Record of methane emissions from the West Svalbard continental margin during the last 23.500 yrs revealed by delta C-13 of benthic foraminifera
The values of delta C-13 in benthic foraminifera have been measured in a gas-hydrate-bearing sediment core collected from an area of active methane venting on the Vestnesa Ridge (West Svalbard continental margin) to reconstruct the local history of methane emissions over the past 23.500 yrs BP. The...
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Elsevier Science Bv
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Online Access: | https://archimer.ifremer.fr/doc/00245/35605/88200.pdf https://doi.org/10.1016/j.gloplacha.2014.08.014 https://archimer.ifremer.fr/doc/00245/35605/ |
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ftarchimer:oai:archimer.ifremer.fr:35605 2023-05-15T16:30:02+02:00 Record of methane emissions from the West Svalbard continental margin during the last 23.500 yrs revealed by delta C-13 of benthic foraminifera Panieri, Giuliana James, Rachael H. Camerlenghi, Angelo Westbrook, Graham Consolaro, Chiara Cacho, Isabel Cesari, Valentina Sanchez Cervera, Cristina 2014-11 application/pdf https://archimer.ifremer.fr/doc/00245/35605/88200.pdf https://doi.org/10.1016/j.gloplacha.2014.08.014 https://archimer.ifremer.fr/doc/00245/35605/ eng eng Elsevier Science Bv https://archimer.ifremer.fr/doc/00245/35605/88200.pdf doi:10.1016/j.gloplacha.2014.08.014 https://archimer.ifremer.fr/doc/00245/35605/ 2014 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use Global And Planetary Change (0921-8181) (Elsevier Science Bv), 2014-11 , Vol. 122 , P. 151-160 Methane emission Vestnesa Ridge West Svalbard Stable isotope delta C-13 Benthic foraminifera text Publication info:eu-repo/semantics/article 2014 ftarchimer https://doi.org/10.1016/j.gloplacha.2014.08.014 2021-09-23T20:25:36Z The values of delta C-13 in benthic foraminifera have been measured in a gas-hydrate-bearing sediment core collected from an area of active methane venting on the Vestnesa Ridge (West Svalbard continental margin) to reconstruct the local history of methane emissions over the past 23.500 yrs BP. The chronostratigraphic framework of the core has been derived from AMS C-14 dates and biostratigraphic analysis. While foraminifera from some intervals have delta C-13 within the normal marine range (0 to-1%.), five intervals are characterized by a much lower delta C-13, as low as -17.4%. These intervals are interpreted to record the incorporation of C-13-depleted carbon in the presence of methane emissions at the seafloor during biomineralization of the carbonate foraminiferal tests and subsequent secondary mineralization. Methane emission events (MEE) occur from the Last Glacial Maximum (LGM) to the Holocene, with the most prominent one, in terms of delta C-13 depletion, predating the Bolling-Allerod Interstadial (GI-1 in the Greenland ice core record). The lack of correlation between the values of delta C-13 and delta O-18, however, appears to preclude warming of bottom waters as the principal control on methane release. Rather, it seems likely that methane release is a consequence of episodicity in the supply of gas to the hydrate system and in the processes that enable methane gas to migrate through the hydrate stability field to the seabed, or of other geological processes still under debate. Article in Journal/Newspaper Greenland Greenland ice core ice core Svalbard Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Greenland Svalbard Global and Planetary Change 122 151 160 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Methane emission Vestnesa Ridge West Svalbard Stable isotope delta C-13 Benthic foraminifera |
spellingShingle |
Methane emission Vestnesa Ridge West Svalbard Stable isotope delta C-13 Benthic foraminifera Panieri, Giuliana James, Rachael H. Camerlenghi, Angelo Westbrook, Graham Consolaro, Chiara Cacho, Isabel Cesari, Valentina Sanchez Cervera, Cristina Record of methane emissions from the West Svalbard continental margin during the last 23.500 yrs revealed by delta C-13 of benthic foraminifera |
