A resilient ice cover over the southernmost Mendeleev Ridge during the late Quaternary
The presence of a late Quaternary ice sheet/ice shelf over the East Siberian Sea has been proposed in several papers. Here, we further document its duration/resilience based on the sedimentary, bulk mineralogical, and geochemical (organic matter content and its stable isotopic composition, U‐Th seri...
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crwiley:10.1111/bor.12632 2024-06-02T08:02:05+00:00 A resilient ice cover over the southernmost Mendeleev Ridge during the late Quaternary Song, Tengfei Hillaire‐Marcel, Claude de Vernal, Anne Liu, Yanguang National Natural Science Foundation of China Natural Sciences and Engineering Research Council of Canada 2023 http://dx.doi.org/10.1111/bor.12632 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12632 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Boreas volume 53, issue 1, page 106-123 ISSN 0300-9483 1502-3885 journal-article 2023 crwiley https://doi.org/10.1111/bor.12632 2024-05-03T12:06:02Z The presence of a late Quaternary ice sheet/ice shelf over the East Siberian Sea has been proposed in several papers. Here, we further document its duration/resilience based on the sedimentary, bulk mineralogical, and geochemical (organic matter content and its stable isotopic composition, U‐Th series) properties of a core raised from the southernmost Mendeleev Ridge. The chronostratigraphy of the studied core was mainly built from the 230 Th excess ( 230 Th xs ) distribution and decay downcore. At the core‐top, peaking 230 Th xs values during the early MIS 3 and mid‐MIS 1 encompassing an MIS 2 hiatus were observed. As documented in several papers, these peaks suggest seasonally open ice conditions over proximal continental shelves. Below, the interval spanning MIS 4 and possibly MIS 5d records major ice‐rafting events illustrated by overall high coarse‐fraction contents. Underlying MIS 5e, down to MIS 11, the sediment depicts relatively low sand (1.7±2.5 dw%), high clay (33.5±4.7 dw%), and very low organic carbon (0.10±0.06 dw%) contents, and low δ 13 C org values (−24.3±0.9‰). This section is interpreted as recording fine sediment transport by deep currents and/or meltwater plumes below a resilient ice cover, only interrupted by a few short‐duration events. These events include (i) detrital carbonate pulses assigned to deglacial events along the NW Laurentide Ice Sheet margin (Termination (T) III), and (ii) intervals with some planktonic foraminifer occurrences, likely relating to their advection from open areas of the Arctic Ocean (MIS 5e, 9 and 11). All Terminations, but TII and the early MIS 3, show peaking Mn/Al values linked to the submergence of Arctic shelves under a rising sea level. We conclude that the resilient ice cover, likely an ice shelf, has been present over the southern Mendeleev Ridge during most of the interval after the Mid‐Pleistocene Transition and was favoured by the low summer insolation of the MIS 14 to 10 interval. Article in Journal/Newspaper Arctic Arctic Ocean East Siberian Sea Ice Sheet Ice Shelf Wiley Online Library Arctic Arctic Ocean East Siberian Sea ENVELOPE(166.000,166.000,74.000,74.000) Boreas 53 1 106 123 |
institution |
Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
The presence of a late Quaternary ice sheet/ice shelf over the East Siberian Sea has been proposed in several papers. Here, we further document its duration/resilience based on the sedimentary, bulk mineralogical, and geochemical (organic matter content and its stable isotopic composition, U‐Th series) properties of a core raised from the southernmost Mendeleev Ridge. The chronostratigraphy of the studied core was mainly built from the 230 Th excess ( 230 Th xs ) distribution and decay downcore. At the core‐top, peaking 230 Th xs values during the early MIS 3 and mid‐MIS 1 encompassing an MIS 2 hiatus were observed. As documented in several papers, these peaks suggest seasonally open ice conditions over proximal continental shelves. Below, the interval spanning MIS 4 and possibly MIS 5d records major ice‐rafting events illustrated by overall high coarse‐fraction contents. Underlying MIS 5e, down to MIS 11, the sediment depicts relatively low sand (1.7±2.5 dw%), high clay (33.5±4.7 dw%), and very low organic carbon (0.10±0.06 dw%) contents, and low δ 13 C org values (−24.3±0.9‰). This section is interpreted as recording fine sediment transport by deep currents and/or meltwater plumes below a resilient ice cover, only interrupted by a few short‐duration events. These events include (i) detrital carbonate pulses assigned to deglacial events along the NW Laurentide Ice Sheet margin (Termination (T) III), and (ii) intervals with some planktonic foraminifer occurrences, likely relating to their advection from open areas of the Arctic Ocean (MIS 5e, 9 and 11). All Terminations, but TII and the early MIS 3, show peaking Mn/Al values linked to the submergence of Arctic shelves under a rising sea level. We conclude that the resilient ice cover, likely an ice shelf, has been present over the southern Mendeleev Ridge during most of the interval after the Mid‐Pleistocene Transition and was favoured by the low summer insolation of the MIS 14 to 10 interval. |
author2 |
National Natural Science Foundation of China Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Song, Tengfei Hillaire‐Marcel, Claude de Vernal, Anne Liu, Yanguang |
spellingShingle |
Song, Tengfei Hillaire‐Marcel, Claude de Vernal, Anne Liu, Yanguang A resilient ice cover over the southernmost Mendeleev Ridge during the late Quaternary |
author_facet |
Song, Tengfei Hillaire‐Marcel, Claude de Vernal, Anne Liu, Yanguang |
author_sort |
Song, Tengfei |
title |
A resilient ice cover over the southernmost Mendeleev Ridge during the late Quaternary |
title_short |
A resilient ice cover over the southernmost Mendeleev Ridge during the late Quaternary |
title_full |
A resilient ice cover over the southernmost Mendeleev Ridge during the late Quaternary |
title_fullStr |
A resilient ice cover over the southernmost Mendeleev Ridge during the late Quaternary |
title_full_unstemmed |
A resilient ice cover over the southernmost Mendeleev Ridge during the late Quaternary |
title_sort |
resilient ice cover over the southernmost mendeleev ridge during the late quaternary |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/bor.12632 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12632 |
long_lat |
ENVELOPE(166.000,166.000,74.000,74.000) |
geographic |
Arctic Arctic Ocean East Siberian Sea |
geographic_facet |
Arctic Arctic Ocean East Siberian Sea |
genre |
Arctic Arctic Ocean East Siberian Sea Ice Sheet Ice Shelf |
genre_facet |
Arctic Arctic Ocean East Siberian Sea Ice Sheet Ice Shelf |
op_source |
Boreas volume 53, issue 1, page 106-123 ISSN 0300-9483 1502-3885 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1111/bor.12632 |
container_title |
Boreas |
container_volume |
53 |
container_issue |
1 |
container_start_page |
106 |
op_container_end_page |
123 |
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1800746578177163264 |