High benthic methane flux in low sulfate oceans: Evidence from carbon isotopes in Late Cretaceous Antarctic bivalves
The shell material of marine benthic bivalves provides a sensitive archive of water chemistry immediately above the sediment–water interface, which in turn is affected by sedimentary geochemistry and redox reactions. Sulfate has a major controlling effect on sedimentary carbon cycling, particularly...
Published in: | Earth and Planetary Science Letters |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/520374/ https://nora.nerc.ac.uk/id/eprint/520374/1/1-s2.0-S0012821X18303534-main.pdf https://doi.org/10.1016/j.epsl.2018.06.014 |
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ftnerc:oai:nora.nerc.ac.uk:520374 2023-05-15T13:49:35+02:00 High benthic methane flux in low sulfate oceans: Evidence from carbon isotopes in Late Cretaceous Antarctic bivalves Hall, Joanna L.O. Newton, Robert J. Witts, James D. Francis, Jane E. Hunter, Stephen J. Jamieson, Robert A. Harper, Elizabeth M. Crame, J. Alistair Haywood, Alan M. 2018-09 text http://nora.nerc.ac.uk/id/eprint/520374/ https://nora.nerc.ac.uk/id/eprint/520374/1/1-s2.0-S0012821X18303534-main.pdf https://doi.org/10.1016/j.epsl.2018.06.014 en eng Elsevier https://nora.nerc.ac.uk/id/eprint/520374/1/1-s2.0-S0012821X18303534-main.pdf Hall, Joanna L.O.; Newton, Robert J.; Witts, James D.; Francis, Jane E.; Hunter, Stephen J.; Jamieson, Robert A.; Harper, Elizabeth M.; Crame, J. Alistair orcid:0000-0002-5027-9965 Haywood, Alan M. 2018 High benthic methane flux in low sulfate oceans: Evidence from carbon isotopes in Late Cretaceous Antarctic bivalves. Earth and Planetary Science Letters, 497. 113-122. https://doi.org/10.1016/j.epsl.2018.06.014 <https://doi.org/10.1016/j.epsl.2018.06.014> cc_by_4 CC-BY Marine Sciences Chemistry Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1016/j.epsl.2018.06.014 2023-02-04T19:46:43Z The shell material of marine benthic bivalves provides a sensitive archive of water chemistry immediately above the sediment–water interface, which in turn is affected by sedimentary geochemistry and redox reactions. Sulfate has a major controlling effect on sedimentary carbon cycling, particularly the processes of methane production and oxidation, with lower concentrations of sulfate likely resulting in an increase in sedimentary methane production. Whilst it is accepted that ocean sulfate varied markedly across the Phanerozoic, evidence of changes in methane production in sediments has so far been lacking. There is potential for the oxidation products of sedimentary methane to be preserved and detected in marine fossils. Here we present the results of high resolution carbonate isotope records from two taxa of well-preserved shallow-infaunal bivalve (Lahillia and Cucullaea) collected from the marine shelf succession across the Cretaceous–Paleogene (K–Pg) boundary in Seymour Island, Antarctica. The succession has pre-existing subtle indications of more abundant methane, and the time period is characterized by much lower marine sulfate concentrations than modern. These shell carbonate–carbon isotope records vary widely: at one extreme, shells have typical average values and small ranges compatible with a contemporaneous marine dissolved inorganic carbon (DIC) source and modern-style sedimentary carbon cycling. At the other, the shells have large-amplitude annual cycles of carbon isotopic variability of up to 23.8‰ within a single year of growth and shell carbonate δ13δ13C compositions as negative as −34‰. Shells with these increased ranges and unusually negative values are found at discrete intervals and across both bivalve taxa. The contribution of methane required to explain the most negative carbonate–carbon isotopic values in the bivalve shells is extremely high (between 30 to 85% of bottom-water DIC based on mass balance calculations). Records of organic-carbon isotopes from the same succession remained ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Seymour Island Natural Environment Research Council: NERC Open Research Archive Antarctic Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Earth and Planetary Science Letters 497 113 122 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Marine Sciences Chemistry |
spellingShingle |
Marine Sciences Chemistry Hall, Joanna L.O. Newton, Robert J. Witts, James D. Francis, Jane E. Hunter, Stephen J. Jamieson, Robert A. Harper, Elizabeth M. Crame, J. Alistair Haywood, Alan M. High benthic methane flux in low sulfate oceans: Evidence from carbon isotopes in Late Cretaceous Antarctic bivalves |
