Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides
The variability in Mg/Ca and Sr/Ca within individual tests and chambers of tests, and samples consisting of differing numbers of individuals, was determined for Globigerina bulloides and Globorotalia truncatulinoides in a North Atlantic core top sample (52.918°N 16.917°W'). The variability in M...
Published in: | Geochemistry, Geophysics, Geosystems |
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2005
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ftvuamstcris:oai:research.vu.nl:publications/4aeac51e-4f23-480c-874b-1800968278b5 2023-05-15T17:34:25+02:00 Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides Anand-Jha, P. Elderfield, H. 2005 https://research.vu.nl/en/publications/4aeac51e-4f23-480c-874b-1800968278b5 https://doi.org/10.1029/2004GC000811 http://hdl.handle.net/1871.1/4aeac51e-4f23-480c-874b-1800968278b5 eng eng info:eu-repo/semantics/restrictedAccess Anand-Jha , P & Elderfield , H 2005 , ' Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides ' , Geochemistry, Geophysics, Geosystems , vol. 6 , no. Q11D15 . https://doi.org/10.1029/2004GC000811 article 2005 ftvuamstcris https://doi.org/10.1029/2004GC000811 2022-01-17T13:18:07Z The variability in Mg/Ca and Sr/Ca within individual tests and chambers of tests, and samples consisting of differing numbers of individuals, was determined for Globigerina bulloides and Globorotalia truncatulinoides in a North Atlantic core top sample (52.918°N 16.917°W'). The variability in Mg/Ca and Sr/Ca within individual tests and chambers was determined by electron microprobe, and samples consisting of variable sample size were measured using inductively coupled plasma optical emission spectrometer (ICP-OES). Large compositional heterogeneity was found within individual chambers, and within the test as a whole, of the two species and the presence of regions with up to ∼10 mmol/mol Mg/Ca, especially in G. bulloides. Mean Mg/Ca decreases in successive chambers of G. bulloides (especially the 300-355 μm fraction) and is accompanied by decreasing variance but is not statistical significant. Sr/Ca is much more homogeneously distributed, with a normal distribution, and shows no differences from chamber to chamber. The variability of Mg/Ca and Sr/Ca decreases with increasing sample size, from single to five to twenty tests per sample, approximately as for a normal distribution, with greater variability for G. bulloides than for G. truncatulinoides, equivalent to uncertainties in temperature (n = 20) of 1.1 °C and 0.7°C for the two species within the whole of the sediment mixed layer. Copyright 2005 by the American Geophysical Union. Article in Journal/Newspaper North Atlantic Vrije Universiteit Amsterdam (VU): Research Portal Geochemistry, Geophysics, Geosystems 6 11 n/a n/a |
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Open Polar |
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Vrije Universiteit Amsterdam (VU): Research Portal |
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ftvuamstcris |
language |
English |
description |
The variability in Mg/Ca and Sr/Ca within individual tests and chambers of tests, and samples consisting of differing numbers of individuals, was determined for Globigerina bulloides and Globorotalia truncatulinoides in a North Atlantic core top sample (52.918°N 16.917°W'). The variability in Mg/Ca and Sr/Ca within individual tests and chambers was determined by electron microprobe, and samples consisting of variable sample size were measured using inductively coupled plasma optical emission spectrometer (ICP-OES). Large compositional heterogeneity was found within individual chambers, and within the test as a whole, of the two species and the presence of regions with up to ∼10 mmol/mol Mg/Ca, especially in G. bulloides. Mean Mg/Ca decreases in successive chambers of G. bulloides (especially the 300-355 μm fraction) and is accompanied by decreasing variance but is not statistical significant. Sr/Ca is much more homogeneously distributed, with a normal distribution, and shows no differences from chamber to chamber. The variability of Mg/Ca and Sr/Ca decreases with increasing sample size, from single to five to twenty tests per sample, approximately as for a normal distribution, with greater variability for G. bulloides than for G. truncatulinoides, equivalent to uncertainties in temperature (n = 20) of 1.1 °C and 0.7°C for the two species within the whole of the sediment mixed layer. Copyright 2005 by the American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
Anand-Jha, P. Elderfield, H. |
spellingShingle |
Anand-Jha, P. Elderfield, H. Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
author_facet |
Anand-Jha, P. Elderfield, H. |
author_sort |
Anand-Jha, P. |
title |
Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
title_short |
Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
title_full |
Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
title_fullStr |
Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
title_full_unstemmed |
Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides |
title_sort |
variability of mg/ca and sr/ca between and within the planktonic foraminifers globigerina bulloides and globorotalia truncatulinoides |
publishDate |
2005 |
url |
https://research.vu.nl/en/publications/4aeac51e-4f23-480c-874b-1800968278b5 https://doi.org/10.1029/2004GC000811 http://hdl.handle.net/1871.1/4aeac51e-4f23-480c-874b-1800968278b5 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Anand-Jha , P & Elderfield , H 2005 , ' Variability of Mg/Ca and Sr/Ca between and within the planktonic foraminifers Globigerina bulloides and Globorotalia truncatulinoides ' , Geochemistry, Geophysics, Geosystems , vol. 6 , no. Q11D15 . https://doi.org/10.1029/2004GC000811 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/2004GC000811 |
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Geochemistry, Geophysics, Geosystems |
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6 |
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11 |
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