2020
DOI: 10.5194/cp-2020-15
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Abstract: Abstract. Extensive black shale deposits formed in the Early Cretaceous South Atlantic, supporting the notion that this emerging ocean basin was a globally important site of organic carbon burial. The magnitude of organic carbon burial in marine basins is known to be controlled by various tectonic, oceanographic, hydrological, and climatic processes acting on different temporal and spatial scales, the nature and relative importance of which are poorly understood for the young South Atlantic. Here we present ne… Show more

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Cited by 3 publications
(7 citation statements)
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References 77 publications
(124 reference statements)
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“…(2000)). Our results suggest in addition that sensitivity to orbital variations of a specific basin could therefore evolved over time with the tectonic forcing, as could be the case for instance for the southern Atlantic Ocean (Dummann et al., 2021), which became progressively less isolated from the global ocean during the late Cretaceous and therefore likely less prone to periodic deoxygenation.…”
Section: Discussionsupporting
confidence: 59%
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“…(2000)). Our results suggest in addition that sensitivity to orbital variations of a specific basin could therefore evolved over time with the tectonic forcing, as could be the case for instance for the southern Atlantic Ocean (Dummann et al., 2021), which became progressively less isolated from the global ocean during the late Cretaceous and therefore likely less prone to periodic deoxygenation.…”
Section: Discussionsupporting
confidence: 59%
“…(2016) based on increased black cherts occurrence. The phenomena described above would also superimposed with the change of ocean ventilation sensitivity to orbital configuration varying with pCO 2 (Dummann et al., 2021) and radiative forcing (Lunt et al., 2011) suggesting that the effect of eccentricity‐driven global deoxygenation would be mechanically amplified during extreme greenhouse episodes.…”
Section: Discussionmentioning
confidence: 99%
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“…Our results therefore suggest a significant preconditioning of the global ocean oxygenation on the runup to the OAE2 driven by paleogeographic setting of the Cenomanian. More generally, we can hypothesize that ocean preconditioning is required for OAEs to occur (See also Song et al., 2019) and that shorter‐term controllers (such as an abrupt rise of p CO 2 or an increase in nutrient supply) would then turn preconditioned areas into dysoxic or anoxic environments (See also Dummann, Steinig, Hofmann, Lenz, et al., 2020).…”
Section: Discussionmentioning
confidence: 99%
“…Our results therefore suggest a significant preconditioning of the global ocean oxygenation on the runup to the OAE2 driven by paleogeographic setting of the Cenomanian. More generally, we can hypothesize that ocean preconditioning is required for OAEs to occur (See also Song et al, 2019) and that shorter-term controllers (such as an abrupt rise of pCO 2 or an increase in nutrient supply) would then turn preconditioned areas into dysoxic or anoxic environments (See also Dummann, Steinig, Hofmann, Lenz, et al, 2020).…”
Section: The Pre-oae2 Oxygenation State: a Data/model Comparisonmentioning
confidence: 99%