topic_facet |
Marine Sciences Chemistry |
description |
The shell material of marine benthic bivalves provides a sensitive archive of water chemistry immediately above the sediment–water interface, which in turn is affected by sedimentary geochemistry and redox reactions. Sulfate has a major controlling effect on sedimentary carbon cycling, particularly the processes of methane production and oxidation, with lower concentrations of sulfate likely resulting in an increase in sedimentary methane production. Whilst it is accepted that ocean sulfate varied markedly across the Phanerozoic, evidence of changes in methane production in sediments has so far been lacking. There is potential for the oxidation products of sedimentary methane to be preserved and detected in marine fossils. Here we present the results of high resolution carbonate isotope records from two taxa of well-preserved shallow-infaunal bivalve (Lahillia and Cucullaea) collected from the marine shelf succession across the Cretaceous–Paleogene (K–Pg) boundary in Seymour Island, Antarctica. The succession has pre-existing subtle indications of more abundant methane, and the time period is characterized by much lower marine sulfate concentrations than modern. These shell carbonate–carbon isotope records vary widely: at one extreme, shells have typical average values and small ranges compatible with a contemporaneous marine dissolved inorganic carbon (DIC) source and modern-style sedimentary carbon cycling. At the other, the shells have large-amplitude annual cycles of carbon isotopic variability of up to 23.8‰ within a single year of growth and shell carbonate δ13δ13C compositions as negative as −34‰. Shells with these increased ranges and unusually negative values are found at discrete intervals and across both bivalve taxa. The contribution of methane required to explain the most negative carbonate–carbon isotopic values in the bivalve shells is extremely high (between 30 to 85% of bottom-water DIC based on mass balance calculations). Records of organic-carbon isotopes from the same succession remained ... |
format |
Article in Journal/Newspaper |
author |
Hall, Joanna L.O. Newton, Robert J. Witts, James D. Francis, Jane E. Hunter, Stephen J. Jamieson, Robert A. Harper, Elizabeth M. Crame, J. Alistair Haywood, Alan M. |
author_facet |
Hall, Joanna L.O. Newton, Robert J. Witts, James D. Francis, Jane E. Hunter, Stephen J. Jamieson, Robert A. Harper, Elizabeth M. Crame, J. Alistair Haywood, Alan M. |
author_sort |
Hall, Joanna L.O. |
title |
High benthic methane flux in low sulfate oceans: Evidence from carbon isotopes in Late Cretaceous Antarctic bivalves |
title_short |
High benthic methane flux in low sulfate oceans: Evidence from carbon isotopes in Late Cretaceous Antarctic bivalves |
title_full |
High benthic methane flux in low sulfate oceans: Evidence from carbon isotopes in Late Cretaceous Antarctic bivalves |
title_fullStr |
High benthic methane flux in low sulfate oceans: Evidence from carbon isotopes in Late Cretaceous Antarctic bivalves |
title_full_unstemmed |
High benthic methane flux in low sulfate oceans: Evidence from carbon isotopes in Late Cretaceous Antarctic bivalves |
title_sort |
high benthic methane flux in low sulfate oceans: evidence from carbon isotopes in late cretaceous antarctic bivalves |
publisher |
Elsevier |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/520374/ https://nora.nerc.ac.uk/id/eprint/520374/1/1-s2.0-S0012821X18303534-main.pdf https://doi.org/10.1016/j.epsl.2018.06.014 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Seymour Seymour Island |
geographic_facet |
Antarctic Seymour Seymour Island |
genre |
Antarc* Antarctic Antarctica Seymour Island |
genre_facet |
Antarc* Antarctic Antarctica Seymour Island |
op_relation |
https://nora.nerc.ac.uk/id/eprint/520374/1/1-s2.0-S0012821X18303534-main.pdf Hall, Joanna L.O.; Newton, Robert J.; Witts, James D.; Francis, Jane E.; Hunter, Stephen J.; Jamieson, Robert A.; Harper, Elizabeth M.; Crame, J. Alistair orcid:0000-0002-5027-9965 Haywood, Alan M. 2018 High benthic methane flux in low sulfate oceans: Evidence from carbon isotopes in Late Cretaceous Antarctic bivalves. Earth and Planetary Science Letters, 497. 113-122. https://doi.org/10.1016/j.epsl.2018.06.014 <https://doi.org/10.1016/j.epsl.2018.06.014> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.epsl.2018.06.014 |
container_title |
Earth and Planetary Science Letters |
container_volume |
497 |
container_start_page |
113 |
op_container_end_page |
122 |
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1766251787712462848 |