Plio-Pleistocene diatom biostratigraphy from ODP Leg 177, Atlantic sector of the Southern Ocean
Seven sites were drilled during Ocean Drilling Program Leg 177 in the Atlantic sector of the Southern Ocean (SO) on a transect over the Antarctic Circumpolar Current from the Subantarctic to the Antarctic Zone. At four sites sediments were recovered with a Pliocene/Pleistocene sediment package of up...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.678533 2024-09-15T17:43:30+00:00 Plio-Pleistocene diatom biostratigraphy from ODP Leg 177, Atlantic sector of the Southern Ocean Zielinski, Ulrich Gersonde, Rainer MEDIAN LATITUDE: -46.752092 * MEDIAN LONGITUDE: 7.131300 * SOUTH-BOUND LATITUDE: -53.180350 * WEST-BOUND LONGITUDE: 5.130333 * NORTH-BOUND LATITUDE: -40.936333 * EAST-BOUND LONGITUDE: 9.893983 * DATE/TIME START: 1997-12-19T00:00:00 * DATE/TIME END: 1998-01-20T00:00:00 2002 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.678533 https://doi.org/10.1594/PANGAEA.678533 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.678533 https://doi.org/10.1594/PANGAEA.678533 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Zielinski, Ulrich; Gersonde, Rainer (2002): Plio-Pleistocene diatom biostratigraphy from ODP Leg 177, Atlantic sector of the Southern Ocean. Marine Micropaleontology, 54(3-4), 225-268, https://doi.org/10.1016/S0377-8398(02)00031-2 177-1089 177-1090 177-1091 177-1092 177-1093 177-1094 COMPCORE Composite Core Joides Resolution Leg177 Ocean Drilling Program ODP South Atlantic Ocean dataset publication series 2002 ftpangaea https://doi.org/10.1594/PANGAEA.67853310.1016/S0377-8398(02)00031-2 2024-07-24T02:31:42Z Seven sites were drilled during Ocean Drilling Program Leg 177 in the Atlantic sector of the Southern Ocean (SO) on a transect over the Antarctic Circumpolar Current from the Subantarctic to the Antarctic Zone. At four sites sediments were recovered with a Pliocene/Pleistocene sediment package of up to 580 m allowing the refinement of previous diatom zonation concepts. Samples were analyzed on stratigraphic distribution and abundance of diatom species. A refined diatom biozonation tied to the geomagnetic polarity record is proposed. For the middle and late Pleistocene two zonations applicable to the northern and southern area of the SO were constructed, considering different latitudinal distributions of biostratigraphic diatom marker species. The southern zonation for the Pleistocene relies on the occurrence of species of the genus Rouxia, R. leventerae and R. constricta n. sp. as well as on a revised last occurrence datum (LOD) of Actinocyclus ingens (0.38 Ma, late marine isotope stage (MIS) 11). The use of these new stratigraphic marker species refines the temporal resolution for biostratigraphic age assignment to up to 0.1 Myr. In particular the LOD of R. leventerae as an indicator for the MIS 6/5 boundary (Termination II) will improve future dating of carbonate-free Antarctic sediments. These new data were obtained from sediments of Sites 1093 and 1094 (Antarctic Zone). The northern zonation for the middle and late Pleistocene time interval is based on the Pleistocene abundance pattern of Hemidiscus karstenii which was already proposed by previous investigations (e.g. Gersonde and Barcena, 1998). One new species (R. constricta) and two new combinations (Fragilariopsis clementia, Fragilariopsis reinholdii) are proposed in this study. Other/Unknown Material Antarc* Antarctic South Atlantic Ocean Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(5.130333,9.893983,-40.936333,-53.180350) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
177-1089 177-1090 177-1091 177-1092 177-1093 177-1094 COMPCORE Composite Core Joides Resolution Leg177 Ocean Drilling Program ODP South Atlantic Ocean |
spellingShingle |
177-1089 177-1090 177-1091 177-1092 177-1093 177-1094 COMPCORE Composite Core Joides Resolution Leg177 Ocean Drilling Program ODP South Atlantic Ocean Zielinski, Ulrich Gersonde, Rainer Plio-Pleistocene diatom biostratigraphy from ODP Leg 177, Atlantic sector of the Southern Ocean |
