Age determination and stable isotope record of sediment cores at 9°S in the Indian Ocean ...
A continuous 10-m-long section consisting of roughly two thirds Ethmodiscus rex (a diatom) and one third mixed planktonic foraminifera was identified in a core from 3800 m depth at 9°S on the Indian Ocean's 90°E Ridge. Radiocarbon dates place the onset of deposition of this layer at >30,000...
Main Authors: | , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA
2015
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.855323 https://doi.pangaea.de/10.1594/PANGAEA.855323 |
id |
ftdatacite:10.1594/pangaea.855323 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.855323 2024-09-15T18:31:02+00:00 Age determination and stable isotope record of sediment cores at 9°S in the Indian Ocean ... Broecker, Wallace S Clark, Elizabeth Lynch-Stieglitz, Jean Beck, Warren Stott, Lowell D Hajdas, Irena Bonani, Georges 2015 application/zip https://dx.doi.org/10.1594/pangaea.855323 https://doi.pangaea.de/10.1594/PANGAEA.855323 en eng PANGAEA https://dx.doi.org/10.1029/1999pa000439 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 article Collection Supplementary Publication Series of Datasets 2015 ftdatacite https://doi.org/10.1594/pangaea.85532310.1029/1999pa000439 2024-08-01T10:53:32Z A continuous 10-m-long section consisting of roughly two thirds Ethmodiscus rex (a diatom) and one third mixed planktonic foraminifera was identified in a core from 3800 m depth at 9°S on the Indian Ocean's 90°E Ridge. Radiocarbon dates place the onset of deposition of this layer at >30,000 years B.P. and its termination at close to 11,000 years B.P. However, precise dating of the foraminifera from the Ethmodiscus layer itself proved to be impossible owing to the presence of secondary calcite presumably precipitated from the pore waters. During the Holocene, high calcium carbonate content ooze free of diatoms was deposited at this locale. As the site currently lies beneath the pathway taken by upper ocean waters entering the Indian Ocean from the Pacific (via the Indonesian Straits), it appears that during glacial time, thermocline waters moving along this same path provided the silica and other nutrients required by these diatoms. ... : Supplement to: Broecker, Wallace S; Clark, Elizabeth; Lynch-Stieglitz, Jean; Beck, Warren; Stott, Lowell D; Hajdas, Irena; Bonani, Georges (2000): Late glacial diatom accumulation at 9°S in the Indian Ocean. Paleoceanography, 15(3), 348-352 ... Article in Journal/Newspaper Planktonic foraminifera DataCite |
institution |
Open Polar |
collection |
DataCite |
op_collection_id |
ftdatacite |
language |
English |
description |
A continuous 10-m-long section consisting of roughly two thirds Ethmodiscus rex (a diatom) and one third mixed planktonic foraminifera was identified in a core from 3800 m depth at 9°S on the Indian Ocean's 90°E Ridge. Radiocarbon dates place the onset of deposition of this layer at >30,000 years B.P. and its termination at close to 11,000 years B.P. However, precise dating of the foraminifera from the Ethmodiscus layer itself proved to be impossible owing to the presence of secondary calcite presumably precipitated from the pore waters. During the Holocene, high calcium carbonate content ooze free of diatoms was deposited at this locale. As the site currently lies beneath the pathway taken by upper ocean waters entering the Indian Ocean from the Pacific (via the Indonesian Straits), it appears that during glacial time, thermocline waters moving along this same path provided the silica and other nutrients required by these diatoms. ... : Supplement to: Broecker, Wallace S; Clark, Elizabeth; Lynch-Stieglitz, Jean; Beck, Warren; Stott, Lowell D; Hajdas, Irena; Bonani, Georges (2000): Late glacial diatom accumulation at 9°S in the Indian Ocean. Paleoceanography, 15(3), 348-352 ... |
format |
Article in Journal/Newspaper |
author |
Broecker, Wallace S Clark, Elizabeth Lynch-Stieglitz, Jean Beck, Warren Stott, Lowell D Hajdas, Irena Bonani, Georges |
spellingShingle |
Broecker, Wallace S Clark, Elizabeth Lynch-Stieglitz, Jean Beck, Warren Stott, Lowell D Hajdas, Irena Bonani, Georges Age determination and stable isotope record of sediment cores at 9°S in the Indian Ocean ... |
author_facet |
Broecker, Wallace S Clark, Elizabeth Lynch-Stieglitz, Jean Beck, Warren Stott, Lowell D Hajdas, Irena Bonani, Georges |
author_sort |
Broecker, Wallace S |
title |
Age determination and stable isotope record of sediment cores at 9°S in the Indian Ocean ... |
title_short |
Age determination and stable isotope record of sediment cores at 9°S in the Indian Ocean ... |
title_full |
Age determination and stable isotope record of sediment cores at 9°S in the Indian Ocean ... |
title_fullStr |
Age determination and stable isotope record of sediment cores at 9°S in the Indian Ocean ... |
title_full_unstemmed |
Age determination and stable isotope record of sediment cores at 9°S in the Indian Ocean ... |
title_sort |
age determination and stable isotope record of sediment cores at 9°s in the indian ocean ... |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://dx.doi.org/10.1594/pangaea.855323 https://doi.pangaea.de/10.1594/PANGAEA.855323 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://dx.doi.org/10.1029/1999pa000439 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.85532310.1029/1999pa000439 |
_version_ |
1810472631636328448 |