Ice rafted debris of ODP Holes 104-642B and 104-644A in the Vøring Plateau
Studies of ice-rafted detritus in ODP holes from the Norwegian Sea document a series of glacial episodes in the surroundings of the Norwegian - Greenland Sea from the late Miocene (5.45 Ma) through the Pliocene. These glacial events were of smaller magnitude than those of the period postdating the m...
Main Authors: | , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2017
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.882973 https://doi.org/10.1594/PANGAEA.882973 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.882973 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.882973 2023-05-15T13:44:47+02:00 Ice rafted debris of ODP Holes 104-642B and 104-644A in the Vøring Plateau Jansen, Eystein Sjøholm, J Bleil, Ulrich Erichsen, JA MEDIAN LATITUDE: 66.951650 * MEDIAN LONGITUDE: 3.752500 * SOUTH-BOUND LATITUDE: 66.678300 * WEST-BOUND LONGITUDE: 2.928300 * NORTH-BOUND LATITUDE: 67.225000 * EAST-BOUND LONGITUDE: 4.576700 * DATE/TIME START: 1985-06-28T14:40:00 * DATE/TIME END: 1985-08-09T10:15:00 2017-11-13 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.882973 https://doi.org/10.1594/PANGAEA.882973 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.882973 https://doi.org/10.1594/PANGAEA.882973 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Jansen, Eystein; Sjøholm, J; Bleil, Ulrich; Erichsen, JA (1990): Neogene and Pleistocene glaciations in the northern hemisphere and late Miocene - Pliocene global ice volume fluctuations: Evidence from the Norwegian Sea. In: Geological History of the Polar Oceans: Arctic Versus Antarctic, edited by U. Bleil and J. Thiede, Kluwer Academic Publishers, the Netherlands, 677-705 Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.882973 2023-01-20T07:34:02Z Studies of ice-rafted detritus in ODP holes from the Norwegian Sea document a series of glacial episodes in the surroundings of the Norwegian - Greenland Sea from the late Miocene (5.45 Ma) through the Pliocene. These glacial events were of smaller magnitude than those of the period postdating the major onset of large scale northern hemisphere glacial cyclicity at 2.57 Ma. A further amplification of the glaciations took place after 1.2 Ma. Oxygen isotope records from benthic foraminifers indicate high-frequency global ice volume fluctuations since the late Miocene. A major glacial episode took place at 5.1 – 5 Ma, which lowered eustatic sea-level by about 80 m below the present. Similar lowerings of sea-level are also documented for some glacials in the Pliocene (3.7 – 3.1 Ma). These glacials indicate substantially larger Antarctic ice volumes than at present. The glacial episode at 5 Ma is correlated with the upper evaporite sequence of the Messinian salinity crisis in the Mediterranean. The Norwegian Sea was a net exporter of deep-water during most of the last 6 Myr. Periods of carbonate dissolution lasting several 100 kyr indicate intervals of reduced ventilation and a more stable water column in the Norwegian Sea in both the late Miocene — Pliocene and the early Quaternary. There is no clear evidence for reduced deep-water formation during the upper Messinian event. High-frequency variation in δ 13C indicates that changes in deep-water ventilation rate were coupled with orbital forcing. While the ventilation and deep-water chemistry of the Norwegian Sea has varied during the late Neogene, the δ 18O results indicate that Norwegian Sea deep-waters were denser and colder than those of the Atlantic during major portions of the last 6 Myr. Dataset Antarc* Antarctic Arctic Greenland Greenland Sea Norwegian Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Norwegian Sea Greenland Vøring Plateau ENVELOPE(4.000,4.000,67.000,67.000) ENVELOPE(2.928300,4.576700,67.225000,66.678300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
