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NIST RM 8301 boron isotopes in marine carbonate (simulated coral and foraminifera solutions) : inter-laboratory δ11B and trace element ratio value assignment

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Date
30/11/2020
Author
Stewart, Joseph A.
Christopher, Steven J.
Kucklick, John R.
Bordier, Louise
Chalk, Thomas B.
Dapoigny, Arnaud
Douville, Eric
Foster, Gavin L.
Gray, William R.
Greenop, Rosanna
Gutjahr, Marcus
Hemsing, Freya
Henehan, Michael J.
Holdship, Philip
Hsieh, Yu-Te
Kolevica, Ana
Lin, Yen-Po
Mawbey, Elaine M.
Rae, James W.B.
Robinson, Laura F.
Shuttleworth, Rachael
You, Chen-Feng
Zhang, Shuang
Day, Russell D.
Funder
NERC
Grant ID
NE/N011716/1
Keywords
Boron isotopes
Trace elements
Reference materials
Coral
Foraminifera
GE Environmental Sciences
DAS
SDG 14 - Life Below Water
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Abstract
The boron isotopic (δ11BSRM951) and trace element composition of marine carbonates are key proxies for understanding carbon cycling (pH) and palaeoceanographic change. However, comparability of results between laboratories requires carbonate reference materials. Here we report results of an inter‐laboratory comparison study to both assign δ11BSRM951 and trace element compositions to new marine carbonate reference materials (RM), NIST RM 8301 (Coral) and NIST RM 8301 (Foram) and to assess analytical variability among laboratories. Non‐certified reference values and expanded 95% uncertainties for δ11BSRM951 in NIST RM 8301 (Coral) (+24.17‰ ± 0.18‰) and NIST RM 8301 (Foram) (+14.51‰ ± 0.17‰) solutions were assigned by consensus approach using inter‐laboratory data. Differences reported among laboratories were considerably smaller than some previous inter‐laboratory comparisons, yet discrepancies could still lead to large differences in calculated seawater pH. Similarly, variability in reported trace element information values among laboratories (e.g., Mg/Ca ± 5%) was often greater than analytical precision (% RSD) within a single laboratory (e.g., Mg/Ca < 2%). Such differences potentially alter proxy‐reconstructed seawater temperature by more than 2 °C. These now well‐characterised solutions are useful reference materials to help the palaeoceanographic community build a comprehensive view of past ocean changes.
Citation
Stewart , J A , Christopher , S J , Kucklick , J R , Bordier , L , Chalk , T B , Dapoigny , A , Douville , E , Foster , G L , Gray , W R , Greenop , R , Gutjahr , M , Hemsing , F , Henehan , M J , Holdship , P , Hsieh , Y-T , Kolevica , A , Lin , Y-P , Mawbey , E M , Rae , J W B , Robinson , L F , Shuttleworth , R , You , C-F , Zhang , S & Day , R D 2020 , ' NIST RM 8301 boron isotopes in marine carbonate (simulated coral and foraminifera solutions) : inter-laboratory δ 11 B and trace element ratio value assignment ' , Geostandards and Geoanalytical Research , vol. Earky View . https://doi.org/10.1111/ggr.12363
Publication
Geostandards and Geoanalytical Research
Status
Peer reviewed
DOI
https://doi.org/10.1111/ggr.12363
ISSN
1639-4488
Type
Journal article
Rights
Copyright © 2020 The Authors. Geostandards and Geoanalytical Research published by John Wiley & Sons Ltd on behalf of the International Association of Geoanalysts. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Description
Boron isotopes and trace element content measurements were funded by: the French National Research Agency projects ANR CARBORIC (Grant No. ANR-13-BS06-0013-04) and ANR HAMOC (Grant No. ANR-13-BS06-0003-02) at LSCE; NERC NE/N003861/1 & NE/S001743/1 at Bristol; NERC NE/N011716/1 at the University of St Andrews.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/21147

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