Testing for ocean acidification during the Early Toarcian using δ44/40Ca and δ88/86Sr
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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ftucl:oai:eprints.ucl.ac.uk.OAI2:10129052 2023-12-24T10:23:46+01:00 Testing for ocean acidification during the Early Toarcian using δ44/40Ca and δ88/86Sr Li, Q McArthur, JM Thirlwall, MF Turchyn, AV Page, K Bradbury, HJ Weis, R Lowry, D 2021-07-20 text https://discovery.ucl.ac.uk/id/eprint/10129052/1/CHEMGE13580_Accepted.pdf https://discovery.ucl.ac.uk/id/eprint/10129052/ eng eng https://discovery.ucl.ac.uk/id/eprint/10129052/1/CHEMGE13580_Accepted.pdf https://discovery.ucl.ac.uk/id/eprint/10129052/ open Chemical Geology , 574 , Article 120228. (2021) Ca-isotopes Sr-isotopes Toarcian OAE Ocean acidification Article 2021 ftucl 2023-11-27T13:07:27Z 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 University College London: UCL Discovery |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
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 δ44/40Ca and δ88/86Sr |
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 δ44/40Ca and δ88/86Sr |
title_short |
Testing for ocean acidification during the Early Toarcian using δ44/40Ca and δ88/86Sr |
title_full |
Testing for ocean acidification during the Early Toarcian using δ44/40Ca and δ88/86Sr |
title_fullStr |
Testing for ocean acidification during the Early Toarcian using δ44/40Ca and δ88/86Sr |
title_full_unstemmed |
Testing for ocean acidification during the Early Toarcian using δ44/40Ca and δ88/86Sr |
title_sort |
testing for ocean acidification during the early toarcian using δ44/40ca and δ88/86sr |
publishDate |
2021 |
url |
https://discovery.ucl.ac.uk/id/eprint/10129052/1/CHEMGE13580_Accepted.pdf https://discovery.ucl.ac.uk/id/eprint/10129052/ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Chemical Geology , 574 , Article 120228. (2021) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10129052/1/CHEMGE13580_Accepted.pdf https://discovery.ucl.ac.uk/id/eprint/10129052/ |
op_rights |
open |
_version_ |
1786197988538843136 |