Studies of ice-rafted detritus in ODP holes from the Norwegian Sea document a series of glacial episodes in the surroundings of the Norwegian - Greenland Sea from the late Miocene (5.45 Ma) through the Pliocene. These glacial events were of smaller magnitude than those of the period postdating the major onset of large scale northern hemisphere glacial cyclicity at 2.57 Ma. A further amplification of the glaciations took place after 1.2 Ma. Oxygen isotope records from benthic foraminifers indicate high-frequency global ice volume fluctuations since the late Miocene. A major glacial episode took place at 5.1 – 5 Ma, which lowered eustatic sea-level by about 80 m below the present. Similar lowerings of sea-level are also documented for some glacials in the Pliocene (3.7 – 3.1 Ma). These glacials indicate substantially larger Antarctic ice volumes than at present. The glacial episode at 5 Ma is correlated with the upper evaporite sequence of the Messinian salinity crisis in the Mediterranean. The Norwegian Sea was a net exporter of deep-water during most of the last 6 Myr. Periods of carbonate dissolution lasting several 100 kyr indicate intervals of reduced ventilation and a more stable water column in the Norwegian Sea in both the late Miocene — Pliocene and the early Quaternary. There is no clear evidence for reduced deep-water formation during the upper Messinian event. High-frequency variation in δ 13C indicates that changes in deep-water ventilation rate were coupled with orbital forcing. While the ventilation and deep-water chemistry of the Norwegian Sea has varied during the late Neogene, the δ 18O results indicate that Norwegian Sea deep-waters were denser and colder than those of the Atlantic during major portions of the last 6 Myr. |
format |
Dataset |
author |
Jansen, Eystein Sjøholm, J Bleil, Ulrich Erichsen, JA |
spellingShingle |
Jansen, Eystein Sjøholm, J Bleil, Ulrich Erichsen, JA Ice rafted debris of ODP Holes 104-642B and 104-644A in the Vøring Plateau |
author_facet |
Jansen, Eystein Sjøholm, J Bleil, Ulrich Erichsen, JA |
author_sort |
Jansen, Eystein |
title |
Ice rafted debris of ODP Holes 104-642B and 104-644A in the Vøring Plateau |
title_short |
Ice rafted debris of ODP Holes 104-642B and 104-644A in the Vøring Plateau |
title_full |
Ice rafted debris of ODP Holes 104-642B and 104-644A in the Vøring Plateau |
title_fullStr |
Ice rafted debris of ODP Holes 104-642B and 104-644A in the Vøring Plateau |
title_full_unstemmed |
Ice rafted debris of ODP Holes 104-642B and 104-644A in the Vøring Plateau |
title_sort |
ice rafted debris of odp holes 104-642b and 104-644a in the vøring plateau |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.882973 https://doi.org/10.1594/PANGAEA.882973 |
op_coverage |
MEDIAN LATITUDE: 66.951650 * MEDIAN LONGITUDE: 3.752500 * SOUTH-BOUND LATITUDE: 66.678300 * WEST-BOUND LONGITUDE: 2.928300 * NORTH-BOUND LATITUDE: 67.225000 * EAST-BOUND LONGITUDE: 4.576700 * DATE/TIME START: 1985-06-28T14:40:00 * DATE/TIME END: 1985-08-09T10:15:00 |
long_lat |
ENVELOPE(4.000,4.000,67.000,67.000) ENVELOPE(2.928300,4.576700,67.225000,66.678300) |
geographic |
Antarctic Norwegian Sea Greenland Vøring Plateau |
geographic_facet |
Antarctic Norwegian Sea Greenland Vøring Plateau |
genre |
Antarc* Antarctic Arctic Greenland Greenland Sea Norwegian Sea |
genre_facet |
Antarc* Antarctic Arctic Greenland Greenland Sea Norwegian Sea |
op_source |
Supplement to: Jansen, Eystein; Sjøholm, J; Bleil, Ulrich; Erichsen, JA (1990): Neogene and Pleistocene glaciations in the northern hemisphere and late Miocene - Pliocene global ice volume fluctuations: Evidence from the Norwegian Sea. In: Geological History of the Polar Oceans: Arctic Versus Antarctic, edited by U. Bleil and J. Thiede, Kluwer Academic Publishers, the Netherlands, 677-705 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.882973 https://doi.org/10.1594/PANGAEA.882973 |
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.882973 |
_version_ |
1766206603397169152 |