sea. The period since the first major glaciation over Scandinavia at 2.56 Ma is characterized by high-frequency, low-amplitude oscillations of ice-rafted debris inputs, a lowered salinity, and decreased carbonate shell production in surface waters as well as overall strong carbonate dissolution at the sea floor. These conditions indicate a more zonal circulation pattern in the Northern Hemisphere and a relative isolation of surface and bottom waters in the Norwegian Sea. The generally temperate glacial climate was only interrupted by episodic weak intrusions of warm Atlantic waters. These intrusions have been detected in considerable magnitude only at Site 644, and thus are restricted to areas much closer to the Norwegian shelf than during earlier periods. The interval from 1.2 to 0.6 Ma is characterized by an increase in carbonate shell production and a better preservation, as well as a change in frequency patterns of ice-rafted debris inputs. This pattern reflects increasing meridionality in circulation-strengthening contrasts in the Norwegian Sea between strong glaciations and warm interglacials. The past 0.6 Ma reveal high-amplitude oscillations in carbonate records that are dominated by the 100-k.y. frequency pattern. Glacial/interglacial sedimentary cycles in the ODP Leg 104 drill sites reveal a variety of specific dark lithofacies. These dark diamictons reflect intense iceberg rafting in surface waters fed by surges along the front of marine-based parts of the continental ice sheets in the southeastern sector of the Norwegian Sea and are associated with resuspension of reworked fossil organic carbon and strong dissolution at the sea floor. Piling up of huge iceberg barriers along the Iceland-Faeroe-Scotland Ridge might have partially blocked off surface water connections with the North Atlantic during these periods |
format |
Dataset |
author |
Henrich, Rüdiger |
author_facet |
Henrich, Rüdiger |
author_sort |
Henrich, Rüdiger |
title |
Sedimentology of ODP Leg 104 holes |
title_short |
Sedimentology of ODP Leg 104 holes |
title_full |
Sedimentology of ODP Leg 104 holes |
title_fullStr |
Sedimentology of ODP Leg 104 holes |
title_full_unstemmed |
Sedimentology of ODP Leg 104 holes |
title_sort |
sedimentology of odp leg 104 holes |
publisher |
PANGAEA |
publishDate |
1989 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.736351 https://doi.org/10.1594/PANGAEA.736351 |
op_coverage |
MEDIAN LATITUDE: 67.420000 * MEDIAN LONGITUDE: 2.170640 * SOUTH-BOUND LATITUDE: 67.220000 * WEST-BOUND LONGITUDE: 1.033300 * NORTH-BOUND LATITUDE: 67.715000 * EAST-BOUND LONGITUDE: 2.930000 * DATE/TIME START: 1985-06-28T14:40:00 * DATE/TIME END: 1985-08-08T01:45:00 |
long_lat |
ENVELOPE(1.033300,2.930000,67.715000,67.220000) |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Iceland North Atlantic Norwegian Sea |
genre_facet |
Iceland North Atlantic Norwegian Sea |
op_source |
Supplement to: Henrich, Rüdiger (1989): Glacial/interglacial cycles in the Norwegian Sea: sedimentology, paleoceanography, and evolution of late Pliocene to Quaternary northern hemisphere climate. In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 189-232, https://doi.org/10.2973/odp.proc.sr.104.116.1989 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.736351 https://doi.org/10.1594/PANGAEA.736351 |
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.736351 https://doi.org/10.2973/odp.proc.sr.104.116.1989 |
_version_ |
1766043099935539200 |