Sedimentology of cores from the shelf of Lazarev Sea, East Antarctica
Distinct facies types, classified in radiocarbon-dated sediments from the shelf of the Lazarev Sea, East Antarctica, reveal a detailed history of processes that have controlled sedimentation during the deglaciation over the last 10,000 yr. The ice retreat on this part of the Antarctic shelf started...
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1997
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.726640 https://doi.org/10.1594/PANGAEA.726640 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.726640 2023-05-15T13:42:09+02:00 Sedimentology of cores from the shelf of Lazarev Sea, East Antarctica Gingele, Franz Kuhn, Gerhard Maus, Bastian Melles, Martin Schöne, Tilo MEDIAN LATITUDE: -69.958778 * MEDIAN LONGITUDE: 11.998380 * SOUTH-BOUND LATITUDE: -70.012860 * WEST-BOUND LONGITUDE: 11.493500 * NORTH-BOUND LATITUDE: -69.799667 * EAST-BOUND LONGITUDE: 12.794667 * DATE/TIME START: 1991-02-21T15:27:00 * DATE/TIME END: 1992-03-10T20:05:00 1997-08-20 application/zip, 21 datasets https://doi.pangaea.de/10.1594/PANGAEA.726640 https://doi.org/10.1594/PANGAEA.726640 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.726640 https://doi.org/10.1594/PANGAEA.726640 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Gingele, Franz; Kuhn, Gerhard; Maus, Bastian; Melles, Martin; Schöne, Tilo (1997): Holocene ice retreat from the Lazarev Sea shelf, East Antarctica. Continental Shelf Research, 17(2), 137-163, https://doi.org/10.1016/S0278-4343(96)00026-X ANT-IX/3 ANT-X/2 AWI_Paleo Giant box corer GKG Gravity corer (Kiel type) Lazarev Sea Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS18 PS18/175 PS18/208 PS18/209 PS20 PS20/219 PS20/221 PS20/222 PS2028-1 PS2028-2 PS2028-4 PS2057-2 PS2058-1 PS2058-2 PS2226-3 PS2227-1 PS2228-2 SL Weddell Sea Dataset 1997 ftpangaea https://doi.org/10.1594/PANGAEA.726640 https://doi.org/10.1016/S0278-4343(96)00026-X 2023-01-20T07:31:29Z Distinct facies types, classified in radiocarbon-dated sediments from the shelf of the Lazarev Sea, East Antarctica, reveal a detailed history of processes that have controlled sedimentation during the deglaciation over the last 10,000 yr. The ice retreat on this part of the Antarctic shelf started 9500 yr BP, marked by the deposition of laminated sediments, deposited from a floating ice shelf. These laminites, which occur on top of diamictons laid down from a grounded ice sheet, are the basal sediments of the postglacial sequence. The intensity of the Antarctic Coastal Current (ACC), directed by shelf morphology, controlled sedimentation of the postglacial facies. A residual glaciomarine sediment with the fine fraction winnowed by strong currents developed from 9000-8000 yr BP in the western part of the investigation area and from 9000-5000 yr BP in the eastern part, closer to the prominent 'Fenno Deep' trough. Current velocities apparently decreased between 8000 and 2000 yr BP due to a deflection of the ACC by advancing ice tongues to the east of the investigation area during the 'Hypsithermal'. This led to a deposition of fine-grained sediments, and clay mineralogy suggests a continental source, possibly near the grounding line of the Nivl Ice Shelf, rather than a winnowing of sediments near the shelf break or advection from deeper water. Current velocities intensified after 2000 yr BP, removed fine material from these sediments and led to a relict sediment, consisting of coarse bryozoan and molluscan debris. Dataset Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Lazarev Sea Nivl Ice Shelf Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic The Antarctic Weddell Sea East Antarctica Weddell Lazarev ENVELOPE(12.917,12.917,-69.967,-69.967) Lazarev Sea ENVELOPE(7.000,7.000,-68.000,-68.000) ENVELOPE(11.493500,12.794667,-69.799667,-70.012860) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-IX/3 ANT-X/2 AWI_Paleo Giant box corer GKG Gravity corer (Kiel type) Lazarev Sea Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS18 PS18/175 PS18/208 PS18/209 PS20 PS20/219 PS20/221 PS20/222 PS2028-1 PS2028-2 PS2028-4 PS2057-2 PS2058-1 PS2058-2 PS2226-3 PS2227-1 PS2228-2 SL Weddell Sea |
spellingShingle |
