Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex
Methane emissions from Arctic continental margins are increasing due to the negative effect of global warming on ice sheet and permafrost stability, but dynamics and timescales of seafloor seepage still remain poorly constrained. Here, we examine sediment cores collected from an active seepage area...
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Online Access: | https://hdl.handle.net/11250/2735220 https://doi.org/10.1038/s41598-021-83542-0 |
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ftinstenergitekn:oai:ife.brage.unit.no:11250/2735220 2024-09-15T17:41:51+00:00 Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex Argentino, Claudio Waghorn, Kate Alyse Vadakkepuliyambatta, Sunil Polteau, Stephane Bünz, Stefan Panieri, Giuliana 2021 application/pdf https://hdl.handle.net/11250/2735220 https://doi.org/10.1038/s41598-021-83542-0 eng eng Norges forskningsråd: 223259 urn:issn:2045-2322 https://hdl.handle.net/11250/2735220 https://doi.org/10.1038/s41598-021-83542-0 cristin:1893040 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The Author(s) 2021 11 Scientific Reports Peer reviewed Journal article 2021 ftinstenergitekn https://doi.org/10.1038/s41598-021-83542-0 2024-08-14T03:05:51Z Methane emissions from Arctic continental margins are increasing due to the negative effect of global warming on ice sheet and permafrost stability, but dynamics and timescales of seafloor seepage still remain poorly constrained. Here, we examine sediment cores collected from an active seepage area located between 295 and 353 m water depth in the SW Barents Sea, at Leirdjupet Fault Complex. The geochemical composition of hydrocarbon gas in the sediment indicates a mixture of microbial and thermogenic gas, the latter being sourced from underlying Mesozoic formations. Sediment and carbonate geochemistry reveal a long history of methane emissions that started during Late Weichselian deglaciation after 14.5 cal ka BP. Methane-derived authigenic carbonates precipitated due to local gas hydrate destabilization, in turn triggered by an increasing influx of warm Atlantic water and isostatic rebound linked to the retreat of the Barents Sea Ice Sheet. This study has implications for a better understanding of the dynamic and future evolution of methane seeps in modern analogue systems in Western Antarctica, where the retreat of marine-based ice sheet induced by global warming may cause the release of large amounts of methane from hydrocarbon reservoirs and gas hydrates. publishedVersion Article in Journal/Newspaper Antarc* Antarctica Barents Sea Global warming Ice Ice Sheet permafrost Sea ice Institute for Energy Technology: IFE Brage Scientific Reports 11 1 |
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Institute for Energy Technology: IFE Brage |
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language |
English |
description |
Methane emissions from Arctic continental margins are increasing due to the negative effect of global warming on ice sheet and permafrost stability, but dynamics and timescales of seafloor seepage still remain poorly constrained. Here, we examine sediment cores collected from an active seepage area located between 295 and 353 m water depth in the SW Barents Sea, at Leirdjupet Fault Complex. The geochemical composition of hydrocarbon gas in the sediment indicates a mixture of microbial and thermogenic gas, the latter being sourced from underlying Mesozoic formations. Sediment and carbonate geochemistry reveal a long history of methane emissions that started during Late Weichselian deglaciation after 14.5 cal ka BP. Methane-derived authigenic carbonates precipitated due to local gas hydrate destabilization, in turn triggered by an increasing influx of warm Atlantic water and isostatic rebound linked to the retreat of the Barents Sea Ice Sheet. This study has implications for a better understanding of the dynamic and future evolution of methane seeps in modern analogue systems in Western Antarctica, where the retreat of marine-based ice sheet induced by global warming may cause the release of large amounts of methane from hydrocarbon reservoirs and gas hydrates. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Argentino, Claudio Waghorn, Kate Alyse Vadakkepuliyambatta, Sunil Polteau, Stephane Bünz, Stefan Panieri, Giuliana |
spellingShingle |
Argentino, Claudio Waghorn, Kate Alyse Vadakkepuliyambatta, Sunil Polteau, Stephane Bünz, Stefan Panieri, Giuliana Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex |
author_facet |
Argentino, Claudio Waghorn, Kate Alyse Vadakkepuliyambatta, Sunil Polteau, Stephane Bünz, Stefan Panieri, Giuliana |
author_sort |
Argentino, Claudio |
title |
Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex |
title_short |
Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex |
title_full |
Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex |
title_fullStr |
Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex |
title_full_unstemmed |
Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex |
title_sort |
dynamic and history of methane seepage in the sw barents sea: new insights from leirdjupet fault complex |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2735220 https://doi.org/10.1038/s41598-021-83542-0 |
genre |
Antarc* Antarctica Barents Sea Global warming Ice Ice Sheet permafrost Sea ice |
genre_facet |
Antarc* Antarctica Barents Sea Global warming Ice Ice Sheet permafrost Sea ice |
op_source |
11 Scientific Reports |
op_relation |
Norges forskningsråd: 223259 urn:issn:2045-2322 https://hdl.handle.net/11250/2735220 https://doi.org/10.1038/s41598-021-83542-0 cristin:1893040 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The Author(s) 2021 |
op_doi |
https://doi.org/10.1038/s41598-021-83542-0 |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
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1810488142104363008 |