Rapid light carbon releases and increased aridity linked to Karoo-Ferrar magmatism during the early Toarcian oceanic anoxic event
International audience Large-scale release of isotopically light carbon is responsible for the carbon isotope excursion (CIE) of the Toarcian Oceanic Anoxic Event during the Lower Jurassic. Proposed sources include methane hydrate dissociation, volcanogenic outgassing of carbon dioxide and/or thermo...
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Online Access: | https://insu.hal.science/insu-03691309 https://insu.hal.science/insu-03691309/document https://insu.hal.science/insu-03691309/file/s41598-022-08269-y.pdf https://doi.org/10.1038/s41598-022-08269-y |
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ftunivstetienne:oai:HAL:insu-03691309v1 2024-06-23T07:54:37+00:00 Rapid light carbon releases and increased aridity linked to Karoo-Ferrar magmatism during the early Toarcian oceanic anoxic event Font, Eric Duarte, Luís Vítor Dekkers, Mark J. Remazeilles, Celine Egli, Ramon Spangenberg, Jorge E. Fantasia, Alicia Ribeiro, Joana Gomes, Elsa Mirão, José Adatte, Thierry Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356 (LaSIE) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) 2022 https://insu.hal.science/insu-03691309 https://insu.hal.science/insu-03691309/document https://insu.hal.science/insu-03691309/file/s41598-022-08269-y.pdf https://doi.org/10.1038/s41598-022-08269-y en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-022-08269-y insu-03691309 https://insu.hal.science/insu-03691309 https://insu.hal.science/insu-03691309/document https://insu.hal.science/insu-03691309/file/s41598-022-08269-y.pdf BIBCODE: 2022NatSR.12.4342F doi:10.1038/s41598-022-08269-y PUBMEDCENTRAL: PMC8921222 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://insu.hal.science/insu-03691309 Scientific Reports, 2022, 12, ⟨10.1038/s41598-022-08269-y⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftunivstetienne https://doi.org/10.1038/s41598-022-08269-y 2024-06-10T23:58:50Z International audience Large-scale release of isotopically light carbon is responsible for the carbon isotope excursion (CIE) of the Toarcian Oceanic Anoxic Event during the Lower Jurassic. Proposed sources include methane hydrate dissociation, volcanogenic outgassing of carbon dioxide and/or thermogenic methane release from the Karoo-Ferrar magmatic province (southern Africa). Distinct small-scale shifts superimposed on the long-term CIE have been interpreted as rapid methane pulses linked to astronomically forced climate changes. In the Peniche reference section (Portugal), these small-scale shifts correspond to distinct brownish marly layers featuring markedly high mercury (Hg) and magnetic mineral concentration. Total organic carbon and Hg increase are uncorrelated, which suggests input of Hg into the atmosphere, possibly released after the intrusion of the Karoo-Ferrar sills into organic-rich sediments. Enhanced magnetic properties are associated with the presence of martite, washed-in oxidized magnetite, inferred to be due to increased aridity on the continental hinterland. This study provides strong evidence for a direct link between the Karoo-Ferrar magmatism, the carbon-isotope shifts and the resulting environmental changes. Article in Journal/Newspaper Methane hydrate Université Jean Monnet – Saint-Etienne: HAL Scientific Reports 12 1 |
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Open Polar |
collection |
Université Jean Monnet – Saint-Etienne: HAL |
op_collection_id |
ftunivstetienne |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Font, Eric Duarte, Luís Vítor Dekkers, Mark J. Remazeilles, Celine Egli, Ramon Spangenberg, Jorge E. Fantasia, Alicia Ribeiro, Joana Gomes, Elsa Mirão, José Adatte, Thierry Rapid light carbon releases and increased aridity linked to Karoo-Ferrar magmatism during the early Toarcian oceanic anoxic event |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Large-scale release of isotopically light carbon is responsible for the carbon isotope excursion (CIE) of the Toarcian Oceanic Anoxic Event during the Lower Jurassic. Proposed sources include methane hydrate dissociation, volcanogenic outgassing of carbon dioxide and/or thermogenic methane release from the Karoo-Ferrar magmatic province (southern Africa). Distinct small-scale shifts superimposed on the long-term CIE have been interpreted as rapid methane pulses linked to astronomically forced climate changes. In the Peniche reference section (Portugal), these small-scale shifts correspond to distinct brownish marly layers featuring markedly high mercury (Hg) and magnetic mineral concentration. Total organic carbon and Hg increase are uncorrelated, which suggests input of Hg into the atmosphere, possibly released after the intrusion of the Karoo-Ferrar sills into organic-rich sediments. Enhanced magnetic properties are associated with the presence of martite, washed-in oxidized magnetite, inferred to be due to increased aridity on the continental hinterland. This study provides strong evidence for a direct link between the Karoo-Ferrar magmatism, the carbon-isotope shifts and the resulting environmental changes. |
author2 |
Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356 (LaSIE) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE) École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Font, Eric Duarte, Luís Vítor Dekkers, Mark J. Remazeilles, Celine Egli, Ramon Spangenberg, Jorge E. Fantasia, Alicia Ribeiro, Joana Gomes, Elsa Mirão, José Adatte, Thierry |
author_facet |
Font, Eric Duarte, Luís Vítor Dekkers, Mark J. Remazeilles, Celine Egli, Ramon Spangenberg, Jorge E. Fantasia, Alicia Ribeiro, Joana Gomes, Elsa Mirão, José Adatte, Thierry |
author_sort |
Font, Eric |
title |
Rapid light carbon releases and increased aridity linked to Karoo-Ferrar magmatism during the early Toarcian oceanic anoxic event |
title_short |
Rapid light carbon releases and increased aridity linked to Karoo-Ferrar magmatism during the early Toarcian oceanic anoxic event |
title_full |
Rapid light carbon releases and increased aridity linked to Karoo-Ferrar magmatism during the early Toarcian oceanic anoxic event |
title_fullStr |
Rapid light carbon releases and increased aridity linked to Karoo-Ferrar magmatism during the early Toarcian oceanic anoxic event |
title_full_unstemmed |
Rapid light carbon releases and increased aridity linked to Karoo-Ferrar magmatism during the early Toarcian oceanic anoxic event |
title_sort |
rapid light carbon releases and increased aridity linked to karoo-ferrar magmatism during the early toarcian oceanic anoxic event |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03691309 https://insu.hal.science/insu-03691309/document https://insu.hal.science/insu-03691309/file/s41598-022-08269-y.pdf https://doi.org/10.1038/s41598-022-08269-y |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://insu.hal.science/insu-03691309 Scientific Reports, 2022, 12, ⟨10.1038/s41598-022-08269-y⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-022-08269-y insu-03691309 https://insu.hal.science/insu-03691309 https://insu.hal.science/insu-03691309/document https://insu.hal.science/insu-03691309/file/s41598-022-08269-y.pdf BIBCODE: 2022NatSR.12.4342F doi:10.1038/s41598-022-08269-y PUBMEDCENTRAL: PMC8921222 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41598-022-08269-y |
container_title |
Scientific Reports |
container_volume |
12 |
container_issue |
1 |
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1802646829189300224 |