topic_facet |
Methane emission Vestnesa Ridge West Svalbard Stable isotope delta C-13 Benthic foraminifera |
description |
The values of delta C-13 in benthic foraminifera have been measured in a gas-hydrate-bearing sediment core collected from an area of active methane venting on the Vestnesa Ridge (West Svalbard continental margin) to reconstruct the local history of methane emissions over the past 23.500 yrs BP. The chronostratigraphic framework of the core has been derived from AMS C-14 dates and biostratigraphic analysis. While foraminifera from some intervals have delta C-13 within the normal marine range (0 to-1%.), five intervals are characterized by a much lower delta C-13, as low as -17.4%. These intervals are interpreted to record the incorporation of C-13-depleted carbon in the presence of methane emissions at the seafloor during biomineralization of the carbonate foraminiferal tests and subsequent secondary mineralization. Methane emission events (MEE) occur from the Last Glacial Maximum (LGM) to the Holocene, with the most prominent one, in terms of delta C-13 depletion, predating the Bolling-Allerod Interstadial (GI-1 in the Greenland ice core record). The lack of correlation between the values of delta C-13 and delta O-18, however, appears to preclude warming of bottom waters as the principal control on methane release. Rather, it seems likely that methane release is a consequence of episodicity in the supply of gas to the hydrate system and in the processes that enable methane gas to migrate through the hydrate stability field to the seabed, or of other geological processes still under debate. |
format |
Article in Journal/Newspaper |
author |
Panieri, Giuliana James, Rachael H. Camerlenghi, Angelo Westbrook, Graham Consolaro, Chiara Cacho, Isabel Cesari, Valentina Sanchez Cervera, Cristina |
author_facet |
Panieri, Giuliana James, Rachael H. Camerlenghi, Angelo Westbrook, Graham Consolaro, Chiara Cacho, Isabel Cesari, Valentina Sanchez Cervera, Cristina |
author_sort |
Panieri, Giuliana |
title |
Record of methane emissions from the West Svalbard continental margin during the last 23.500 yrs revealed by delta C-13 of benthic foraminifera |
title_short |
Record of methane emissions from the West Svalbard continental margin during the last 23.500 yrs revealed by delta C-13 of benthic foraminifera |
title_full |
Record of methane emissions from the West Svalbard continental margin during the last 23.500 yrs revealed by delta C-13 of benthic foraminifera |
title_fullStr |
Record of methane emissions from the West Svalbard continental margin during the last 23.500 yrs revealed by delta C-13 of benthic foraminifera |
title_full_unstemmed |
Record of methane emissions from the West Svalbard continental margin during the last 23.500 yrs revealed by delta C-13 of benthic foraminifera |
title_sort |
record of methane emissions from the west svalbard continental margin during the last 23.500 yrs revealed by delta c-13 of benthic foraminifera |
publisher |
Elsevier Science Bv |
publishDate |
2014 |
url |
https://archimer.ifremer.fr/doc/00245/35605/88200.pdf https://doi.org/10.1016/j.gloplacha.2014.08.014 https://archimer.ifremer.fr/doc/00245/35605/ |
geographic |
Greenland Svalbard |
geographic_facet |
Greenland Svalbard |
genre |
Greenland Greenland ice core ice core Svalbard |
genre_facet |
Greenland Greenland ice core ice core Svalbard |
op_source |
Global And Planetary Change (0921-8181) (Elsevier Science Bv), 2014-11 , Vol. 122 , P. 151-160 |
op_relation |
https://archimer.ifremer.fr/doc/00245/35605/88200.pdf doi:10.1016/j.gloplacha.2014.08.014 https://archimer.ifremer.fr/doc/00245/35605/ |
op_rights |
2014 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.gloplacha.2014.08.014 |
container_title |
Global and Planetary Change |
container_volume |
122 |
container_start_page |
151 |
op_container_end_page |
160 |
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1766019751371341824 |