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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ftdoajarticles:oai:doaj.org/article:5989681333e4448797d9455925790fcc 2024-09-15T17:44:28+00:00 Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex Claudio Argentino Kate Alyse Waghorn Sunil Vadakkepuliyambatta Stéphane Polteau Stefan Bünz Giuliana Panieri 2021-02-01T00:00:00Z https://doi.org/10.1038/s41598-021-83542-0 https://doaj.org/article/5989681333e4448797d9455925790fcc EN eng Nature Portfolio https://doi.org/10.1038/s41598-021-83542-0 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-021-83542-0 2045-2322 https://doaj.org/article/5989681333e4448797d9455925790fcc Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021) Medicine R Science Q article 2021 ftdoajarticles https://doi.org/10.1038/s41598-021-83542-0 2024-08-05T17:49:43Z 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 Barents Sea Global warming Ice Ice Sheet permafrost Sea ice Directory of Open Access Journals: DOAJ Articles Scientific Reports 11 1 |
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Medicine R Science Q Claudio Argentino Kate Alyse Waghorn Sunil Vadakkepuliyambatta Stéphane Polteau Stefan Bünz Giuliana Panieri Dynamic and history of methane seepage in the SW Barents Sea: new insights from Leirdjupet Fault Complex |
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Medicine R Science Q |
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. |
format |
Article in Journal/Newspaper |
author |
Claudio Argentino Kate Alyse Waghorn Sunil Vadakkepuliyambatta Stéphane Polteau Stefan Bünz Giuliana Panieri |
author_facet |
Claudio Argentino Kate Alyse Waghorn Sunil Vadakkepuliyambatta Stéphane Polteau Stefan Bünz Giuliana Panieri |
author_sort |
Claudio Argentino |
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 |
Nature Portfolio |
publishDate |
2021 |
url |
https://doi.org/10.1038/s41598-021-83542-0 https://doaj.org/article/5989681333e4448797d9455925790fcc |
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 |
Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021) |
op_relation |
https://doi.org/10.1038/s41598-021-83542-0 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-021-83542-0 2045-2322 https://doaj.org/article/5989681333e4448797d9455925790fcc |
op_doi |
https://doi.org/10.1038/s41598-021-83542-0 |
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Scientific Reports |
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11 |
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1 |
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1810492060025749504 |