The last deglaciation of the Franz Victoria Trough, northern Barents Sea
A study of two piston cores and a 3.5 kHz seismic profile from the Franz Victoria Trough provides new stratigraphic, stable isotopic and foraminiferal AMS 14 C data that help constrain the timing of ice‐sheet retreat in the northern Barents Sea and the nature of the deglacial marine environment. Sil...
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crwiley:10.1111/j.1502-3885.1996.tb00838.x 2024-09-09T19:32:08+00:00 The last deglaciation of the Franz Victoria Trough, northern Barents Sea LUBINSKI, DAVID J. KORSUN, SERGEY POLYAK, LEONID FORMAN, STEVEN L. LEHMAN, SCOTT J. HERLIHY, FRANCES A. MILLER, GIFFORD H. 1996 http://dx.doi.org/10.1111/j.1502-3885.1996.tb00838.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1996.tb00838.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1996.tb00838.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 25, issue 2, page 89-100 ISSN 0300-9483 1502-3885 journal-article 1996 crwiley https://doi.org/10.1111/j.1502-3885.1996.tb00838.x 2024-07-25T04:22:50Z A study of two piston cores and a 3.5 kHz seismic profile from the Franz Victoria Trough provides new stratigraphic, stable isotopic and foraminiferal AMS 14 C data that help constrain the timing of ice‐sheet retreat in the northern Barents Sea and the nature of the deglacial marine environment. Silty diamicton at the base of each core, interpreted as till or ice‐marginal debris flow, suggests that the Barents ice sheet was grounded at the core sites (470 m water depth). Eight AMS 14 C dates on sediment overlying the diamicton indicate that the ice sheet retreated from both core sites by 12.9 ka and that postglacial sedimentation began 10 ka ago. These dates, combined with a recently published 14 C date from a nearby core, suggest that the Franz Victoria Trough may not have been deglaciated until c . 13 ka, 2000 years later than modeled ice‐sheet reconstructions indicate. In the trough, oxygen isotopic ratios in planktonic foraminifera N . pachyderma (sinistral) were 0.5–0.750, lower during deglaciation than after, probably as a result of ice‐sheet and/or iceberg melting. Foraminiferal assemblages suggest that Atlantic‐derived intermediate water may have begun to penetrate the trough c . 13 ka ago. Article in Journal/Newspaper Barents Sea Ice Sheet Planktonic foraminifera Wiley Online Library Barents Sea Boreas 25 2 89 100 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
A study of two piston cores and a 3.5 kHz seismic profile from the Franz Victoria Trough provides new stratigraphic, stable isotopic and foraminiferal AMS 14 C data that help constrain the timing of ice‐sheet retreat in the northern Barents Sea and the nature of the deglacial marine environment. Silty diamicton at the base of each core, interpreted as till or ice‐marginal debris flow, suggests that the Barents ice sheet was grounded at the core sites (470 m water depth). Eight AMS 14 C dates on sediment overlying the diamicton indicate that the ice sheet retreated from both core sites by 12.9 ka and that postglacial sedimentation began 10 ka ago. These dates, combined with a recently published 14 C date from a nearby core, suggest that the Franz Victoria Trough may not have been deglaciated until c . 13 ka, 2000 years later than modeled ice‐sheet reconstructions indicate. In the trough, oxygen isotopic ratios in planktonic foraminifera N . pachyderma (sinistral) were 0.5–0.750, lower during deglaciation than after, probably as a result of ice‐sheet and/or iceberg melting. Foraminiferal assemblages suggest that Atlantic‐derived intermediate water may have begun to penetrate the trough c . 13 ka ago. |
format |
Article in Journal/Newspaper |
author |
LUBINSKI, DAVID J. KORSUN, SERGEY POLYAK, LEONID FORMAN, STEVEN L. LEHMAN, SCOTT J. HERLIHY, FRANCES A. MILLER, GIFFORD H. |
spellingShingle |
LUBINSKI, DAVID J. KORSUN, SERGEY POLYAK, LEONID FORMAN, STEVEN L. LEHMAN, SCOTT J. HERLIHY, FRANCES A. MILLER, GIFFORD H. The last deglaciation of the Franz Victoria Trough, northern Barents Sea |
author_facet |
LUBINSKI, DAVID J. KORSUN, SERGEY POLYAK, LEONID FORMAN, STEVEN L. LEHMAN, SCOTT J. HERLIHY, FRANCES A. MILLER, GIFFORD H. |
author_sort |
LUBINSKI, DAVID J. |
title |
The last deglaciation of the Franz Victoria Trough, northern Barents Sea |
title_short |
The last deglaciation of the Franz Victoria Trough, northern Barents Sea |
title_full |
The last deglaciation of the Franz Victoria Trough, northern Barents Sea |
title_fullStr |
The last deglaciation of the Franz Victoria Trough, northern Barents Sea |
title_full_unstemmed |
The last deglaciation of the Franz Victoria Trough, northern Barents Sea |
title_sort |
last deglaciation of the franz victoria trough, northern barents sea |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.1111/j.1502-3885.1996.tb00838.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1996.tb00838.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1996.tb00838.x |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Ice Sheet Planktonic foraminifera |
genre_facet |
Barents Sea Ice Sheet Planktonic foraminifera |
op_source |
Boreas volume 25, issue 2, page 89-100 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.1996.tb00838.x |
container_title |
Boreas |
container_volume |
25 |
container_issue |
2 |
container_start_page |
89 |
op_container_end_page |
100 |
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1809900958488985600 |