Assessing controls on organic matter enrichments in hemipelagic marls of the Aptian-Lower Albian Blue Marls of the Vocontian Basin (France): an unexpected variability observed from multiple “organic-rich” levels
The Marnes Bleues Formation from the Vocontian Basin (Southeastern France) shows many dark-colored levels, some concomitant to oceanic anoxic events OAE1a (the so-called Goguel Level) and OAE1b (the Jacob, Kilian, and, above all, Paquier levels). These levels are usually referred to as being organic...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2022-01-01
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| Series: | BSGF - Earth Sciences Bulletin |
| Subjects: | |
| Online Access: | https://www.bsgf.fr/articles/bsgf/full_html/2022/01/bsgf200051/bsgf200051.html |
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| author | Caillaud Alexis Quijada Melesio Hlohowskyj Stephan R. Chappaz Anthony Bout-Roumazeilles Viviane Reynaud Jean-Yves Riboulleau Armelle Baudin François Adatte Thierry Ferry Jean-Noël Tribovillard Nicolas |
| author_facet | Caillaud Alexis Quijada Melesio Hlohowskyj Stephan R. Chappaz Anthony Bout-Roumazeilles Viviane Reynaud Jean-Yves Riboulleau Armelle Baudin François Adatte Thierry Ferry Jean-Noël Tribovillard Nicolas |
| author_sort | Caillaud Alexis |
| collection | DOAJ |
| description | The Marnes Bleues Formation from the Vocontian Basin (Southeastern France) shows many dark-colored levels, some concomitant to oceanic anoxic events OAE1a (the so-called Goguel Level) and OAE1b (the Jacob, Kilian, and, above all, Paquier levels). These levels are usually referred to as being organic-rich; they are scattered through a thick, rather homogeneous, succession of marls, that is poor in organic matter (OM). Through a multi-parameter approach, the dark levels from the Aptian-Albian were characterized. Our results show that all dark levels are not OM-rich and that the dark levels exhibit variable characteristics, such as OM nature (marine vs. continental), sedimentation and accumulation rates, redox conditions, surface-water productivity and relative sea level, but they all show low to modest enrichments in OM. Furthermore, all the levels share in common the fact that they formed under conditions of normal to low productivity and oxic to suboxic conditions. Thus, our results strongly suggest that, in the absence of high productivity and anoxic bottom conditions, the other factors reputed to favor OM accumulation only led to sporadic and low enrichments in organic contents. It is as if such factors could only enhance OM accumulation but could not induce it alone. What was true for the Vocontian Basin may be extended to other settings, regardless of their time of deposition or location. |
| first_indexed | 2024-04-13T09:25:29Z |
| format | Article |
| id | doaj.art-7023c642ee4d4fd9b0af9253745759e9 |
| institution | Directory Open Access Journal |
| issn | 1777-5817 |
| language | English |
| last_indexed | 2024-04-13T09:25:29Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | BSGF - Earth Sciences Bulletin |
| spelling | doaj.art-7023c642ee4d4fd9b0af9253745759e92022-12-22T02:52:28ZengEDP SciencesBSGF - Earth Sciences Bulletin1777-58172022-01-01193210.1051/bsgf/2022001bsgf200051Assessing controls on organic matter enrichments in hemipelagic marls of the Aptian-Lower Albian Blue Marls of the Vocontian Basin (France): an unexpected variability observed from multiple “organic-rich” levelsCaillaud Alexis0Quijada Melesio1https://orcid.org/0000-0001-7300-983XHlohowskyj Stephan R.2Chappaz Anthony3https://orcid.org/0000-0001-8713-8456Bout-Roumazeilles Viviane4https://orcid.org/0000-0001-6917-818XReynaud Jean-Yves5https://orcid.org/0000-0003-3665-8149Riboulleau Armelle6https://orcid.org/0000-0002-2717-8330Baudin François7https://orcid.org/0000-0003-3180-459XAdatte Thierry8Ferry Jean-Noël9Tribovillard Nicolas10https://orcid.org/0000-0003-3493-5579Université de Lille, Laboratoire d’Océanologie et Géosciences, UMR LOG CNRS-Université de Lille-ULCOUniversité de Lille, Laboratoire d’Océanologie et Géosciences, UMR LOG CNRS-Université de Lille-ULCOSTARLAB, Department of Earth and Atmospheric Sciences, Central Michigan UniversitySTARLAB, Department of Earth and Atmospheric