Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea
Two major meltwater events are documented in cores from the NW Labrador Sea. One occurred ca. 20,000 14C yr B.P. in association with deposition of a major detrital carbonate unit. Both prior to and after this event, δ18O values of near-surface planktonic foraminifera were 4.5%, indicating fully enri...
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ftoceanrep:oai:oceanrep.geomar.de:31996 2023-05-15T15:35:36+02:00 Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea Andrews, John T. Erlenkeuser, Helmut Tedesco, Katherine Aksu, Ali E. Jull, A.J.Timothy 1994 text https://oceanrep.geomar.de/id/eprint/31996/ https://oceanrep.geomar.de/id/eprint/31996/1/1-s2.0-S0033589484710039-main.pdf https://doi.org/10.1006/qres.1994.1003 en eng Elsevier https://oceanrep.geomar.de/id/eprint/31996/1/1-s2.0-S0033589484710039-main.pdf Andrews, J. T., Erlenkeuser, H., Tedesco, K., Aksu, A. E. and Jull, A. J. T. (1994) Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea. Quaternary Research, 41 (1). pp. 26-34. DOI 10.1006/qres.1994.1003 <https://doi.org/10.1006/qres.1994.1003>. doi:10.1006/qres.1994.1003 Article PeerReviewed 1994 ftoceanrep https://doi.org/10.1006/qres.1994.1003 2023-04-07T15:24:50Z Two major meltwater events are documented in cores from the NW Labrador Sea. One occurred ca. 20,000 14C yr B.P. in association with deposition of a major detrital carbonate unit. Both prior to and after this event, δ18O values of near-surface planktonic foraminifera were 4.5%, indicating fully enriched glacial values. A younger event (ca. 14,000 14 C yr B.P.) is characterized by a dramatic change in δ18O from 4.5 to 2.0% and coincided with the retreat of ice from the outer SE Baffin Shelf, possibly into Hudson Strait. These meltwater events coincide with Heinrich (H) layers 1 and 2 from North Atlantic sediments. The 14,000 14C yr B.P. meltwater event indicates that the eastern margin of the Laurentide Ice Sheet also underwent rapid retreat at approximately the same time as other ice sheet margins around the NE North Atlantic. A third major detrital carbonate event at the base of HU87-033-009, possibly correlative with Heinrich layer 3, occurred ca. 33,960 ± 675 14 C yr B.P.; however, this is older than the accepted date for H-3 of 27,000 14C yr B.P. and may be H-4. Article in Journal/Newspaper Baffin Hudson Strait Ice Sheet Labrador Sea North Atlantic Planktonic foraminifera OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) Quaternary Research 41 1 26 34 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Two major meltwater events are documented in cores from the NW Labrador Sea. One occurred ca. 20,000 14C yr B.P. in association with deposition of a major detrital carbonate unit. Both prior to and after this event, δ18O values of near-surface planktonic foraminifera were 4.5%, indicating fully enriched glacial values. A younger event (ca. 14,000 14 C yr B.P.) is characterized by a dramatic change in δ18O from 4.5 to 2.0% and coincided with the retreat of ice from the outer SE Baffin Shelf, possibly into Hudson Strait. These meltwater events coincide with Heinrich (H) layers 1 and 2 from North Atlantic sediments. The 14,000 14C yr B.P. meltwater event indicates that the eastern margin of the Laurentide Ice Sheet also underwent rapid retreat at approximately the same time as other ice sheet margins around the NE North Atlantic. A third major detrital carbonate event at the base of HU87-033-009, possibly correlative with Heinrich layer 3, occurred ca. 33,960 ± 675 14 C yr B.P.; however, this is older than the accepted date for H-3 of 27,000 14C yr B.P. and may be H-4. |
format |
Article in Journal/Newspaper |
author |
Andrews, John T. Erlenkeuser, Helmut Tedesco, Katherine Aksu, Ali E. Jull, A.J.Timothy |
spellingShingle |
Andrews, John T. Erlenkeuser, Helmut Tedesco, Katherine Aksu, Ali E. Jull, A.J.Timothy Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
author_facet |
Andrews, John T. Erlenkeuser, Helmut Tedesco, Katherine Aksu, Ali E. Jull, A.J.Timothy |
author_sort |
Andrews, John T. |
title |
Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
title_short |
Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
title_full |
Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
title_fullStr |
Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
title_full_unstemmed |
Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea |
title_sort |
late quaternary (stage 2 and 3) meltwater and heinrich events, northwest labrador sea |
publisher |
Elsevier |
publishDate |
1994 |
url |
https://oceanrep.geomar.de/id/eprint/31996/ https://oceanrep.geomar.de/id/eprint/31996/1/1-s2.0-S0033589484710039-main.pdf https://doi.org/10.1006/qres.1994.1003 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) |
geographic |
Hudson Hudson Strait |
geographic_facet |
Hudson Hudson Strait |
genre |
Baffin Hudson Strait Ice Sheet Labrador Sea North Atlantic Planktonic foraminifera |
genre_facet |
Baffin Hudson Strait Ice Sheet Labrador Sea North Atlantic Planktonic foraminifera |
op_relation |
https://oceanrep.geomar.de/id/eprint/31996/1/1-s2.0-S0033589484710039-main.pdf Andrews, J. T., Erlenkeuser, H., Tedesco, K., Aksu, A. E. and Jull, A. J. T. (1994) Late Quaternary (Stage 2 and 3) Meltwater and Heinrich Events, Northwest Labrador Sea. Quaternary Research, 41 (1). pp. 26-34. DOI 10.1006/qres.1994.1003 <https://doi.org/10.1006/qres.1994.1003>. doi:10.1006/qres.1994.1003 |
op_doi |
https://doi.org/10.1006/qres.1994.1003 |
container_title |
Quaternary Research |
container_volume |
41 |
container_issue |
1 |
container_start_page |
26 |
op_container_end_page |
34 |
_version_ |
1766365937001299968 |