Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history
Sediment core ARC4-BN05 collected from the Canada Basin, Arctic Ocean, covers the late to middle Quaternary (Marine Isotope Stage – MIS – 1–15, ca. 0.5–0.6 Ma) as estimated by correlation to earlier proposed Arctic Ocean stratigraphies and AMS 14 C dating of the youngest sediments. Detailed examinat...
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ftdoajarticles:oai:doaj.org/article:144e22b4cd964e5b80adcedb9c5a450b 2023-05-15T14:43:16+02:00 Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history L. Dong Y. Liu X. Shi L. Polyak Y. Huang X. Fang J. Liu J. Zou K. Wang F. Sun X. Wang 2017-05-01T00:00:00Z https://doi.org/10.5194/cp-13-511-2017 https://doaj.org/article/144e22b4cd964e5b80adcedb9c5a450b EN eng Copernicus Publications http://www.clim-past.net/13/511/2017/cp-13-511-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-13-511-2017 https://doaj.org/article/144e22b4cd964e5b80adcedb9c5a450b Climate of the Past, Vol 13, Iss 5, Pp 511-531 (2017) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2017 ftdoajarticles https://doi.org/10.5194/cp-13-511-2017 2022-12-31T15:25:44Z Sediment core ARC4-BN05 collected from the Canada Basin, Arctic Ocean, covers the late to middle Quaternary (Marine Isotope Stage – MIS – 1–15, ca. 0.5–0.6 Ma) as estimated by correlation to earlier proposed Arctic Ocean stratigraphies and AMS 14 C dating of the youngest sediments. Detailed examination of clay and bulk mineralogy along with grain size, content of Ca and Mn, and planktic foraminiferal numbers in core ARC4–BN05 provides important new information about sedimentary environments and provenance. We use increased contents of coarse debris as an indicator of glacier collapse events at the margins of the western Arctic Ocean, and identify the provenance of these events from mineralogical composition. Notably, peaks of dolomite debris, including large dropstones, track the Laurentide Ice Sheet (LIS) discharge events to the Arctic Ocean. Major LIS inputs occurred during the stratigraphic intervals estimated as MIS 3, intra-MIS 5 and 7 events, MIS 8, and MIS 10. Inputs from the East Siberian Ice Sheet (ESIS) are inferred from peaks of smectite, kaolinite, and chlorite associated with coarse sediment. Major ESIS sedimentary events occurred in the intervals estimated as MIS 4, MIS 6 and MIS 12. Differences in LIS vs. ESIS inputs can be explained by ice-sheet configurations at different sea levels, sediment delivery mechanisms (iceberg rafting, suspension plumes, and debris flows), and surface circulation. A long-term change in the pattern of sediment inputs, with an apparent step change near the estimated MIS 7–8 boundary (ca. 0.25 Ma), presumably indicates an overall glacial expansion at the western Arctic margins, especially in North America. Article in Journal/Newspaper Arctic Arctic Ocean canada basin Foraminifera* glacier* Ice Sheet Iceberg* Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Canada Climate of the Past 13 5 511 531 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 L. Dong Y. Liu X. Shi L. Polyak Y. Huang X. Fang J. Liu J. Zou K. Wang F. Sun X. Wang Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Sediment core ARC4-BN05 collected from the Canada Basin, Arctic Ocean, covers the late to middle Quaternary (Marine Isotope Stage – MIS – 1–15, ca. 0.5–0.6 Ma) as estimated by correlation to earlier proposed Arctic Ocean stratigraphies and AMS 14 C dating of the youngest sediments. Detailed examination of clay and bulk mineralogy along with grain size, content of Ca and Mn, and planktic foraminiferal numbers in core ARC4–BN05 provides important new information about sedimentary environments and provenance. We use increased contents of coarse debris as an indicator of glacier collapse events at the margins of the western Arctic Ocean, and identify the provenance of these events from mineralogical composition. Notably, peaks of dolomite debris, including large dropstones, track the Laurentide Ice Sheet (LIS) discharge events to the Arctic Ocean. Major LIS inputs occurred during the stratigraphic intervals estimated as MIS 3, intra-MIS 5 and 7 events, MIS 8, and MIS 10. Inputs from the East Siberian Ice Sheet (ESIS) are inferred from peaks of smectite, kaolinite, and chlorite associated with coarse sediment. Major ESIS sedimentary events occurred in the intervals estimated as MIS 4, MIS 6 and MIS 12. Differences in LIS vs. ESIS inputs can be explained by ice-sheet configurations at different sea levels, sediment delivery mechanisms (iceberg rafting, suspension plumes, and debris flows), and surface circulation. A long-term change in the pattern of sediment inputs, with an apparent step change near the estimated MIS 7–8 boundary (ca. 0.25 Ma), presumably indicates an overall glacial expansion at the western Arctic margins, especially in North America. |
format |
Article in Journal/Newspaper |
author |
L. Dong Y. Liu X. Shi L. Polyak Y. Huang X. Fang J. Liu J. Zou K. Wang F. Sun X. Wang |
author_facet |
L. Dong Y. Liu X. Shi L. Polyak Y. Huang X. Fang J. Liu J. Zou K. Wang F. Sun X. Wang |
author_sort |
L. Dong |
title |
Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history |
title_short |
Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history |
title_full |
Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history |
title_fullStr |
Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history |
title_full_unstemmed |
Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history |
title_sort |
sedimentary record from the canada basin, arctic ocean: implications for late to middle pleistocene glacial history |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-511-2017 https://doaj.org/article/144e22b4cd964e5b80adcedb9c5a450b |
geographic |
Arctic Arctic Ocean Canada |
geographic_facet |
Arctic Arctic Ocean Canada |
genre |
Arctic Arctic Ocean canada basin Foraminifera* glacier* Ice Sheet Iceberg* |
genre_facet |
Arctic Arctic Ocean canada basin Foraminifera* glacier* Ice Sheet Iceberg* |
op_source |
Climate of the Past, Vol 13, Iss 5, Pp 511-531 (2017) |
op_relation |
http://www.clim-past.net/13/511/2017/cp-13-511-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-13-511-2017 https://doaj.org/article/144e22b4cd964e5b80adcedb9c5a450b |
op_doi |
https://doi.org/10.5194/cp-13-511-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
5 |
container_start_page |
511 |
op_container_end_page |
531 |
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1766314952923021312 |