ANT-IX/3 ANT-X/2 AWI_Paleo Giant box corer GKG Gravity corer (Kiel type) Lazarev Sea Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS18 PS18/175 PS18/208 PS18/209 PS20 PS20/219 PS20/221 PS20/222 PS2028-1 PS2028-2 PS2028-4 PS2057-2 PS2058-1 PS2058-2 PS2226-3 PS2227-1 PS2228-2 SL Weddell Sea Gingele, Franz Kuhn, Gerhard Maus, Bastian Melles, Martin Schöne, Tilo Sedimentology of cores from the shelf of Lazarev Sea, East Antarctica |
topic_facet |
ANT-IX/3 ANT-X/2 AWI_Paleo Giant box corer GKG Gravity corer (Kiel type) Lazarev Sea Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS18 PS18/175 PS18/208 PS18/209 PS20 PS20/219 PS20/221 PS20/222 PS2028-1 PS2028-2 PS2028-4 PS2057-2 PS2058-1 PS2058-2 PS2226-3 PS2227-1 PS2228-2 SL Weddell Sea |
description |
Distinct facies types, classified in radiocarbon-dated sediments from the shelf of the Lazarev Sea, East Antarctica, reveal a detailed history of processes that have controlled sedimentation during the deglaciation over the last 10,000 yr. The ice retreat on this part of the Antarctic shelf started 9500 yr BP, marked by the deposition of laminated sediments, deposited from a floating ice shelf. These laminites, which occur on top of diamictons laid down from a grounded ice sheet, are the basal sediments of the postglacial sequence. The intensity of the Antarctic Coastal Current (ACC), directed by shelf morphology, controlled sedimentation of the postglacial facies. A residual glaciomarine sediment with the fine fraction winnowed by strong currents developed from 9000-8000 yr BP in the western part of the investigation area and from 9000-5000 yr BP in the eastern part, closer to the prominent 'Fenno Deep' trough. Current velocities apparently decreased between 8000 and 2000 yr BP due to a deflection of the ACC by advancing ice tongues to the east of the investigation area during the 'Hypsithermal'. This led to a deposition of fine-grained sediments, and clay mineralogy suggests a continental source, possibly near the grounding line of the Nivl Ice Shelf, rather than a winnowing of sediments near the shelf break or advection from deeper water. Current velocities intensified after 2000 yr BP, removed fine material from these sediments and led to a relict sediment, consisting of coarse bryozoan and molluscan debris. |
format |
Dataset |
author |
Gingele, Franz Kuhn, Gerhard Maus, Bastian Melles, Martin Schöne, Tilo |
author_facet |
Gingele, Franz Kuhn, Gerhard Maus, Bastian Melles, Martin Schöne, Tilo |
author_sort |
Gingele, Franz |
title |
Sedimentology of cores from the shelf of Lazarev Sea, East Antarctica |
title_short |
Sedimentology of cores from the shelf of Lazarev Sea, East Antarctica |
title_full |
Sedimentology of cores from the shelf of Lazarev Sea, East Antarctica |
title_fullStr |
Sedimentology of cores from the shelf of Lazarev Sea, East Antarctica |
title_full_unstemmed |
Sedimentology of cores from the shelf of Lazarev Sea, East Antarctica |
title_sort |
sedimentology of cores from the shelf of lazarev sea, east antarctica |
publisher |
PANGAEA |
publishDate |
1997 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.726640 https://doi.org/10.1594/PANGAEA.726640 |
op_coverage |
MEDIAN LATITUDE: -69.958778 * MEDIAN LONGITUDE: 11.998380 * SOUTH-BOUND LATITUDE: -70.012860 * WEST-BOUND LONGITUDE: 11.493500 * NORTH-BOUND LATITUDE: -69.799667 * EAST-BOUND LONGITUDE: 12.794667 * DATE/TIME START: 1991-02-21T15:27:00 * DATE/TIME END: 1992-03-10T20:05:00 |
long_lat |
ENVELOPE(12.917,12.917,-69.967,-69.967) ENVELOPE(7.000,7.000,-68.000,-68.000) ENVELOPE(11.493500,12.794667,-69.799667,-70.012860) |
geographic |
Antarctic The Antarctic Weddell Sea East Antarctica Weddell Lazarev Lazarev Sea |
geographic_facet |
Antarctic The Antarctic Weddell Sea East Antarctica Weddell Lazarev Lazarev Sea |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Lazarev Sea Nivl Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Lazarev Sea Nivl Ice Shelf Weddell Sea |
op_source |
Supplement to: Gingele, Franz; Kuhn, Gerhard; Maus, Bastian; Melles, Martin; Schöne, Tilo (1997): Holocene ice retreat from the Lazarev Sea shelf, East Antarctica. Continental Shelf Research, 17(2), 137-163, https://doi.org/10.1016/S0278-4343(96)00026-X |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.726640 https://doi.org/10.1594/PANGAEA.726640 |
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.726640 https://doi.org/10.1016/S0278-4343(96)00026-X |
_version_ |
1766163529159671808 |