Large Igneous Province Control on Ocean Anoxia and Eutrophication in the North Sea at the Paleocene–Eocene Thermal Maximum
The Paleocene–Eocene Thermal Maximum (PETM) was a global hyperthermal event ∼56 Ma characterized by massive input of carbon into the ocean–atmosphere system and global warming. A leading hypothesis for its trigger is the emplacement of the North Atlantic Igneous Province (NAIP), with extensive extru...
Published in: | Paleoceanography and Paleoclimatology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Geophysical Union
2024
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Online Access: | http://nora.nerc.ac.uk/id/eprint/537348/ https://nora.nerc.ac.uk/id/eprint/537348/1/Paleoceanog%20and%20Paleoclimatol%20-%202024%20-%20Mariani%20-%20Large%20Igneous%20Province%20Control%20on%20Ocean%20Anoxia%20and%20Eutrophication%20in%20the.pdf https://doi.org/10.1029/2023PA004756 |
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ftnerc:oai:nora.nerc.ac.uk:537348 2024-05-19T07:36:40+00:00 Large Igneous Province Control on Ocean Anoxia and Eutrophication in the North Sea at the Paleocene–Eocene Thermal Maximum Mariani, Erica Kender, Sev Hesselbo, Stephen P. Bogus, Kara Littler, Kate Riding, James B. Leng, Melanie J. Kemp, Simon J. Dybkjær, Karen Pedersen, Gunver K. Wagner, Thomas Dickson, Alexander J. 2024-04-24 text http://nora.nerc.ac.uk/id/eprint/537348/ https://nora.nerc.ac.uk/id/eprint/537348/1/Paleoceanog%20and%20Paleoclimatol%20-%202024%20-%20Mariani%20-%20Large%20Igneous%20Province%20Control%20on%20Ocean%20Anoxia%20and%20Eutrophication%20in%20the.pdf https://doi.org/10.1029/2023PA004756 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/537348/1/Paleoceanog%20and%20Paleoclimatol%20-%202024%20-%20Mariani%20-%20Large%20Igneous%20Province%20Control%20on%20Ocean%20Anoxia%20and%20Eutrophication%20in%20the.pdf Mariani, Erica; Kender, Sev; Hesselbo, Stephen P.; Bogus, Kara; Littler, Kate; Riding, James B. orcid:0000-0002-5529-8989 Leng, Melanie J. orcid:0000-0003-1115-5166 Kemp, Simon J. orcid:0000-0002-4604-0927 Dybkjær, Karen; Pedersen, Gunver K.; Wagner, Thomas; Dickson, Alexander J. 2024 Large Igneous Province Control on Ocean Anoxia and Eutrophication in the North Sea at the Paleocene–Eocene Thermal Maximum. Paleoceanography and Paleoclimatology, 39 (4), e2023PA004756. https://doi.org/10.1029/2023PA004756 <https://doi.org/10.1029/2023PA004756> cc_by_4 Publication - Article PeerReviewed 2024 ftnerc https://doi.org/10.1029/2023PA004756 2024-04-30T23:32:31Z The Paleocene–Eocene Thermal Maximum (PETM) was a global hyperthermal event ∼56 Ma characterized by massive input of carbon into the ocean–atmosphere system and global warming. A leading hypothesis for its trigger is the emplacement of the North Atlantic Igneous Province (NAIP), with extensive extrusion/intrusion of igneous material into nearby sedimentary basins, forcing local uplift and warming-inducing carbon emissions. It remains unclear if oceanographic changes in the North Sea–Norwegian Sea–Arctic basins, such as anoxia and productivity, were causally linked to local NAIP uplift/activity, and at what time scales these perturbations occurred. To test mechanisms and time scales, we present geochemical proxies (XRF analysis, clay mineralogy, molybdenum isotopes, and pyrite framboid size distribution) in undisrupted marine sediment core E−8X located in the central North Sea. We find evidence for a rapid onset of anoxia/euxinia at the negative carbon isotope excursion from redox proxies, followed by a gradual drawdown of molybdenum/total organic carbon (Mo/TOC) during the PETM main phase indicative of tectonically-restricted basin likely from NAIP uplift. A short-lived increase in Mo, pyrite and TOC occurred during a precursor event associated with a sedimentary mercury pulse indicative of volcanic activity. We suggest thermal uplift and flood basalt volcanism tectonically restricted the North Sea and tipped it into an euxinic state via volcanic emission–oceanographic feedbacks inducing eutrophication. This fine temporal separation of tectonic versus climatic geochemical proxies, combined with pulsed NAIP volcanism, demonstrates that Large Igneous Province emplacements can, at least locally, result in ocean biogeochemical feedbacks operating on relatively short timescales. Article in Journal/Newspaper Arctic Global warming North Atlantic Norwegian Sea Natural Environment Research Council: NERC Open Research Archive Paleoceanography and Paleoclimatology 39 4 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The Paleocene–Eocene Thermal Maximum (PETM) was a global hyperthermal event ∼56 Ma characterized by massive input of carbon into the ocean–atmosphere system and global warming. A leading hypothesis for its trigger is the emplacement