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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ftpubmed:oai:pubmedcentral.nih.gov:4882613 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, Sébastien Ruffine, Livio 2016-05-27 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4882613/ http://www.ncbi.nlm.nih.gov/pubmed/27230887 https://doi.org/10.1038/srep26701 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4882613/ http://www.ncbi.nlm.nih.gov/pubmed/27230887 http://dx.doi.org/10.1038/srep26701 Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/srep26701 2016-06-12T00:09:53Z 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 PubMed Central (PMC) Scientific Reports 6 1 |
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Article Sultan, Nabil Garziglia, Sébastien Ruffine, Livio New insights into the transport processes controlling the sulfate-methane-transition-zone near methane vents |
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Article |
description |
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, Sébastien Ruffine, Livio |
author_facet |
Sultan, Nabil Garziglia, Sébastien 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 |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4882613/ http://www.ncbi.nlm.nih.gov/pubmed/27230887 https://doi.org/10.1038/srep26701 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4882613/ http://www.ncbi.nlm.nih.gov/pubmed/27230887 http://dx.doi.org/10.1038/srep26701 |
op_rights |
Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
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CC-BY |
op_doi |
https://doi.org/10.1038/srep26701 |
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Scientific Reports |
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1766068774469894144 |