Constraining oceanic carbonate chemistry evolution during the Cretaceous-Paleogene transition: Combined benthic and planktonic calcium isotope records from the equatorial Pacific Ocean
International audience The Mesozoic-Cenozoic transition is a period of biogeochemical cycle perturbations. The strongest of them is the Cretaceous-Paleogene boundary (K-Pg) crisis, characterized by one of the most important extinctions of planktonic marine calcifiers in Earth's history. One of...
Published in: | Earth and Planetary Science Letters |
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ftinsu:oai:HAL:insu-04198247v1 2024-02-11T10:07:38+01:00 Constraining oceanic carbonate chemistry evolution during the Cretaceous-Paleogene transition: Combined benthic and planktonic calcium isotope records from the equatorial Pacific Ocean Jouini, Arbia Paris, Guillaume Caro, Guillaume Bartolini, Annachiara Gardin, Sivia Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Centre de Recherche en Paléontologie - Paris (CR2P) Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2023 https://insu.hal.science/insu-04198247 https://doi.org/10.1016/j.epsl.2023.118305 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2023.118305 insu-04198247 https://insu.hal.science/insu-04198247 BIBCODE: 2023E&PSL.61918305J doi:10.1016/j.epsl.2023.118305 ISSN: 0012-821X Earth and Planetary Science Letters https://insu.hal.science/insu-04198247 Earth and Planetary Science Letters, 2023, 619, pp.118305. ⟨10.1016/j.epsl.2023.118305⟩ calcium isotopes K-Pg transition planktonic and benthic foraminifera Deccan Earth Science [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftinsu https://doi.org/10.1016/j.epsl.2023.118305 2024-01-24T17:26:12Z International audience The Mesozoic-Cenozoic transition is a period of biogeochemical cycle perturbations. The strongest of them is the Cretaceous-Paleogene boundary (K-Pg) crisis, characterized by one of the most important extinctions of planktonic marine calcifiers in Earth's history. One of the primary drivers of this biocalcification crisis is thought to be the increase in atmospheric CO 2 concentration and ocean acidification triggered by the Chicxulub Impact, and/or Deccan volcanism. Because it reflects changes of the calcium cycle and/or depends on parameters of the carbonate system, the Ca isotope composition of carbonate minerals precipitated from seawater ( δ 44 / 40 Ca) offers the potential to reconstruct some of the environmental changes that occurred. Here we present new high-resolution planktonic and benthic foraminiferal δ 44 / 40 Ca, δ 18 O, δ 13 C, and Sr/Ca records across the K-Pg transition from Shatsky rise (Leg 198; ODP Site 1209, Hole C). The δ 44 / 40 Ca record displays a succession of rapid shifts of ca. - 0.4 ‰ across the K-Pg transition. They are similar though not identical between the planktonic and benthic records. These shifts took place on a timescale significantly shorter than the residence time of Ca in the oceans and are therefore unlikely to result from global disequilibrium in the oceanic Ca budget. Instead, changes in the fractionation factor between carbonate minerals and seawater in response to changes in precipitation rates may explain the observed δ 44 / 40 Ca and Sr/Ca record. The benthic and planktonic δ 44 / 40 Ca records show a late Maastrichtian and an early Danian negative excursions best explained by a succession of episodes of ocean alkalinity increase related to increased continental weathering caused by CO 2 emissions from Deccan volcanism and the aftermath of the K-Pg biocalcification crisis. Carbonate compensation via carbonate sediment dissolution, biological carbonate compensation via reduction of biocalcification, and/or an increase in continental ... Article in Journal/Newspaper Ocean acidification Institut national des sciences de l'Univers: HAL-INSU Pacific Earth and Planetary Science Letters 619 118305 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
calcium isotopes K-Pg transition planktonic and benthic foraminifera Deccan Earth Science [SDU]Sciences of the Universe [physics] |
spellingShingle |
calcium isotopes K-Pg transition planktonic and benthic foraminifera Deccan Earth Science [SDU]Sciences of the Universe [physics] Jouini, Arbia Paris, Guillaume Caro, Guillaume Bartolini, Annachiara Gardin, Sivia Constraining oceanic carbonate chemistry evolution during the Cretaceous-Paleogene transition: Combined benthic and planktonic calcium isotope records from the equatorial Pacific Ocean |
