Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343)
Bering Sea sediments represent expetional archives, offering the potential to study past climates and biogeochemistry at a high resolution. However, abundant hydrocarbons of microbial origin, especially along the eastern Bering Sea continental margin, can hinder the applicability of palaeoceanograph...
Published in: | Geochimica et Cosmochimica Acta |
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/125917/ https://doi.org/10.1016/j.gca.2019.09.025 https://orca.cardiff.ac.uk/id/eprint/125917/13/1-s2.0-S0016703719306039-main.pdf |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:125917 2023-08-27T04:08:44+02:00 Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343) Detlef, Henrieka Sosdian, Sindia M. Kender, Sev Lear, Caroline H. Hall, Ian R. 2020-01-01 application/pdf https://orca.cardiff.ac.uk/id/eprint/125917/ https://doi.org/10.1016/j.gca.2019.09.025 https://orca.cardiff.ac.uk/id/eprint/125917/13/1-s2.0-S0016703719306039-main.pdf en eng Elsevier https://orca.cardiff.ac.uk/id/eprint/125917/13/1-s2.0-S0016703719306039-main.pdf Detlef, Henrieka, Sosdian, Sindia M. https://orca.cardiff.ac.uk/view/cardiffauthors/A185665E.html orcid:0000-0002-4599-5529 orcid:0000-0002-4599-5529, Kender, Sev, Lear, Caroline H. https://orca.cardiff.ac.uk/view/cardiffauthors/A048848V.html orcid:0000-0002-7533-4430 orcid:0000-0002-7533-4430 and Hall, Ian R. https://orca.cardiff.ac.uk/view/cardiffauthors/A002402L.html orcid:0000-0001-6960-1419 orcid:0000-0001-6960-1419 2020. Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343). Geochimica et Cosmochimica Acta 268 , pp. 1-21. 10.1016/j.gca.2019.09.025 https://doi.org/10.1016/j.gca.2019.09.025 file https://orca.cardiff.ac.uk/id/eprint/125917/13/1-s2.0-S0016703719306039-main.pdf doi:10.1016/j.gca.2019.09.025 cc_by Article PeerReviewed 2020 ftunivcardiff https://doi.org/10.1016/j.gca.2019.09.025 2023-08-10T22:35:25Z Bering Sea sediments represent expetional archives, offering the potential to study past climates and biogeochemistry at a high resolution. However, abundant hydrocarbons of microbial origin, especially along the eastern Bering Sea continental margin, can hinder the applicability of palaeoceanographic proxies based on calcareous foraminifera, due to the formation of authigenic carbonates. Nonetheless, authigenic carbonates may also bear unique opportunities to reconstruct changes in the sedimentary redox environment. Here we use a suite of visual and geochemical evidence from single-specimens of the shallow infaunal benthic foraminiferal species Elphidium batialis Saidova (1961), recovered from International Ocean Discovery Program (IODP) Site U1343 in the eastern Bering Sea, to investigate the influence of authigenic carbonates on the foraminiferal trace metal composition. Our results demonstrate that foraminiferal calcite tests act as a nucleation template for secondary carbonate precipitation, altering their geochemistry where organoclastic sulphate reduction and anaerobic oxidation of methane cause the formation of low- and high-Mg calcite, respectively. The authigenic carbonates can occur as encrusting on the outside and/or inside of foraminiferal tests, in the form of recrystallization of the test wall, or as banding along natural laminations within the foraminiferal test walls. In addition to Mg, authigenic carbonates are enriched in U/Ca, Mn/Ca, Fe/Ca, and Sr/Ca, depending on the redox environment that they were formed in. Our results demonstrate that site-specific U/Ca thresholds are a promising tool to distinguish between diagenetically altered and pristine foraminiferal samples, important for palaeoceanographic reconstructions utilising the primary foraminiferal geochemistry. Consistent with previous studies, U/Mn ratios of foraminifera at IODP Site U1343 increase according to their degree of diagenetic alteration, suggesting a potential response of authigenic U/Mn to the microbial activity in turn ... Article in Journal/Newspaper Bering Sea Cardiff University: ORCA (Online Research @ Cardiff) Bering Sea Geochimica et Cosmochimica Acta 268 1 21 |
institution |
Open Polar |
collection |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
