Sedimentary record of the last glaciation of the Bellingshausen Sea, West Antarctica
Upper Quaternary marine sediments recovered from the West Antarctic continental margin are characterized by a distinct lithological succession allowing the reconstruction of past environmental changes. Massive, homogenous diamictons were deposited elsewhere on the margin during the last glacial peri...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.711337 2023-05-15T13:42:09+02:00 Sedimentary record of the last glaciation of the Bellingshausen Sea, West Antarctica Hillenbrand, Claus-Dieter Baesler, Anja Grobe, Hannes MEDIAN LATITUDE: -70.273333 * MEDIAN LONGITUDE: -87.581887 * SOUTH-BOUND LATITUDE: -71.025000 * WEST-BOUND LONGITUDE: -88.924000 * NORTH-BOUND LATITUDE: -69.730000 * EAST-BOUND LONGITUDE: -85.898330 * DATE/TIME START: 1994-02-13T18:50:00 * DATE/TIME END: 1994-02-17T13:15:00 2005-01-15 application/zip, 15 datasets https://doi.pangaea.de/10.1594/PANGAEA.711337 https://doi.org/10.1594/PANGAEA.711337 en eng PANGAEA Baesler, Anja (2003): Glazialmarine Sedimentation am westantarktischen Kontinentalrand (zentrales Bellingshausenmeer) im Verlauf des letzten Glazial-Interglazial-Zyklus. Diploma Thesis, Geographisches Institut der Georg-August-Universität zu Göttingen & Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, 60 pp, hdl:10013/epic.6e8162eb-5d28-45ef-8ed7-48152551d3a4 https://doi.pangaea.de/10.1594/PANGAEA.711337 https://doi.org/10.1594/PANGAEA.711337 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hillenbrand, Claus-Dieter; Baesler, Anja; Grobe, Hannes (2005): The sedimentary record of the last glaciation in the western Bellingshausen Sea (West Antarctica): Implications for the interpretation of diamictons in a polar-marine setting. Marine Geology, 216(4), 191-204, https://doi.org/10.1016/j.margeo.2005.01.007 ANT-XI/3 AWI_Paleo Bellingshausen Sea Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS2533-2 PS2538-2 PS2540-3 PS29 PS29/040 PS29/046 PS29/048 SL Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.711337 https://doi.org/10.1016/j.margeo.2005.01.007 2023-01-20T07:31:20Z Upper Quaternary marine sediments recovered from the West Antarctic continental margin are characterized by a distinct lithological succession allowing the reconstruction of past environmental changes. Massive, homogenous diamictons were deposited elsewhere on the margin during the last glacial period, when grounded ice masses advanced across the shelf. Sedimentological investigations using a multi-proxy approach and examination of the margin topography suggest that during this time a deformation till and subsequently a glaciomarine till were deposited on the shelf, while glaciogenic debris flows were deposited on the slope and rise. The comparison of the clay mineral assemblages in the matrix of the diamictons with clay mineral assemblages of potential source areas reveals distinct pathways of grounded ice flow on the shelf. Lithogenic sandy muds overlying the diamictons were deposited by meltwater flows and/or marine currents on the shelf, and by turbidity currents and marine currents on the slope and rise, respectively. The sedimentation of the sandy muds denotes a deglaciation stage, when grounded ice started to retreat from the shelf, but semi-permanent sea-ice coverage still hampered biological productivity. Bioturbated, foraminifer-bearing sediments were deposited in a glaciomarine setting during the present interglacial period, when sea-ice cover was only seasonally present and a marine current related to the southern boundary of the Antarctic Circumpolar Current winnowed the seafloor on the outer shelf, slope and rise. Dataset Antarc* Antarctic Antarctica Bellingshausen Sea Sea ice West Antarctica PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Bellingshausen Sea The Antarctic West Antarctica ENVELOPE(-88.924000,-85.898330,-69.730000,-71.025000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XI/3 AWI_Paleo Bellingshausen Sea Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS2533-2 PS2538-2 PS2540-3 PS29 PS29/040 PS29/046 PS29/048 SL |
spellingShingle |
ANT-XI/3 AWI_Paleo Bellingshausen Sea Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS2533-2 PS2538-2 PS2540-3 PS29 PS29/040 PS29/046 PS29/048 SL Hillenbrand, Claus-Dieter Baesler, Anja Grobe, Hannes Sedimentary record of the last glaciation of the Bellingshausen Sea, West Antarctica |
