Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex
Abstract 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 seep...
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2021
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crspringernat:10.1038/s41598-021-83542-0 2023-05-15T14:06:15+02:00 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, Stéphane Bünz, Stefan Panieri, Giuliana Norges Forskningsråd 2021 http://dx.doi.org/10.1038/s41598-021-83542-0 http://www.nature.com/articles/s41598-021-83542-0.pdf http://www.nature.com/articles/s41598-021-83542-0 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 11, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2021 crspringernat https://doi.org/10.1038/s41598-021-83542-0 2022-01-04T15:44:35Z Abstract 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. Article in Journal/Newspaper Antarc* Antarctica Arctic Barents Sea Global warming Ice Ice Sheet permafrost Sea ice Springer Nature (via Crossref) Arctic Barents Sea Leirdjupet ENVELOPE(20.833,20.833,74.333,74.333) Scientific Reports 11 1 |
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Springer Nature (via Crossref) |
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English |
topic |
Multidisciplinary |
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Multidisciplinary Argentino, Claudio Waghorn, Kate Alyse Vadakkepuliyambatta, Sunil Polteau, Stéphane Bünz, Stefan Panieri, Giuliana Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex |
topic_facet |
Multidisciplinary |
description |
Abstract 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. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Argentino, Claudio Waghorn, Kate Alyse Vadakkepuliyambatta, Sunil Polteau, Stéphane Bünz, Stefan Panieri, Giuliana |
author_facet |
Argentino, Claudio Waghorn, Kate Alyse Vadakkepuliyambatta, Sunil Polteau, Stéphane 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 |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s41598-021-83542-0 http://www.nature.com/articles/s41598-021-83542-0.pdf http://www.nature.com/articles/s41598-021-83542-0 |
long_lat |
ENVELOPE(20.833,20.833,74.333,74.333) |
geographic |
Arctic Barents Sea Leirdjupet |
geographic_facet |
Arctic Barents Sea Leirdjupet |
genre |
Antarc* Antarctica Arctic Barents Sea Global warming Ice Ice Sheet permafrost Sea ice |
genre_facet |
Antarc* Antarctica Arctic Barents Sea Global warming Ice Ice Sheet permafrost Sea ice |
op_source |
Scientific Reports volume 11, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-021-83542-0 |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
_version_ |
1766277977838977024 |