Silicon isotopes in Antarctic sponges: an interlaboratory comparison
Abstract 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 δ 29 Si or δ 30 Si) composition of deep sea spong...
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crcambridgeupr:10.1017/s0954102010000593 2024-03-24T08:57:12+00:00 Silicon isotopes in Antarctic sponges: an interlaboratory comparison Hendry, Katharine R. Leng, Melanie J. Robinson, Laura F. Sloane, Hilary J. Blusztjan, Jerzy Rickaby, Rosalind E.M. Georg, R. Bastian Halliday, Alex N. 2010 http://dx.doi.org/10.1017/s0954102010000593 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102010000593 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 23, issue 1, page 34-42 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2010 crcambridgeupr https://doi.org/10.1017/s0954102010000593 2024-02-26T15:35:20Z Abstract 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 δ 29 Si or δ 30 Si) 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 δ 29 Si and δ 30 Si 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 Cambridge University Press Antarctic Southern Ocean Antarctic Science 23 1 34 42 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Hendry, Katharine R. 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 |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract 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 δ 29 Si or δ 30 Si) 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 δ 29 Si and δ 30 Si 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 R. Leng, Melanie J. Robinson, Laura F. Sloane, Hilary J. Blusztjan, Jerzy Rickaby, Rosalind E.M. Georg, R. Bastian Halliday, Alex N. |
author_facet |
Hendry, Katharine R. 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 R. |
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 (CUP) |
publishDate |
2010 |
url |
http://dx.doi.org/10.1017/s0954102010000593 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102010000593 |
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_source |
Antarctic Science volume 23, issue 1, page 34-42 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
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_ |
1794406897492688896 |