New insights into the transport processes controlling the sulfate-methane-transition-zone near methane vents
Over the past years, several studies have raised concerns about the possible interactions between methane hydrate decomposition and external change. To carry out such an investigation, it is essential to characterize the baseline dynamics of gas hydrate systems related to natural geological and sedi...
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fttriple:oai:gotriple.eu:10670/1.y7uesh 2023-05-15T17:12:01+02:00 New insights into the transport processes controlling the sulfate-methane-transition-zone near methane vents Sultan, Nabil Garziglia, Sebastien Ruffine, Livio https://doi.org/10.1038/srep26701 https://archimer.ifremer.fr/doc/00339/45068/44493.pdf https://archimer.ifremer.fr/doc/00339/45068/ en eng Nature Publishing Group doi:10.1038/srep26701 10670/1.y7uesh https://archimer.ifremer.fr/doc/00339/45068/44493.pdf https://archimer.ifremer.fr/doc/00339/45068/ lic_creative-commons other Archimer, archive institutionnelle de l'Ifremer Scientific Reports (2045-2322) (Nature Publishing Group), 2016-05 , Vol. 6 , N. 26701 , P. 9p. geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1038/srep26701 2023-01-22T17:11:05Z Over the past years, several studies have raised concerns about the possible interactions between methane hydrate decomposition and external change. To carry out such an investigation, it is essential to characterize the baseline dynamics of gas hydrate systems related to natural geological and sedimentary processes. This is usually treated through the analysis of sulfate-reduction coupled to anaerobic oxidation of methane (AOM). Here, we model sulfate reduction coupled with AOM as a two-dimensional (2D) problem including, advective and diffusive transport. This is applied to a case study from a deep-water site off Nigeria’s coast where lateral methane advection through turbidite layers was suspected. We show by analyzing the acquired data in combination with computational modeling that a two-dimensional approach is able to accurately describe the recent past dynamics of such a complex natural system. Our results show that the sulfate-methane-transition-zone (SMTZ) is not a vertical barrier for dissolved sulfate and methane. We also show that such a modeling is able to assess short timescale variations in the order of decades to centuries. Text Methane hydrate Unknown Scientific Reports 6 1 |
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geo envir Sultan, Nabil Garziglia, Sebastien Ruffine, Livio New insights into the transport processes controlling the sulfate-methane-transition-zone near methane vents |
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Over the past years, several studies have raised concerns about the possible interactions between methane hydrate decomposition and external change. To carry out such an investigation, it is essential to characterize the baseline dynamics of gas hydrate systems related to natural geological and sedimentary processes. This is usually treated through the analysis of sulfate-reduction coupled to anaerobic oxidation of methane (AOM). Here, we model sulfate reduction coupled with AOM as a two-dimensional (2D) problem including, advective and diffusive transport. This is applied to a case study from a deep-water site off Nigeria’s coast where lateral methane advection through turbidite layers was suspected. We show by analyzing the acquired data in combination with computational modeling that a two-dimensional approach is able to accurately describe the recent past dynamics of such a complex natural system. Our results show that the sulfate-methane-transition-zone (SMTZ) is not a vertical barrier for dissolved sulfate and methane. We also show that such a modeling is able to assess short timescale variations in the order of decades to centuries. |
format |
Text |
author |
Sultan, Nabil Garziglia, Sebastien Ruffine, Livio |
author_facet |
Sultan, Nabil Garziglia, Sebastien Ruffine, Livio |
author_sort |
Sultan, Nabil |
title |
New insights into the transport processes controlling the sulfate-methane-transition-zone near methane vents |
title_short |
New insights into the transport processes controlling the sulfate-methane-transition-zone near methane vents |
title_full |
New insights into the transport processes controlling the sulfate-methane-transition-zone near methane vents |
title_fullStr |
New insights into the transport processes controlling the sulfate-methane-transition-zone near methane vents |
title_full_unstemmed |
New insights into the transport processes controlling the sulfate-methane-transition-zone near methane vents |
title_sort |
new insights into the transport processes controlling the sulfate-methane-transition-zone near methane vents |
publisher |
Nature Publishing Group |
url |
https://doi.org/10.1038/srep26701 https://archimer.ifremer.fr/doc/00339/45068/44493.pdf https://archimer.ifremer.fr/doc/00339/45068/ |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Archimer, archive institutionnelle de l'Ifremer Scientific Reports (2045-2322) (Nature Publishing Group), 2016-05 , Vol. 6 , N. 26701 , P. 9p. |
op_relation |
doi:10.1038/srep26701 10670/1.y7uesh https://archimer.ifremer.fr/doc/00339/45068/44493.pdf https://archimer.ifremer.fr/doc/00339/45068/ |
op_rights |
lic_creative-commons other |
op_doi |
https://doi.org/10.1038/srep26701 |
container_title |
Scientific Reports |
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6 |
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1 |
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1766068766070800384 |