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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Dataset Open Access |
| Langue: | en |
| Publié: |
PANGAEA
2009
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| Sujets: | |
| Accès en ligne: | https://doi.org/10.1594/PANGAEA.817589 |
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| _version_ | 1867171366233440256 |
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| author | Knies, Jochen Matthiessen, Jens Vogt, Christoph Laberg, Jan Sverre Hjelstuen, Berit O Smelror, Morten Larsen, Eiliv Andreassen, Karin Eidvin, Tor Vorren, Tore O |
| author_facet | Knies, Jochen Matthiessen, Jens Vogt, Christoph Laberg, Jan Sverre Hjelstuen, Berit O Smelror, Morten Larsen, Eiliv Andreassen, Karin Eidvin, Tor Vorren, Tore O |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Based on a revised chronostratigraphy, and compilation of borehole data from the Barents Sea continental margin, a coherent glaciation model is proposed for the Barents Sea ice sheet over the past 3.5 million years (Ma). Three phases of ice growth are suggested: (1) The initial build-up phase, covering mountainous regions and reaching the coastline/shelf edge in the northern Barents Sea during short-term glacial intensification, is concomitant with the onset of the Northern Hemisphere Glaciation (3.6-2.4 Ma). (2) A transitional growth phase (2.4-1.0 Ma), during which the ice sheet expanded towards the southern Barents Sea and reached the northwestern Kara Sea. This is inferred from step-wise decrease of Siberian river-supplied smectite-rich sediments, likely caused by ice sheet blockade and possibly reduced sea ice formation in the Kara Sea as well as glacigenic wedge growth along the northwestern Barents Sea margin hampering entrainment and transport of sea ice sediments to the Arctic-Atlantic gateway. (3) Finally, large-scale glaciation in the Barents Sea occurred after 1 Ma with repeated advances to the shelf edge. The timing is inferred from ice grounding on the Yermak Plateau at about 0.95 Ma, and higher frequencies of gravity-driven mass movements along the western Barents Sea margin associated with expansive glacial growth. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_817589 |
| institution | PANGAEA |
| language | en |
| publishDate | 2009 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Age models of ODP sites from the Barents Sea-Svalbard region Knies, Jochen Matthiessen, Jens Vogt, Christoph Laberg, Jan Sverre Hjelstuen, Berit O Smelror, Morten Larsen, Eiliv Andreassen, Karin Eidvin, Tor Vorren, Tore O Ocean Drilling Program; ODP Based on a revised chronostratigraphy, and compilation of borehole data from the Barents Sea continental margin, a coherent glaciation model is proposed for the Barents Sea ice sheet over the past 3.5 million years (Ma). Three phases of ice growth are suggested: (1) The initial build-up phase, covering mountainous regions and reaching the coastline/shelf edge in the northern Barents Sea during short-term glacial intensification, is concomitant with the onset of the Northern Hemisphere Glaciation (3.6-2.4 Ma). (2) A transitional growth phase (2.4-1.0 Ma), during which the ice sheet expanded towards the southern Barents Sea and reached the northwestern Kara Sea. This is inferred from step-wise decrease of Siberian river-supplied smectite-rich sediments, likely caused by ice sheet blockade and possibly reduced sea ice formation in the Kara Sea as well as glacigenic wedge growth along the northwestern Barents Sea margin hampering entrainment and transport of sea ice sediments to the Arctic-Atlantic gateway. (3) Finally, large-scale glaciation in the Barents Sea occurred after 1 Ma with repeated advances to the shelf edge. The timing is inferred from ice grounding on the Yermak Plateau at about 0.95 Ma, and higher frequencies of gravity-driven mass movements along the western Barents Sea margin associated with expansive glacial growth. |
| title | Age models of ODP sites from the Barents Sea-Svalbard region |
| topic | Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.817589 |