topic_facet |
177-1089 177-1090 177-1091 177-1092 177-1093 177-1094 COMPCORE Composite Core Joides Resolution Leg177 Ocean Drilling Program ODP South Atlantic Ocean |
description |
Seven sites were drilled during Ocean Drilling Program Leg 177 in the Atlantic sector of the Southern Ocean (SO) on a transect over the Antarctic Circumpolar Current from the Subantarctic to the Antarctic Zone. At four sites sediments were recovered with a Pliocene/Pleistocene sediment package of up to 580 m allowing the refinement of previous diatom zonation concepts. Samples were analyzed on stratigraphic distribution and abundance of diatom species. A refined diatom biozonation tied to the geomagnetic polarity record is proposed. For the middle and late Pleistocene two zonations applicable to the northern and southern area of the SO were constructed, considering different latitudinal distributions of biostratigraphic diatom marker species. The southern zonation for the Pleistocene relies on the occurrence of species of the genus Rouxia, R. leventerae and R. constricta n. sp. as well as on a revised last occurrence datum (LOD) of Actinocyclus ingens (0.38 Ma, late marine isotope stage (MIS) 11). The use of these new stratigraphic marker species refines the temporal resolution for biostratigraphic age assignment to up to 0.1 Myr. In particular the LOD of R. leventerae as an indicator for the MIS 6/5 boundary (Termination II) will improve future dating of carbonate-free Antarctic sediments. These new data were obtained from sediments of Sites 1093 and 1094 (Antarctic Zone). The northern zonation for the middle and late Pleistocene time interval is based on the Pleistocene abundance pattern of Hemidiscus karstenii which was already proposed by previous investigations (e.g. Gersonde and Barcena, 1998). One new species (R. constricta) and two new combinations (Fragilariopsis clementia, Fragilariopsis reinholdii) are proposed in this study. |
format |
Other/Unknown Material |
author |
Zielinski, Ulrich Gersonde, Rainer |
author_facet |
Zielinski, Ulrich Gersonde, Rainer |
author_sort |
Zielinski, Ulrich |
title |
Plio-Pleistocene diatom biostratigraphy from ODP Leg 177, Atlantic sector of the Southern Ocean |
title_short |
Plio-Pleistocene diatom biostratigraphy from ODP Leg 177, Atlantic sector of the Southern Ocean |
title_full |
Plio-Pleistocene diatom biostratigraphy from ODP Leg 177, Atlantic sector of the Southern Ocean |
title_fullStr |
Plio-Pleistocene diatom biostratigraphy from ODP Leg 177, Atlantic sector of the Southern Ocean |
title_full_unstemmed |
Plio-Pleistocene diatom biostratigraphy from ODP Leg 177, Atlantic sector of the Southern Ocean |
title_sort |
plio-pleistocene diatom biostratigraphy from odp leg 177, atlantic sector of the southern ocean |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.678533 https://doi.org/10.1594/PANGAEA.678533 |
op_coverage |
MEDIAN LATITUDE: -46.752092 * MEDIAN LONGITUDE: 7.131300 * SOUTH-BOUND LATITUDE: -53.180350 * WEST-BOUND LONGITUDE: 5.130333 * NORTH-BOUND LATITUDE: -40.936333 * EAST-BOUND LONGITUDE: 9.893983 * DATE/TIME START: 1997-12-19T00:00:00 * DATE/TIME END: 1998-01-20T00:00:00 |
long_lat |
ENVELOPE(5.130333,9.893983,-40.936333,-53.180350) |
genre |
Antarc* Antarctic South Atlantic Ocean Southern Ocean |
genre_facet |
Antarc* Antarctic South Atlantic Ocean Southern Ocean |
op_source |
Supplement to: Zielinski, Ulrich; Gersonde, Rainer (2002): Plio-Pleistocene diatom biostratigraphy from ODP Leg 177, Atlantic sector of the Southern Ocean. Marine Micropaleontology, 54(3-4), 225-268, https://doi.org/10.1016/S0377-8398(02)00031-2 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.678533 https://doi.org/10.1594/PANGAEA.678533 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.67853310.1016/S0377-8398(02)00031-2 |
_version_ |
1810490495246270464 |