English |
description |
Bering Sea sediments represent expetional archives, offering the potential to study past climates and biogeochemistry at a high resolution. However, abundant hydrocarbons of microbial origin, especially along the eastern Bering Sea continental margin, can hinder the applicability of palaeoceanographic proxies based on calcareous foraminifera, due to the formation of authigenic carbonates. Nonetheless, authigenic carbonates may also bear unique opportunities to reconstruct changes in the sedimentary redox environment. Here we use a suite of visual and geochemical evidence from single-specimens of the shallow infaunal benthic foraminiferal species Elphidium batialis Saidova (1961), recovered from International Ocean Discovery Program (IODP) Site U1343 in the eastern Bering Sea, to investigate the influence of authigenic carbonates on the foraminiferal trace metal composition. Our results demonstrate that foraminiferal calcite tests act as a nucleation template for secondary carbonate precipitation, altering their geochemistry where organoclastic sulphate reduction and anaerobic oxidation of methane cause the formation of low- and high-Mg calcite, respectively. The authigenic carbonates can occur as encrusting on the outside and/or inside of foraminiferal tests, in the form of recrystallization of the test wall, or as banding along natural laminations within the foraminiferal test walls. In addition to Mg, authigenic carbonates are enriched in U/Ca, Mn/Ca, Fe/Ca, and Sr/Ca, depending on the redox environment that they were formed in. Our results demonstrate that site-specific U/Ca thresholds are a promising tool to distinguish between diagenetically altered and pristine foraminiferal samples, important for palaeoceanographic reconstructions utilising the primary foraminiferal geochemistry. Consistent with previous studies, U/Mn ratios of foraminifera at IODP Site U1343 increase according to their degree of diagenetic alteration, suggesting a potential response of authigenic U/Mn to the microbial activity in turn ... |
format |
Article in Journal/Newspaper |
author |
Detlef, Henrieka Sosdian, Sindia M. Kender, Sev Lear, Caroline H. Hall, Ian R. |
spellingShingle |
Detlef, Henrieka Sosdian, Sindia M. Kender, Sev Lear, Caroline H. Hall, Ian R. Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343) |
author_facet |
Detlef, Henrieka Sosdian, Sindia M. Kender, Sev Lear, Caroline H. Hall, Ian R. |
author_sort |
Detlef, Henrieka |
title |
Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343) |
title_short |
Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343) |
title_full |
Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343) |
title_fullStr |
Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343) |
title_full_unstemmed |
Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343) |
title_sort |
multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern bering sea continental margin (international ocean discovery program site u1343) |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://orca.cardiff.ac.uk/id/eprint/125917/ https://doi.org/10.1016/j.gca.2019.09.025 https://orca.cardiff.ac.uk/id/eprint/125917/13/1-s2.0-S0016703719306039-main.pdf |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_relation |
https://orca.cardiff.ac.uk/id/eprint/125917/13/1-s2.0-S0016703719306039-main.pdf Detlef, Henrieka, Sosdian, Sindia M. https://orca.cardiff.ac.uk/view/cardiffauthors/A185665E.html orcid:0000-0002-4599-5529 orcid:0000-0002-4599-5529, Kender, Sev, Lear, Caroline H. https://orca.cardiff.ac.uk/view/cardiffauthors/A048848V.html orcid:0000-0002-7533-4430 orcid:0000-0002-7533-4430 and Hall, Ian R. https://orca.cardiff.ac.uk/view/cardiffauthors/A002402L.html orcid:0000-0001-6960-1419 orcid:0000-0001-6960-1419 2020. Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343). Geochimica et Cosmochimica Acta 268 , pp. 1-21. 10.1016/j.gca.2019.09.025 https://doi.org/10.1016/j.gca.2019.09.025 file https://orca.cardiff.ac.uk/id/eprint/125917/13/1-s2.0-S0016703719306039-main.pdf doi:10.1016/j.gca.2019.09.025 |
op_rights |
cc_by |
op_doi |
https://doi.org/10.1016/j.gca.2019.09.025 |
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