topic_facet |
ANT-XI/3 AWI_Paleo Bellingshausen Sea Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS2533-2 PS2538-2 PS2540-3 PS29 PS29/040 PS29/046 PS29/048 SL |
description |
Upper Quaternary marine sediments recovered from the West Antarctic continental margin are characterized by a distinct lithological succession allowing the reconstruction of past environmental changes. Massive, homogenous diamictons were deposited elsewhere on the margin during the last glacial period, when grounded ice masses advanced across the shelf. Sedimentological investigations using a multi-proxy approach and examination of the margin topography suggest that during this time a deformation till and subsequently a glaciomarine till were deposited on the shelf, while glaciogenic debris flows were deposited on the slope and rise. The comparison of the clay mineral assemblages in the matrix of the diamictons with clay mineral assemblages of potential source areas reveals distinct pathways of grounded ice flow on the shelf. Lithogenic sandy muds overlying the diamictons were deposited by meltwater flows and/or marine currents on the shelf, and by turbidity currents and marine currents on the slope and rise, respectively. The sedimentation of the sandy muds denotes a deglaciation stage, when grounded ice started to retreat from the shelf, but semi-permanent sea-ice coverage still hampered biological productivity. Bioturbated, foraminifer-bearing sediments were deposited in a glaciomarine setting during the present interglacial period, when sea-ice cover was only seasonally present and a marine current related to the southern boundary of the Antarctic Circumpolar Current winnowed the seafloor on the outer shelf, slope and rise. |
format |
Dataset |
author |
Hillenbrand, Claus-Dieter Baesler, Anja Grobe, Hannes |
author_facet |
Hillenbrand, Claus-Dieter Baesler, Anja Grobe, Hannes |
author_sort |
Hillenbrand, Claus-Dieter |
title |
Sedimentary record of the last glaciation of the Bellingshausen Sea, West Antarctica |
title_short |
Sedimentary record of the last glaciation of the Bellingshausen Sea, West Antarctica |
title_full |
Sedimentary record of the last glaciation of the Bellingshausen Sea, West Antarctica |
title_fullStr |
Sedimentary record of the last glaciation of the Bellingshausen Sea, West Antarctica |
title_full_unstemmed |
Sedimentary record of the last glaciation of the Bellingshausen Sea, West Antarctica |
title_sort |
sedimentary record of the last glaciation of the bellingshausen sea, west antarctica |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.711337 https://doi.org/10.1594/PANGAEA.711337 |
op_coverage |
MEDIAN LATITUDE: -70.273333 * MEDIAN LONGITUDE: -87.581887 * SOUTH-BOUND LATITUDE: -71.025000 * WEST-BOUND LONGITUDE: -88.924000 * NORTH-BOUND LATITUDE: -69.730000 * EAST-BOUND LONGITUDE: -85.898330 * DATE/TIME START: 1994-02-13T18:50:00 * DATE/TIME END: 1994-02-17T13:15:00 |
long_lat |
ENVELOPE(-88.924000,-85.898330,-69.730000,-71.025000) |
geographic |
Antarctic Bellingshausen Sea The Antarctic West Antarctica |
geographic_facet |
Antarctic Bellingshausen Sea The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica Bellingshausen Sea Sea ice West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Bellingshausen Sea Sea ice West Antarctica |
op_source |
Supplement to: Hillenbrand, Claus-Dieter; Baesler, Anja; Grobe, Hannes (2005): The sedimentary record of the last glaciation in the western Bellingshausen Sea (West Antarctica): Implications for the interpretation of diamictons in a polar-marine setting. Marine Geology, 216(4), 191-204, https://doi.org/10.1016/j.margeo.2005.01.007 |
op_relation |
Baesler, Anja (2003): Glazialmarine Sedimentation am westantarktischen Kontinentalrand (zentrales Bellingshausenmeer) im Verlauf des letzten Glazial-Interglazial-Zyklus. Diploma Thesis, Geographisches Institut der Georg-August-Universität zu Göttingen & Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, 60 pp, hdl:10013/epic.6e8162eb-5d28-45ef-8ed7-48152551d3a4 https://doi.pangaea.de/10.1594/PANGAEA.711337 https://doi.org/10.1594/PANGAEA.711337 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.711337 https://doi.org/10.1016/j.margeo.2005.01.007 |
_version_ |
1766163441908711424 |