of the North Atlantic Igneous Province (NAIP), with extensive extrusion/intrusion of igneous material into nearby sedimentary basins, forcing local uplift and warming-inducing carbon emissions. It remains unclear if oceanographic changes in the North Sea–Norwegian Sea–Arctic basins, such as anoxia and productivity, were causally linked to local NAIP uplift/activity, and at what time scales these perturbations occurred. To test mechanisms and time scales, we present geochemical proxies (XRF analysis, clay mineralogy, molybdenum isotopes, and pyrite framboid size distribution) in undisrupted marine sediment core E−8X located in the central North Sea. We find evidence for a rapid onset of anoxia/euxinia at the negative carbon isotope excursion from redox proxies, followed by a gradual drawdown of molybdenum/total organic carbon (Mo/TOC) during the PETM main phase indicative of tectonically-restricted basin likely from NAIP uplift. A short-lived increase in Mo, pyrite and TOC occurred during a precursor event associated with a sedimentary mercury pulse indicative of volcanic activity. We suggest thermal uplift and flood basalt volcanism tectonically restricted the North Sea and tipped it into an euxinic state via volcanic emission–oceanographic feedbacks inducing eutrophication. This fine temporal separation of tectonic versus climatic geochemical proxies, combined with pulsed NAIP volcanism, demonstrates that Large Igneous Province emplacements can, at least locally, result in ocean biogeochemical feedbacks operating on relatively short timescales. |
format |
Article in Journal/Newspaper |
author |
Mariani, Erica Kender, Sev Hesselbo, Stephen P. Bogus, Kara Littler, Kate Riding, James B. Leng, Melanie J. Kemp, Simon J. Dybkjær, Karen Pedersen, Gunver K. Wagner, Thomas Dickson, Alexander J. |
spellingShingle |
Mariani, Erica Kender, Sev Hesselbo, Stephen P. Bogus, Kara Littler, Kate Riding, James B. Leng, Melanie J. Kemp, Simon J. Dybkjær, Karen Pedersen, Gunver K. Wagner, Thomas Dickson, Alexander J. Large Igneous Province Control on Ocean Anoxia and Eutrophication in the North Sea at the Paleocene–Eocene Thermal Maximum |
author_facet |
Mariani, Erica Kender, Sev Hesselbo, Stephen P. Bogus, Kara Littler, Kate Riding, James B. Leng, Melanie J. Kemp, Simon J. Dybkjær, Karen Pedersen, Gunver K. Wagner, Thomas Dickson, Alexander J. |
author_sort |
Mariani, Erica |
title |
Large Igneous Province Control on Ocean Anoxia and Eutrophication in the North Sea at the Paleocene–Eocene Thermal Maximum |
title_short |
Large Igneous Province Control on Ocean Anoxia and Eutrophication in the North Sea at the Paleocene–Eocene Thermal Maximum |
title_full |
Large Igneous Province Control on Ocean Anoxia and Eutrophication in the North Sea at the Paleocene–Eocene Thermal Maximum |
title_fullStr |
Large Igneous Province Control on Ocean Anoxia and Eutrophication in the North Sea at the Paleocene–Eocene Thermal Maximum |
title_full_unstemmed |
Large Igneous Province Control on Ocean Anoxia and Eutrophication in the North Sea at the Paleocene–Eocene Thermal Maximum |
title_sort |
large igneous province control on ocean anoxia and eutrophication in the north sea at the paleocene–eocene thermal maximum |
publisher |
American Geophysical Union |
publishDate |
2024 |
url |
http://nora.nerc.ac.uk/id/eprint/537348/ https://nora.nerc.ac.uk/id/eprint/537348/1/Paleoceanog%20and%20Paleoclimatol%20-%202024%20-%20Mariani%20-%20Large%20Igneous%20Province%20Control%20on%20Ocean%20Anoxia%20and%20Eutrophication%20in%20the.pdf https://doi.org/10.1029/2023PA004756 |
genre |
Arctic Global warming North Atlantic Norwegian Sea |
genre_facet |
Arctic Global warming North Atlantic Norwegian Sea |
op_relation |
https://nora.nerc.ac.uk/id/eprint/537348/1/Paleoceanog%20and%20Paleoclimatol%20-%202024%20-%20Mariani%20-%20Large%20Igneous%20Province%20Control%20on%20Ocean%20Anoxia%20and%20Eutrophication%20in%20the.pdf Mariani, Erica; Kender, Sev; Hesselbo, Stephen P.; Bogus, Kara; Littler, Kate; Riding, James B. orcid:0000-0002-5529-8989 Leng, Melanie J. orcid:0000-0003-1115-5166 Kemp, Simon J. orcid:0000-0002-4604-0927 Dybkjær, Karen; Pedersen, Gunver K.; Wagner, Thomas; Dickson, Alexander J. 2024 Large Igneous Province Control on Ocean Anoxia and Eutrophication in the North Sea at the Paleocene–Eocene Thermal Maximum. Paleoceanography and Paleoclimatology, 39 (4), e2023PA004756. https://doi.org/10.1029/2023PA004756 <https://doi.org/10.1029/2023PA004756> |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1029/2023PA004756 |
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Paleoceanography and Paleoclimatology |
container_volume |
39 |
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4 |
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1799475813366628352 |