Deep and bottom water export from the Southern Ocean to the Pacific Ocean over the past 38 million years
The application of radiogenic isotopes to the study of Cenozoic circulation patterns in the South Pacific Ocean has been hampered by the fact that records from only equatorial Pacific deep water have been available. We present new Pb and Nd isotope time series for two ferromanganese crusts that grew...
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AGU (American Geophysical Union)
2004
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Online Access: | https://oceanrep.geomar.de/id/eprint/4241/ https://oceanrep.geomar.de/id/eprint/4241/1/palo1080.pdf https://doi.org/10.1029/2003PA000923 |
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ftoceanrep:oai:oceanrep.geomar.de:4241 2024-09-15T17:48:37+00:00 Deep and bottom water export from the Southern Ocean to the Pacific Ocean over the past 38 million years van de Flierdt, T. Frank, Martin Halliday, A. N. Hein, J. R. Hattendorf, B. Günther, D. Kubik, P. W. 2004 text https://oceanrep.geomar.de/id/eprint/4241/ https://oceanrep.geomar.de/id/eprint/4241/1/palo1080.pdf https://doi.org/10.1029/2003PA000923 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/4241/1/palo1080.pdf van de Flierdt, T., Frank, M. , Halliday, A. N., Hein, J. R., Hattendorf, B., Günther, D. and Kubik, P. W. (2004) Deep and bottom water export from the Southern Ocean to the Pacific Ocean over the past 38 million years. Paleoceanography, 19 . PA1020. DOI 10.1029/2003PA000923 <https://doi.org/10.1029/2003PA000923>. doi:10.1029/2003PA000923 info:eu-repo/semantics/embargoedAccess Article PeerReviewed 2004 ftoceanrep https://doi.org/10.1029/2003PA000923 2024-09-04T05:04:40Z The application of radiogenic isotopes to the study of Cenozoic circulation patterns in the South Pacific Ocean has been hampered by the fact that records from only equatorial Pacific deep water have been available. We present new Pb and Nd isotope time series for two ferromanganese crusts that grew from equatorial Pacific bottom water (D137-01, “Nova,” 7219 m water depth) and southwest Pacific deep water (63KD, “Tasman,” 1700 m water depth). The crusts were dated using 10Be/9Be ratios combined with constant Co-flux dating and yield time series for the past 38 and 23 Myr, respectively. The surface Nd and Pb isotope distributions are consistent with the present-day circulation pattern, and therefore the new records are considered suitable to reconstruct Eocene through Miocene paleoceanography for the South Pacific. The isotope time series of crusts Nova and Tasman suggest that equatorial Pacific deep water and waters from the Southern Ocean supplied the dissolved trace metals to both sites over the past 38 Myr. Changes in the isotopic composition of crust Nova are interpreted to reflect development of the Antarctic Circumpolar Current and changes in Pacific deep water circulation caused by the build up of the East Antarctic Ice Sheet. The Nd isotopic composition of the shallower water site in the southwest Pacific appears to have been more sensitive to circulation changes resulting from closure of the Indonesian seaway. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Paleoceanography 19 1 n/a n/a |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The application of radiogenic isotopes to the study of Cenozoic circulation patterns in the South Pacific Ocean has been hampered by the fact that records from only equatorial Pacific deep water have been available. We present new Pb and Nd isotope time series for two ferromanganese crusts that grew from equatorial Pacific bottom water (D137-01, “Nova,” 7219 m water depth) and southwest Pacific deep water (63KD, “Tasman,” 1700 m water depth). The crusts were dated using 10Be/9Be ratios combined with constant Co-flux dating and yield time series for the past 38 and 23 Myr, respectively. The surface Nd and Pb isotope distributions are consistent with the present-day circulation pattern, and therefore the new records are considered suitable to reconstruct Eocene through Miocene paleoceanography for the South Pacific. The isotope time series of crusts Nova and Tasman suggest that equatorial Pacific deep water and waters from the Southern Ocean supplied the dissolved trace metals to both sites over the past 38 Myr. Changes in the isotopic composition of crust Nova are interpreted to reflect development of the Antarctic Circumpolar Current and changes in Pacific deep water circulation caused by the build up of the East Antarctic Ice Sheet. The Nd isotopic composition of the shallower water site in the southwest Pacific appears to have been more sensitive to circulation changes resulting from closure of the Indonesian seaway. |
format |
Article in Journal/Newspaper |
author |
van de Flierdt, T. Frank, Martin Halliday, A. N. Hein, J. R. Hattendorf, B. Günther, D. Kubik, P. W. |
spellingShingle |
van de Flierdt, T. Frank, Martin Halliday, A. N. Hein, J. R. Hattendorf, B. Günther, D. Kubik, P. W. Deep and bottom water export from the Southern Ocean to the Pacific Ocean over the past 38 million years |
author_facet |
van de Flierdt, T. Frank, Martin Halliday, A. N. Hein, J. R. Hattendorf, B. Günther, D. Kubik, P. W. |
author_sort |
van de Flierdt, T. |
title |
Deep and bottom water export from the Southern Ocean to the Pacific Ocean over the past 38 million years |
title_short |
Deep and bottom water export from the Southern Ocean to the Pacific Ocean over the past 38 million years |
title_full |
Deep and bottom water export from the Southern Ocean to the Pacific Ocean over the past 38 million years |
title_fullStr |
Deep and bottom water export from the Southern Ocean to the Pacific Ocean over the past 38 million years |
title_full_unstemmed |
Deep and bottom water export from the Southern Ocean to the Pacific Ocean over the past 38 million years |
title_sort |
deep and bottom water export from the southern ocean to the pacific ocean over the past 38 million years |
publisher |
AGU (American Geophysical Union) |
publishDate |
2004 |
url |
https://oceanrep.geomar.de/id/eprint/4241/ https://oceanrep.geomar.de/id/eprint/4241/1/palo1080.pdf https://doi.org/10.1029/2003PA000923 |
genre |
Antarc* Antarctic Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/4241/1/palo1080.pdf van de Flierdt, T., Frank, M. , Halliday, A. N., Hein, J. R., Hattendorf, B., Günther, D. and Kubik, P. W. (2004) Deep and bottom water export from the Southern Ocean to the Pacific Ocean over the past 38 million years. Paleoceanography, 19 . PA1020. DOI 10.1029/2003PA000923 <https://doi.org/10.1029/2003PA000923>. doi:10.1029/2003PA000923 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1029/2003PA000923 |
container_title |
Paleoceanography |
container_volume |
19 |
container_issue |
1 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1810290060613910528 |