Silicon isotopes in Antarctic sponges: an interlaboratory comparison
Cycling of deepwater silicon (Si) within the Southern Ocean, and its transport into other ocean basins, may be an important player in the uptake of atmospheric carbon, and global climate. Recent work has shown that the Si isotope (denoted by δ29Si or δ30Si) composition of deep sea sponges reflects t...
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Cambridge University Press
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:7519 2023-05-15T13:46:03+02:00 Silicon isotopes in Antarctic sponges: an interlaboratory comparison Hendry, Katharine Rosemary Leng, Melanie J. Robinson, Laura F. Sloane, Hilary J. Blusztjan, Jerzy Rickaby, Rosalind E. M. Georg, R. Bastian Halliday, Alex N. 2011-01 application/pdf https://orca.cardiff.ac.uk/id/eprint/7519/ https://doi.org/10.1017/S0954102010000593 https://orca.cardiff.ac.uk/id/eprint/7519/1/Hendry%202011.pdf en eng Cambridge University Press https://orca.cardiff.ac.uk/id/eprint/7519/1/Hendry%202011.pdf Hendry, Katharine Rosemary, Leng, Melanie J., Robinson, Laura F., Sloane, Hilary J., Blusztjan, Jerzy, Rickaby, Rosalind E. M., Georg, R. Bastian and Halliday, Alex N. 2011. Silicon isotopes in Antarctic sponges: an interlaboratory comparison. Antarctic Science 23 (1) , pp. 34-42. 10.1017/S0954102010000593 https://doi.org/10.1017/S0954102010000593 file https://orca.cardiff.ac.uk/7519/1/Hendry%202011.pdf doi:10.1017/S0954102010000593 Article PeerReviewed 2011 ftunivcardiff https://doi.org/10.1017/S0954102010000593 2022-09-25T20:16:07Z Cycling of deepwater silicon (Si) within the Southern Ocean, and its transport into other ocean basins, may be an important player in the uptake of atmospheric carbon, and global climate. Recent work has shown that the Si isotope (denoted by δ29Si or δ30Si) composition of deep sea sponges reflects the availability of dissolved Si during growth, and is a potential proxy for past deep and intermediate water silicic acid concentrations. As with any geochemical tool, it is essential to ensure analytical precision and accuracy, and consistency between methodologies and laboratories. Analytical bias may exist between laboratories, and sponge material may have matrix effects leading to offsets between samples and standards. Here, we report an interlaboratory evaluation of Si isotopes in Antarctic and sub-Antarctic sponges. We review independent methods for measuring Si isotopes in sponge spicules. Our results show that separate subsamples of non-homogenized sponges measured by three methods yield isotopic values within analytical error for over 80% of specimens. The relationship between δ29Si and δ30Si in sponges is consistent with kinetic fractionation during biomineralization. Sponge Si isotope analyses show potential as palaeoceaongraphic archives, and we suggest Southern Ocean sponge material would form a useful additional reference standard for future spicule analyses. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Southern Ocean Cardiff University: ORCA (Online Research @ Cardiff) Antarctic Southern Ocean Antarctic Science 23 1 34 42 |
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Open Polar |
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Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
English |
description |
Cycling of deepwater silicon (Si) within the Southern Ocean, and its transport into other ocean basins, may be an important player in the uptake of atmospheric carbon, and global climate. Recent work has shown that the Si isotope (denoted by δ29Si or δ30Si) composition of deep sea sponges reflects the availability of dissolved Si during growth, and is a potential proxy for past deep and intermediate water silicic acid concentrations. As with any geochemical tool, it is essential to ensure analytical precision and accuracy, and consistency between methodologies and laboratories. Analytical bias may exist between laboratories, and sponge material may have matrix effects leading to offsets between samples and standards. Here, we report an interlaboratory evaluation of Si isotopes in Antarctic and sub-Antarctic sponges. We review independent methods for measuring Si isotopes in sponge spicules. Our results show that separate subsamples of non-homogenized sponges measured by three methods yield isotopic values within analytical error for over 80% of specimens. The relationship between δ29Si and δ30Si in sponges is consistent with kinetic fractionation during biomineralization. Sponge Si isotope analyses show potential as palaeoceaongraphic archives, and we suggest Southern Ocean sponge material would form a useful additional reference standard for future spicule analyses. |
format |
Article in Journal/Newspaper |
author |
Hendry, Katharine Rosemary Leng, Melanie J. Robinson, Laura F. Sloane, Hilary J. Blusztjan, Jerzy Rickaby, Rosalind E. M. Georg, R. Bastian Halliday, Alex N. |
spellingShingle |
Hendry, Katharine Rosemary Leng, Melanie J. Robinson, Laura F. Sloane, Hilary J. Blusztjan, Jerzy Rickaby, Rosalind E. M. Georg, R. Bastian Halliday, Alex N. Silicon isotopes in Antarctic sponges: an interlaboratory comparison |
author_facet |
Hendry, Katharine Rosemary Leng, Melanie J. Robinson, Laura F. Sloane, Hilary J. Blusztjan, Jerzy Rickaby, Rosalind E. M. Georg, R. Bastian Halliday, Alex N. |
author_sort |
Hendry, Katharine Rosemary |
title |
Silicon isotopes in Antarctic sponges: an interlaboratory comparison |
title_short |
Silicon isotopes in Antarctic sponges: an interlaboratory comparison |
title_full |
Silicon isotopes in Antarctic sponges: an interlaboratory comparison |
title_fullStr |
Silicon isotopes in Antarctic sponges: an interlaboratory comparison |
title_full_unstemmed |
Silicon isotopes in Antarctic sponges: an interlaboratory comparison |
title_sort |
silicon isotopes in antarctic sponges: an interlaboratory comparison |
publisher |
Cambridge University Press |
publishDate |
2011 |
url |
https://orca.cardiff.ac.uk/id/eprint/7519/ https://doi.org/10.1017/S0954102010000593 https://orca.cardiff.ac.uk/id/eprint/7519/1/Hendry%202011.pdf |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Science Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Science Southern Ocean |
op_relation |
https://orca.cardiff.ac.uk/id/eprint/7519/1/Hendry%202011.pdf Hendry, Katharine Rosemary, Leng, Melanie J., Robinson, Laura F., Sloane, Hilary J., Blusztjan, Jerzy, Rickaby, Rosalind E. M., Georg, R. Bastian and Halliday, Alex N. 2011. Silicon isotopes in Antarctic sponges: an interlaboratory comparison. Antarctic Science 23 (1) , pp. 34-42. 10.1017/S0954102010000593 https://doi.org/10.1017/S0954102010000593 file https://orca.cardiff.ac.uk/7519/1/Hendry%202011.pdf doi:10.1017/S0954102010000593 |
op_doi |
https://doi.org/10.1017/S0954102010000593 |
container_title |
Antarctic Science |
container_volume |
23 |
container_issue |
1 |
container_start_page |
34 |
op_container_end_page |
42 |
_version_ |
1766235417308299264 |