Early Aptian δ¹³C and manganese anomalies from the historical Cassis-La Bédoule stratotype sections (S.E. France): relationship with a methane hydrate dissociation event and stratigraphic implications
Comparison of oxygen and carbon isotope and manganese evolution curves in bulk carbonate from the historical Bedoulian stratotype (Cassis-La Bédoule area, Provence, France) reveals an important geochemical event (negative δ¹³C and high Mn content) located within the D. deshayesi ammonite Zone and at...
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Association Carnets de Geologie
2005
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ftdoajarticles:oai:doaj.org/article:365a15c41d9a4528a96ee32ee9b425b0 2023-10-01T03:57:24+02:00 Early Aptian δ¹³C and manganese anomalies from the historical Cassis-La Bédoule stratotype sections (S.E. France): relationship with a methane hydrate dissociation event and stratigraphic implications Tronchetti Guy Bergen Jim A. Kuhnt Wolfgang Moullade Michel Masse Jean-Pierre Rafélis Marc de Emmanuel Laurent Renard Maurice 2005-11-01T00:00:00Z https://doaj.org/article/365a15c41d9a4528a96ee32ee9b425b0 EN FR eng fre Association Carnets de Geologie http://paleopolis.rediris.es/cg/CG2005_A04/index.html https://doaj.org/toc/1765-2553 https://doaj.org/toc/1634-0744 1765-2553 1634-0744 https://doaj.org/article/365a15c41d9a4528a96ee32ee9b425b0 Carnets de Géologie, Vol CG2005, p A04 (2005) Lower Aptian Bedoulian carbon and oxygen isotopes manganese methane hydrates nannoconid crisis Selli and Goguel levels Geology QE1-996.5 Paleontology QE701-760 Stratigraphy QE640-699 article 2005 ftdoajarticles 2023-09-03T00:45:43Z Comparison of oxygen and carbon isotope and manganese evolution curves in bulk carbonate from the historical Bedoulian stratotype (Cassis-La Bédoule area, Provence, France) reveals an important geochemical event (negative δ¹³C and high Mn content) located within the D. deshayesi ammonite Zone and at the base of the R. hambrowi ammonite Subzone. This worldwide event, which can be observed in environments ranging from the fluvial to the pelagic realm (Selli/Goguel level), seems to be related to methane hydrate destabilization. Scenarios for manganese, carbon and oxygen evolutions are proposed for early Bedoulian oxic conditions and for dysoxic/anoxic conditions related to methane hydrate destabilization at the early/late Bedoulian transition. The impacts of this global event on the biosphere (nannoconid crisis) and its stratigraphic implications are considered. Comparison of geochemical and biostratigraphical data from the Cassis-La Bédoule stratotype with that of the Cismon-Apticore reference borehole shows that the La Bedoule sequence records geochemical evolution during the Goguel/Selli Event in more detail than that of any other previously published section. Article in Journal/Newspaper Methane hydrate Directory of Open Access Journals: DOAJ Articles |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English French |
topic |
Lower Aptian Bedoulian carbon and oxygen isotopes manganese methane hydrates nannoconid crisis Selli and Goguel levels Geology QE1-996.5 Paleontology QE701-760 Stratigraphy QE640-699 |
spellingShingle |
Lower Aptian Bedoulian carbon and oxygen isotopes manganese methane hydrates nannoconid crisis Selli and Goguel levels Geology QE1-996.5 Paleontology QE701-760 Stratigraphy QE640-699 Tronchetti Guy Bergen Jim A. Kuhnt Wolfgang Moullade Michel Masse Jean-Pierre Rafélis Marc de Emmanuel Laurent Renard Maurice Early Aptian δ¹³C and manganese anomalies from the historical Cassis-La Bédoule stratotype sections (S.E. France): relationship with a methane hydrate dissociation event and stratigraphic implications |
topic_facet |
Lower Aptian Bedoulian carbon and oxygen isotopes manganese methane hydrates nannoconid crisis Selli and Goguel levels Geology QE1-996.5 Paleontology QE701-760 Stratigraphy QE640-699 |
description |
Comparison of oxygen and carbon isotope and manganese evolution curves in bulk carbonate from the historical Bedoulian stratotype (Cassis-La Bédoule area, Provence, France) reveals an important geochemical event (negative δ¹³C and high Mn content) located within the D. deshayesi ammonite Zone and at the base of the R. hambrowi ammonite Subzone. This worldwide event, which can be observed in environments ranging from the fluvial to the pelagic realm (Selli/Goguel level), seems to be related to methane hydrate destabilization. Scenarios for manganese, carbon and oxygen evolutions are proposed for early Bedoulian oxic conditions and for dysoxic/anoxic conditions related to methane hydrate destabilization at the early/late Bedoulian transition. The impacts of this global event on the biosphere (nannoconid crisis) and its stratigraphic implications are considered. Comparison of geochemical and biostratigraphical data from the Cassis-La Bédoule stratotype with that of the Cismon-Apticore reference borehole shows that the La Bedoule sequence records geochemical evolution during the Goguel/Selli Event in more detail than that of any other previously published section. |
format |
Article in Journal/Newspaper |
author |
Tronchetti Guy Bergen Jim A. Kuhnt Wolfgang Moullade Michel Masse Jean-Pierre Rafélis Marc de Emmanuel Laurent Renard Maurice |
author_facet |
Tronchetti Guy Bergen Jim A. Kuhnt Wolfgang Moullade Michel Masse Jean-Pierre Rafélis Marc de Emmanuel Laurent Renard Maurice |
author_sort |
Tronchetti Guy |
title |
Early Aptian δ¹³C and manganese anomalies from the historical Cassis-La Bédoule stratotype sections (S.E. France): relationship with a methane hydrate dissociation event and stratigraphic implications |
title_short |
Early Aptian δ¹³C and manganese anomalies from the historical Cassis-La Bédoule stratotype sections (S.E. France): relationship with a methane hydrate dissociation event and stratigraphic implications |
title_full |
Early Aptian δ¹³C and manganese anomalies from the historical Cassis-La Bédoule stratotype sections (S.E. France): relationship with a methane hydrate dissociation event and stratigraphic implications |
title_fullStr |
Early Aptian δ¹³C and manganese anomalies from the historical Cassis-La Bédoule stratotype sections (S.E. France): relationship with a methane hydrate dissociation event and stratigraphic implications |
title_full_unstemmed |
Early Aptian δ¹³C and manganese anomalies from the historical Cassis-La Bédoule stratotype sections (S.E. France): relationship with a methane hydrate dissociation event and stratigraphic implications |
title_sort |
early aptian δ¹³c and manganese anomalies from the historical cassis-la bédoule stratotype sections (s.e. france): relationship with a methane hydrate dissociation event and stratigraphic implications |
publisher |
Association Carnets de Geologie |
publishDate |
2005 |
url |
https://doaj.org/article/365a15c41d9a4528a96ee32ee9b425b0 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Carnets de Géologie, Vol CG2005, p A04 (2005) |
op_relation |
http://paleopolis.rediris.es/cg/CG2005_A04/index.html https://doaj.org/toc/1765-2553 https://doaj.org/toc/1634-0744 1765-2553 1634-0744 https://doaj.org/article/365a15c41d9a4528a96ee32ee9b425b0 |
_version_ |
1778528663587782656 |