Testing for ocean acidification during the Early Toarcian using δ 44/40 Ca and δ 88/86 Sr
During the Early Toarcian, volcanic gases released by the Karoo-Ferrar large igneous province are widely believed to have caused severe environmental disturbances, including ocean acidification. Here we show records of δ Ca and δ Sr through the Early Toarcian, as recorded in three groups of biogenic...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/326391 2024-01-14T10:09:34+01:00 Testing for ocean acidification during the Early Toarcian using δ 44/40 Ca and δ 88/86 Sr Li, Q McArthur, JM Thirlwall, MF Turchyn, AV Page, K Bradbury, HJ Weis, R Lowry, D 2021 application/pdf https://www.repository.cam.ac.uk/handle/1810/326391 https://doi.org/10.17863/CAM.73847 eng eng Elsevier BV http://dx.doi.org/10.1016/j.chemgeo.2021.120228 Chemical Geology https://www.repository.cam.ac.uk/handle/1810/326391 doi:10.17863/CAM.73847 Attribution-NonCommercial-NoDerivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/ Ca-isotopes Sr-isotopes Toarcian OAE Ocean acidification Article 2021 ftunivcam https://doi.org/10.17863/CAM.73847 2023-12-21T23:27:29Z During the Early Toarcian, volcanic gases released by the Karoo-Ferrar large igneous province are widely believed to have caused severe environmental disturbances, including ocean acidification. Here we show records of δ Ca and δ Sr through the Early Toarcian, as recorded in three groups of biogenic calcite: Megateuthididae belemnites, Passaloteuthididae belemnites, and brachiopods of the species Soaresirhynchia bouchardi. We evaluate the data to eliminate the influence on isotopic composition of varying temperature, calcification rate, and salinity, through the section that may mask the environmental signals. Neither δ Ca nor δ Sr show negative isotope excursions across the suggested acidification interval as would be expected had acidification occurred. A profile of δ B, re-interpreted from a published study, shows no variation through the interval. Taken together, these data provide little support for ocean acidification at this time. In our belemnites, values of δ Sr are independent of temperature or Sr/Ca. For brachiopods, too few data are available to determine whether such dependences exist. Values of δ Ca show a weak temperature control of magnitude +0.020 ± 0.004 ‰/°C (2 s.d.). In belemnites, δ Ca also correlates positively with Mg/Ca and Sr/Ca. 44/40 88/86 44/40 88/86 11 88/86 44/40 44/40 Article in Journal/Newspaper Ocean acidification Apollo - University of Cambridge Repository |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
Ca-isotopes Sr-isotopes Toarcian OAE Ocean acidification |
spellingShingle |
Ca-isotopes Sr-isotopes Toarcian OAE Ocean acidification Li, Q McArthur, JM Thirlwall, MF Turchyn, AV Page, K Bradbury, HJ Weis, R Lowry, D Testing for ocean acidification during the Early Toarcian using δ 44/40 Ca and δ 88/86 Sr |
topic_facet |
Ca-isotopes Sr-isotopes Toarcian OAE Ocean acidification |
description |
During the Early Toarcian, volcanic gases released by the Karoo-Ferrar large igneous province are widely believed to have caused severe environmental disturbances, including ocean acidification. Here we show records of δ Ca and δ Sr through the Early Toarcian, as recorded in three groups of biogenic calcite: Megateuthididae belemnites, Passaloteuthididae belemnites, and brachiopods of the species Soaresirhynchia bouchardi. We evaluate the data to eliminate the influence on isotopic composition of varying temperature, calcification rate, and salinity, through the section that may mask the environmental signals. Neither δ Ca nor δ Sr show negative isotope excursions across the suggested acidification interval as would be expected had acidification occurred. A profile of δ B, re-interpreted from a published study, shows no variation through the interval. Taken together, these data provide little support for ocean acidification at this time. In our belemnites, values of δ Sr are independent of temperature or Sr/Ca. For brachiopods, too few data are available to determine whether such dependences exist. Values of δ Ca show a weak temperature control of magnitude +0.020 ± 0.004 ‰/°C (2 s.d.). In belemnites, δ Ca also correlates positively with Mg/Ca and Sr/Ca. 44/40 88/86 44/40 88/86 11 88/86 44/40 44/40 |
format |
Article in Journal/Newspaper |
author |
Li, Q McArthur, JM Thirlwall, MF Turchyn, AV Page, K Bradbury, HJ Weis, R Lowry, D |
author_facet |
Li, Q McArthur, JM Thirlwall, MF Turchyn, AV Page, K Bradbury, HJ Weis, R Lowry, D |
author_sort |
Li, Q |
title |
Testing for ocean acidification during the Early Toarcian using δ 44/40 Ca and δ 88/86 Sr |
title_short |
Testing for ocean acidification during the Early Toarcian using δ 44/40 Ca and δ 88/86 Sr |
title_full |
Testing for ocean acidification during the Early Toarcian using δ 44/40 Ca and δ 88/86 Sr |
title_fullStr |
Testing for ocean acidification during the Early Toarcian using δ 44/40 Ca and δ 88/86 Sr |
title_full_unstemmed |
Testing for ocean acidification during the Early Toarcian using δ 44/40 Ca and δ 88/86 Sr |
title_sort |
testing for ocean acidification during the early toarcian using δ 44/40 ca and δ 88/86 sr |
publisher |
Elsevier BV |
publishDate |
2021 |
url |
https://www.repository.cam.ac.uk/handle/1810/326391 https://doi.org/10.17863/CAM.73847 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/326391 doi:10.17863/CAM.73847 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.73847 |
_version_ |
1788064104252964864 |