Impact of methane seeps on the local carbon‐isotope record: a case study from a Late Jurassic hemipelagic section
Abstract An Oxfordian (Late Jurassic) hemipelagic succession from Beauvoisin (SE France) contains a pronounced, short‐lived negative excursion in the bulk‐carbonate carbon‐isotope record, with an amplitude of 4‰. It was shown previously that the Beauvoisin paleoenvironment was impacted by hydrocarbo...
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crwiley:10.1111/j.1365-3121.2007.00744.x 2024-09-15T18:18:40+00:00 Impact of methane seeps on the local carbon‐isotope record: a case study from a Late Jurassic hemipelagic section Louis‐Schmid, Beat Rais, Pauline Logvinovich, Dmitry Bernasconi, Stefano M. Weissert, Helmut 2007 http://dx.doi.org/10.1111/j.1365-3121.2007.00744.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3121.2007.00744.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3121.2007.00744.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Terra Nova volume 19, issue 4, page 259-265 ISSN 0954-4879 1365-3121 journal-article 2007 crwiley https://doi.org/10.1111/j.1365-3121.2007.00744.x 2024-07-25T04:24:04Z Abstract An Oxfordian (Late Jurassic) hemipelagic succession from Beauvoisin (SE France) contains a pronounced, short‐lived negative excursion in the bulk‐carbonate carbon‐isotope record, with an amplitude of 4‰. It was shown previously that the Beauvoisin paleoenvironment was impacted by hydrocarbon seepage. New isotopic data corroborate that methane was a significant constituent of these hydrocarbons. The negative excursion was caused by transient enhanced precipitation of 13 C‐depleted carbonate, mediated by anaerobic oxidation of methane. Despite its local diagenetic origin, the Beauvoisin excursion is similar in shape and duration to globally recognized negative C‐isotope excursions that have been related to catastrophic, massive dissociation of methane hydrate. Shape and duration of negative excursions therefore cannot be used as an argument when determining their origin if they have not been shown to represent a global perturbation of the carbon cycle. Article in Journal/Newspaper Methane hydrate Wiley Online Library Terra Nova 19 4 259 265 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract An Oxfordian (Late Jurassic) hemipelagic succession from Beauvoisin (SE France) contains a pronounced, short‐lived negative excursion in the bulk‐carbonate carbon‐isotope record, with an amplitude of 4‰. It was shown previously that the Beauvoisin paleoenvironment was impacted by hydrocarbon seepage. New isotopic data corroborate that methane was a significant constituent of these hydrocarbons. The negative excursion was caused by transient enhanced precipitation of 13 C‐depleted carbonate, mediated by anaerobic oxidation of methane. Despite its local diagenetic origin, the Beauvoisin excursion is similar in shape and duration to globally recognized negative C‐isotope excursions that have been related to catastrophic, massive dissociation of methane hydrate. Shape and duration of negative excursions therefore cannot be used as an argument when determining their origin if they have not been shown to represent a global perturbation of the carbon cycle. |
format |
Article in Journal/Newspaper |
author |
Louis‐Schmid, Beat Rais, Pauline Logvinovich, Dmitry Bernasconi, Stefano M. Weissert, Helmut |
spellingShingle |
Louis‐Schmid, Beat Rais, Pauline Logvinovich, Dmitry Bernasconi, Stefano M. Weissert, Helmut Impact of methane seeps on the local carbon‐isotope record: a case study from a Late Jurassic hemipelagic section |
author_facet |
Louis‐Schmid, Beat Rais, Pauline Logvinovich, Dmitry Bernasconi, Stefano M. Weissert, Helmut |
author_sort |
Louis‐Schmid, Beat |
title |
Impact of methane seeps on the local carbon‐isotope record: a case study from a Late Jurassic hemipelagic section |
title_short |
Impact of methane seeps on the local carbon‐isotope record: a case study from a Late Jurassic hemipelagic section |
title_full |
Impact of methane seeps on the local carbon‐isotope record: a case study from a Late Jurassic hemipelagic section |
title_fullStr |
Impact of methane seeps on the local carbon‐isotope record: a case study from a Late Jurassic hemipelagic section |
title_full_unstemmed |
Impact of methane seeps on the local carbon‐isotope record: a case study from a Late Jurassic hemipelagic section |
title_sort |
impact of methane seeps on the local carbon‐isotope record: a case study from a late jurassic hemipelagic section |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1365-3121.2007.00744.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3121.2007.00744.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3121.2007.00744.x |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Terra Nova volume 19, issue 4, page 259-265 ISSN 0954-4879 1365-3121 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-3121.2007.00744.x |
container_title |
Terra Nova |
container_volume |
19 |
container_issue |
4 |
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259 |
op_container_end_page |
265 |
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1810456752755310592 |