Oxygen and carbon isotopic composition of benthic and planktonic foraminifers at DSDP Site 610
A record of carbon and oxygen isotopes in benthic and planktonic foraminifers has been obtained from the interval corresponding to the last 2.4 m.y. of Site 610, Holes 610 and 610A, with a sample resolution of about 30 kyr. The record from the late Quaternary (<0.9 Ma) shows large amplitudes and...
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1987
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.788583 2023-05-15T16:29:43+02:00 Oxygen and carbon isotopic composition of benthic and planktonic foraminifers at DSDP Site 610 Jansen, Eystein Sejrup, Hans Petter LATITUDE: 53.221500 * LONGITUDE: -18.886800 * DATE/TIME START: 1983-07-28T00:00:00 * DATE/TIME END: 1983-07-28T00:00:00 1987-09-13 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.788583 https://doi.org/10.1594/PANGAEA.788583 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.788583 https://doi.org/10.1594/PANGAEA.788583 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Jansen, Eystein; Sejrup, Hans Petter (1987): Stable isotope stratigraphy and amino-acid empimerization for the last 2.4 m.y. at Site 610, Holes 610 and 610A. In: Ruddiman, WF; Kidd, RB; Thomas, E; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 94, 879-888, https://doi.org/10.2973/dsdp.proc.94.123.1987 Deep Sea Drilling Project DSDP Dataset 1987 ftpangaea https://doi.org/10.1594/PANGAEA.788583 https://doi.org/10.2973/dsdp.proc.94.123.1987 2023-01-20T07:32:43Z A record of carbon and oxygen isotopes in benthic and planktonic foraminifers has been obtained from the interval corresponding to the last 2.4 m.y. of Site 610, Holes 610 and 610A, with a sample resolution of about 30 kyr. The record from the late Quaternary (<0.9 Ma) shows large amplitudes and high frequencies in oxygen isotopic variation. Prior to 0.9 Ma the isotopic variability record is reduced in amplitude (but not in frequency) compared with the late Quaternary, suggesting lower ice-volume and climatic fluctuations, and higher average eustatic sea level. Left-coiling (L, polar) Neogloboquadrinapachyderma were not found in samples between 1.0 and 2.2 Ma, indicating less influence of polar front migrations in the Northeast Atlantic. Both polar planktonic faunas and larger isotope fluctuations reappear in the lowermost samples (2.3 to 2.4 Ma), pointing toward a period of larger climatic variability in the late Pliocene than in the early Quaternary. The variation in benthic d13C and hence in deep-water d13C seems to have been constant through the analyzed section, reflecting a stable variability in the production of North Atlantic Deep Water (NADW) and possibly in Norwegian-Greenland Sea Overflow. Preliminary analyses of amino-acid epimerization in N. pachyderma (L) indicate a constant rate of epimerization to approximately 0.3 Ma. Beneath this level the average epimerization rate is much reduced. Dataset Greenland Greenland Sea NADW North Atlantic Deep Water North Atlantic Northeast Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Greenland ENVELOPE(-18.886800,-18.886800,53.221500,53.221500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Deep Sea Drilling Project DSDP |
spellingShingle |
Deep Sea Drilling Project DSDP Jansen, Eystein Sejrup, Hans Petter Oxygen and carbon isotopic composition of benthic and planktonic foraminifers at DSDP Site 610 |
topic_facet |
Deep Sea Drilling Project DSDP |
description |
A record of carbon and oxygen isotopes in benthic and planktonic foraminifers has been obtained from the interval corresponding to the last 2.4 m.y. of Site 610, Holes 610 and 610A, with a sample resolution of about 30 kyr. The record from the late Quaternary (<0.9 Ma) shows large amplitudes and high frequencies in oxygen isotopic variation. Prior to 0.9 Ma the isotopic variability record is reduced in amplitude (but not in frequency) compared with the late Quaternary, suggesting lower ice-volume and climatic fluctuations, and higher average eustatic sea level. Left-coiling (L, polar) Neogloboquadrinapachyderma were not found in samples between 1.0 and 2.2 Ma, indicating less influence of polar front migrations in the Northeast Atlantic. Both polar planktonic faunas and larger isotope fluctuations reappear in the lowermost samples (2.3 to 2.4 Ma), pointing toward a period of larger climatic variability in the late Pliocene than in the early Quaternary. The variation in benthic d13C and hence in deep-water d13C seems to have been constant through the analyzed section, reflecting a stable variability in the production of North Atlantic Deep Water (NADW) and possibly in Norwegian-Greenland Sea Overflow. Preliminary analyses of amino-acid epimerization in N. pachyderma (L) indicate a constant rate of epimerization to approximately 0.3 Ma. Beneath this level the average epimerization rate is much reduced. |
format |
Dataset |
author |
Jansen, Eystein Sejrup, Hans Petter |
author_facet |
Jansen, Eystein Sejrup, Hans Petter |
author_sort |
Jansen, Eystein |
title |
Oxygen and carbon isotopic composition of benthic and planktonic foraminifers at DSDP Site 610 |
title_short |
Oxygen and carbon isotopic composition of benthic and planktonic foraminifers at DSDP Site 610 |
title_full |
Oxygen and carbon isotopic composition of benthic and planktonic foraminifers at DSDP Site 610 |
title_fullStr |
Oxygen and carbon isotopic composition of benthic and planktonic foraminifers at DSDP Site 610 |
title_full_unstemmed |
Oxygen and carbon isotopic composition of benthic and planktonic foraminifers at DSDP Site 610 |
title_sort |
oxygen and carbon isotopic composition of benthic and planktonic foraminifers at dsdp site 610 |
publisher |
PANGAEA |
publishDate |
1987 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.788583 https://doi.org/10.1594/PANGAEA.788583 |
op_coverage |
LATITUDE: 53.221500 * LONGITUDE: -18.886800 * DATE/TIME START: 1983-07-28T00:00:00 * DATE/TIME END: 1983-07-28T00:00:00 |
long_lat |
ENVELOPE(-18.886800,-18.886800,53.221500,53.221500) |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland Sea NADW North Atlantic Deep Water North Atlantic Northeast Atlantic |
genre_facet |
Greenland Greenland Sea NADW North Atlantic Deep Water North Atlantic Northeast Atlantic |
op_source |
Supplement to: Jansen, Eystein; Sejrup, Hans Petter (1987): Stable isotope stratigraphy and amino-acid empimerization for the last 2.4 m.y. at Site 610, Holes 610 and 610A. In: Ruddiman, WF; Kidd, RB; Thomas, E; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 94, 879-888, https://doi.org/10.2973/dsdp.proc.94.123.1987 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.788583 https://doi.org/10.1594/PANGAEA.788583 |
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.788583 https://doi.org/10.2973/dsdp.proc.94.123.1987 |
_version_ |
1766019420475359232 |