New insights into the early Bajocian (Middle Jurassic) carbon cycle perturbation Article Swipe
Baptiste Suchéras-Marx
,
Guillaume Suan
,
Fabienne Giraud
,
Emanuela Mattioli
,
Hassan Khozyem
,
Jean-Charles Mazur
,
Alicia Fantasia
,
Jorge E. Spangenberg
,
Thierry Adatte
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.57035/journals/sdk.2023.e11.1195
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.57035/journals/sdk.2023.e11.1195
Mesozoic strata record numerous negative and positive carbon isotope excursions (CIEs). The Middle Jurassic records a negative ~0.5 ‰ CIE at the Aalenian-Bajocian boundary followed by a positive ~1.5 ‰ CIE covering the entire early Bajocian. Although these CIEs are recorded in northern and southwestern Tethys and may reflect perturbations of the global carbon cycle, they remain poorly investigated. In this study, we present new geochemical and sedimentological data from the Chaudon-Norante section in France and Murtinheira section in Portugal to better constrain the origin of the lower Bajocian CIEs. Associated with the previously published carbon isotopic composition of bulk carbonate (δ13Cbulk carbonate) we provide new carbon isotopic composition of bulk organic matter (δ13Corg) records, as well as total phosphorus content, phosphorus accumulation rates (AR), and CaCO3 and organic matter data. In contrast with previous interpretations, our results show no evidence of a carbonate production crisis during the early Bajocian. A slight increase in siliciclastic and phosphorus AR would argue for oceanic fertilization but without a parallel increase in organic matter AR. The obtained stratigraphic δ13Cbulk carbonate vs. δ13Corg patterns are distinctive and mimic previous box modeling results simulating an increase in productivity forced by higher phosphorus rates from riverine and weathered-carbon input burial. The subsequent organic carbon burial produced counter-greenhouse conditions, which in turn produced a cooling by CO2 uptake. Our results indicate that the lower Bajocian event shows several similarities with the late Valanginian positive CIE (also known as the Weissert event). An accurate comparison of both events may help for a better understanding of the origin and consequence of such carbon cycle perturbations.
Related Topics
Concepts
Carbonate
Geology
Carbon fibers
Isotopes of carbon
Paleontology
Organic matter
Total organic carbon
Carbon cycle
Mesozoic
Siliciclastic
Mineralogy
Chemistry
Ecosystem
Facies
Environmental chemistry
Materials science
Ecology
Biology
Organic chemistry
Composite number
Composite material
Structural basin
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.57035/journals/sdk.2023.e11.1195
- https://oap.unige.ch/journals/sdk/article/download/1195/1320
- OA Status
- diamond
- Cited By
- 2
- References
- 92
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4377938695
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4377938695Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.57035/journals/sdk.2023.e11.1195Digital Object Identifier
- Title
-
New insights into the early Bajocian (Middle Jurassic) carbon cycle perturbationWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2023Year of publication
- Publication date
-
2023-11-24Full publication date if available
- Authors
-
Baptiste Suchéras-Marx, Guillaume Suan, Fabienne Giraud, Emanuela Mattioli, Hassan Khozyem, Jean-Charles Mazur, Alicia Fantasia, Jorge E. Spangenberg, Thierry AdatteList of authors in order
- Landing page
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https://doi.org/10.57035/journals/sdk.2023.e11.1195Publisher landing page
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https://oap.unige.ch/journals/sdk/article/download/1195/1320Direct link to full text PDF
- Open access
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YesWhether a free full text is available
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diamondOpen access status per OpenAlex
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https://oap.unige.ch/journals/sdk/article/download/1195/1320Direct OA link when available
- Concepts
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Carbonate, Geology, Carbon fibers, Isotopes of carbon, Paleontology, Organic matter, Total organic carbon, Carbon cycle, Mesozoic, Siliciclastic, Mineralogy, Chemistry, Ecosystem, Facies, Environmental chemistry, Materials science, Ecology, Biology, Organic chemistry, Composite number, Composite material, Structural basinTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
2Total citation count in OpenAlex
- Citations by year (recent)
-
2024: 1, 2023: 1Per-year citation counts (last 5 years)
- References (count)
-
92Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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