Isotopic constraints on ocean redox at the end of the Eocene
A multi-million-year decrease in global temperatures during the Eocene was accompanied by large reorganisations to ocean circulation, ocean chemistry and biological productivity. These changes culminated in the rapid growth of grounded ice on Antarctica during the Eocene–Oligocene climate transition...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://oro.open.ac.uk/75601/ https://oro.open.ac.uk/75601/1/1-s2.0-S0012821X2100073X-main.pdf https://doi.org/10.1016/j.epsl.2021.116814 |
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ftopenunivgb:oai:oro.open.ac.uk:75601 2023-06-11T04:07:12+02:00 Isotopic constraints on ocean redox at the end of the Eocene Dickson, Alexander J. Bagard, Marie-Laure Katchinoff, Joachim A.R. Davies, Marc Poulton, Simon W. Cohen, Anthony S. 2021-05-15 application/pdf https://oro.open.ac.uk/75601/ https://oro.open.ac.uk/75601/1/1-s2.0-S0012821X2100073X-main.pdf https://doi.org/10.1016/j.epsl.2021.116814 unknown https://oro.open.ac.uk/75601/1/1-s2.0-S0012821X2100073X-main.pdf Dickson, Alexander J.; Bagard, Marie-Laure <http://oro.open.ac.uk/view/person/mb28757.html>; Katchinoff, Joachim A.R.; Davies, Marc <http://oro.open.ac.uk/view/person/mkd42.html>; Poulton, Simon W. and Cohen, Anthony S. <http://oro.open.ac.uk/view/person/asc4.html> (2021). Isotopic constraints on ocean redox at the end of the Eocene. Earth and Planetary Science Letters, 562, article no. 116814. Journal Item Public PeerReviewed 2021 ftopenunivgb https://doi.org/10.1016/j.epsl.2021.116814 2023-05-28T06:05:12Z A multi-million-year decrease in global temperatures during the Eocene was accompanied by large reorganisations to ocean circulation, ocean chemistry and biological productivity. These changes culminated in the rapid growth of grounded ice on Antarctica during the Eocene–Oligocene climate transition (EOT), ∼34 million years ago. However, while it is likely that environmental perturbations of this magnitude altered the oceanic oxygen inventory, the sign and magnitude of the response is poorly constrained. We show that euxinic, hydrographically restricted conditions developed in the Austrian Molasse Basin during the EOT. The isotopic compositions of molybdenum and uranium captured by sediments accumulating in the Molasse Basin at this time reveal that the global extent of sulfidic conditions during the EOT was not appreciably different to that of the Early Eocene greenhouse world. Our results suggest that the early Cenozoic oceans were buffered against extreme long-term changes in oxygenation. Article in Journal/Newspaper Antarc* Antarctica The Open University: Open Research Online (ORO) Earth and Planetary Science Letters 562 116814 |
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Open Polar |
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The Open University: Open Research Online (ORO) |
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ftopenunivgb |
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A multi-million-year decrease in global temperatures during the Eocene was accompanied by large reorganisations to ocean circulation, ocean chemistry and biological productivity. These changes culminated in the rapid growth of grounded ice on Antarctica during the Eocene–Oligocene climate transition (EOT), ∼34 million years ago. However, while it is likely that environmental perturbations of this magnitude altered the oceanic oxygen inventory, the sign and magnitude of the response is poorly constrained. We show that euxinic, hydrographically restricted conditions developed in the Austrian Molasse Basin during the EOT. The isotopic compositions of molybdenum and uranium captured by sediments accumulating in the Molasse Basin at this time reveal that the global extent of sulfidic conditions during the EOT was not appreciably different to that of the Early Eocene greenhouse world. Our results suggest that the early Cenozoic oceans were buffered against extreme long-term changes in oxygenation. |
format |
Article in Journal/Newspaper |
author |
Dickson, Alexander J. Bagard, Marie-Laure Katchinoff, Joachim A.R. Davies, Marc Poulton, Simon W. Cohen, Anthony S. |
spellingShingle |
Dickson, Alexander J. Bagard, Marie-Laure Katchinoff, Joachim A.R. Davies, Marc Poulton, Simon W. Cohen, Anthony S. Isotopic constraints on ocean redox at the end of the Eocene |
author_facet |
Dickson, Alexander J. Bagard, Marie-Laure Katchinoff, Joachim A.R. Davies, Marc Poulton, Simon W. Cohen, Anthony S. |
author_sort |
Dickson, Alexander J. |
title |
Isotopic constraints on ocean redox at the end of the Eocene |
title_short |
Isotopic constraints on ocean redox at the end of the Eocene |
title_full |
Isotopic constraints on ocean redox at the end of the Eocene |
title_fullStr |
Isotopic constraints on ocean redox at the end of the Eocene |
title_full_unstemmed |
Isotopic constraints on ocean redox at the end of the Eocene |
title_sort |
isotopic constraints on ocean redox at the end of the eocene |
publishDate |
2021 |
url |
https://oro.open.ac.uk/75601/ https://oro.open.ac.uk/75601/1/1-s2.0-S0012821X2100073X-main.pdf https://doi.org/10.1016/j.epsl.2021.116814 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://oro.open.ac.uk/75601/1/1-s2.0-S0012821X2100073X-main.pdf Dickson, Alexander J.; Bagard, Marie-Laure <http://oro.open.ac.uk/view/person/mb28757.html>; Katchinoff, Joachim A.R.; Davies, Marc <http://oro.open.ac.uk/view/person/mkd42.html>; Poulton, Simon W. and Cohen, Anthony S. <http://oro.open.ac.uk/view/person/asc4.html> (2021). Isotopic constraints on ocean redox at the end of the Eocene. Earth and Planetary Science Letters, 562, article no. 116814. |
op_doi |
https://doi.org/10.1016/j.epsl.2021.116814 |
container_title |
Earth and Planetary Science Letters |
container_volume |
562 |
container_start_page |
116814 |
_version_ |
1768380106082877440 |