Sciences, Central Michigan UniversityUniversité de Lille, Laboratoire d’Océanologie et Géosciences, UMR LOG CNRS-Université de Lille-ULCOUniversité de Lille, Laboratoire d’Océanologie et Géosciences, UMR LOG CNRS-Université de Lille-ULCOUniversité de Lille, Laboratoire d’Océanologie et Géosciences, UMR LOG CNRS-Université de Lille-ULCOSorbonne Universités, UPMC Univ. Paris 06, CNRS, ISTEPInstitute of Earth Sciences, University of LausanneTOTAL S.A., CSTJFUniversité de Lille, Laboratoire d’Océanologie et Géosciences, UMR LOG CNRS-Université de Lille-ULCOThe Marnes Bleues Formation from the Vocontian Basin (Southeastern France) shows many dark-colored levels, some concomitant to oceanic anoxic events OAE1a (the so-called Goguel Level) and OAE1b (the Jacob, Kilian, and, above all, Paquier levels). These levels are usually referred to as being organic-rich; they are scattered through a thick, rather homogeneous, succession of marls, that is poor in organic matter (OM). Through a multi-parameter approach, the dark levels from the Aptian-Albian were characterized. Our results show that all dark levels are not OM-rich and that the dark levels exhibit variable characteristics, such as OM nature (marine vs. continental), sedimentation and accumulation rates, redox conditions, surface-water productivity and relative sea level, but they all show low to modest enrichments in OM. Furthermore, all the levels share in common the fact that they formed under conditions of normal to low productivity and oxic to suboxic conditions. Thus, our results strongly suggest that, in the absence of high productivity and anoxic bottom conditions, the other factors reputed to favor OM accumulation only led to sporadic and low enrichments in organic contents. It is as if such factors could only enhance OM accumulation but could not induce it alone. What was true for the Vocontian Basin may be extended to other settings, regardless of their time of deposition or location.https://www.bsgf.fr/articles/bsgf/full_html/2022/01/bsgf200051/bsgf200051.htmlorganic matterblack shalesmarnes bleues formationcretaceousproductivity |
| spellingShingle | Caillaud Alexis Quijada Melesio Hlohowskyj Stephan R. Chappaz Anthony Bout-Roumazeilles Viviane Reynaud Jean-Yves Riboulleau Armelle Baudin François Adatte Thierry Ferry Jean-Noël Tribovillard Nicolas Assessing controls on organic matter enrichments in hemipelagic marls of the Aptian-Lower Albian Blue Marls of the Vocontian Basin (France): an unexpected variability observed from multiple “organic-rich” levels BSGF - Earth Sciences Bulletin organic matter black shales marnes bleues formation cretaceous productivity |
| title | Assessing controls on organic matter enrichments in hemipelagic marls of the Aptian-Lower Albian Blue Marls of the Vocontian Basin (France): an unexpected variability observed from multiple “organic-rich” levels |
| title_full | Assessing controls on organic matter enrichments in hemipelagic marls of the Aptian-Lower Albian Blue Marls of the Vocontian Basin (France): an unexpected variability observed from multiple “organic-rich” levels |
| title_fullStr | Assessing controls on organic matter enrichments in hemipelagic marls of the Aptian-Lower Albian Blue Marls of the Vocontian Basin (France): an unexpected variability observed from multiple “organic-rich” levels |
| title_full_unstemmed | Assessing controls on organic matter enrichments in hemipelagic marls of the Aptian-Lower Albian Blue Marls of the Vocontian Basin (France): an unexpected variability observed from multiple “organic-rich” levels |
| title_short | Assessing controls on organic matter enrichments in hemipelagic marls of the Aptian-Lower Albian Blue Marls of the Vocontian Basin (France): an unexpected variability observed from multiple “organic-rich” levels |
| title_sort | assessing controls on organic matter enrichments in hemipelagic marls of the aptian lower albian blue marls of the vocontian basin france an unexpected variability observed from multiple organic rich levels |
| topic | organic matter black shales marnes bleues formation cretaceous productivity |
| url | https://www.bsgf.fr/articles/bsgf/full_html/2022/01/bsgf200051/bsgf200051.html |
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