topic_facet |
calcium isotopes K-Pg transition planktonic and benthic foraminifera Deccan Earth Science [SDU]Sciences of the Universe [physics] |
description |
International audience The Mesozoic-Cenozoic transition is a period of biogeochemical cycle perturbations. The strongest of them is the Cretaceous-Paleogene boundary (K-Pg) crisis, characterized by one of the most important extinctions of planktonic marine calcifiers in Earth's history. One of the primary drivers of this biocalcification crisis is thought to be the increase in atmospheric CO 2 concentration and ocean acidification triggered by the Chicxulub Impact, and/or Deccan volcanism. Because it reflects changes of the calcium cycle and/or depends on parameters of the carbonate system, the Ca isotope composition of carbonate minerals precipitated from seawater ( δ 44 / 40 Ca) offers the potential to reconstruct some of the environmental changes that occurred. Here we present new high-resolution planktonic and benthic foraminiferal δ 44 / 40 Ca, δ 18 O, δ 13 C, and Sr/Ca records across the K-Pg transition from Shatsky rise (Leg 198; ODP Site 1209, Hole C). The δ 44 / 40 Ca record displays a succession of rapid shifts of ca. - 0.4 ‰ across the K-Pg transition. They are similar though not identical between the planktonic and benthic records. These shifts took place on a timescale significantly shorter than the residence time of Ca in the oceans and are therefore unlikely to result from global disequilibrium in the oceanic Ca budget. Instead, changes in the fractionation factor between carbonate minerals and seawater in response to changes in precipitation rates may explain the observed δ 44 / 40 Ca and Sr/Ca record. The benthic and planktonic δ 44 / 40 Ca records show a late Maastrichtian and an early Danian negative excursions best explained by a succession of episodes of ocean alkalinity increase related to increased continental weathering caused by CO 2 emissions from Deccan volcanism and the aftermath of the K-Pg biocalcification crisis. Carbonate compensation via carbonate sediment dissolution, biological carbonate compensation via reduction of biocalcification, and/or an increase in continental ... |
author2 |
Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Centre de Recherche en Paléontologie - Paris (CR2P) Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Jouini, Arbia Paris, Guillaume Caro, Guillaume Bartolini, Annachiara Gardin, Sivia |
author_facet |
Jouini, Arbia Paris, Guillaume Caro, Guillaume Bartolini, Annachiara Gardin, Sivia |
author_sort |
Jouini, Arbia |
title |
Constraining oceanic carbonate chemistry evolution during the Cretaceous-Paleogene transition: Combined benthic and planktonic calcium isotope records from the equatorial Pacific Ocean |
title_short |
Constraining oceanic carbonate chemistry evolution during the Cretaceous-Paleogene transition: Combined benthic and planktonic calcium isotope records from the equatorial Pacific Ocean |
title_full |
Constraining oceanic carbonate chemistry evolution during the Cretaceous-Paleogene transition: Combined benthic and planktonic calcium isotope records from the equatorial Pacific Ocean |
title_fullStr |
Constraining oceanic carbonate chemistry evolution during the Cretaceous-Paleogene transition: Combined benthic and planktonic calcium isotope records from the equatorial Pacific Ocean |
title_full_unstemmed |
Constraining oceanic carbonate chemistry evolution during the Cretaceous-Paleogene transition: Combined benthic and planktonic calcium isotope records from the equatorial Pacific Ocean |
title_sort |
constraining oceanic carbonate chemistry evolution during the cretaceous-paleogene transition: combined benthic and planktonic calcium isotope records from the equatorial pacific ocean |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://insu.hal.science/insu-04198247 https://doi.org/10.1016/j.epsl.2023.118305 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://insu.hal.science/insu-04198247 Earth and Planetary Science Letters, 2023, 619, pp.118305. ⟨10.1016/j.epsl.2023.118305⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2023.118305 insu-04198247 https://insu.hal.science/insu-04198247 BIBCODE: 2023E&PSL.61918305J doi:10.1016/j.epsl.2023.118305 |
op_doi |
https://doi.org/10.1016/j.epsl.2023.118305 |
container_title |
Earth and Planetary Science Letters |
container_volume |
619 |
container_start_page |
118305 |
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1790606285716062208 |