The Valanginian δ13C excursion may not be an expression of a global oceanic anoxic event

Westermann, Stéphane; Föllmi, Karl B.; Adatte, Thierry; Matera, Virginie; Schnyder, Johann; Fleitmann, Dominik; Fiet, Nicolas; Ploch, Izabela; Duchamp‐Alphonse, Stéphanie

doi:10.1016/j.epsl.2009.12.011

Cited by 86 publications

(56 citation statements)

References 57 publications

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“…As pointed by Westermann et al (2010), Valanginian marine sediments deposited during the carbon isotope event are poor in residual organic carbon and organic rich deposit could attain few centimeters thickness only being limited to few localities. The same situation is in the Valanginian e Lower Hauterivian limestone sequence of the Manín Unit (80e90% of CaCO 3 ) where the organic carbon content is very low, ranging from 0.01 to 0.2%.…”

Section: Geochemistry Of the Valanginian E Barremian Hemipelagic Sequmentioning

confidence: 98%

Early Cretaceous sedimentary evolution of a pelagic basin margin (the Manín Unit, central Western Carpathians, Slovakia)

Michalı́k

Lintnerová

Reháková

et al. 2012

Cretaceous Research

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Section: Geochemistry Of the Valanginian E Barremian Hemipelagic Sequmentioning

confidence: 98%

Early Cretaceous sedimentary evolution of a pelagic basin margin (the Manín Unit, central Western Carpathians, Slovakia)

Michalı́k

Lintnerová

Reháková

et al. 2012

Cretaceous Research

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“…There is a certain debate over the latter interrelation. On the contrary, no evidence of an OAE from transects in the western Tethys from the Valaginian period of time (Early Cretaceous) was found [34]. The concentrations of the redox-sensitive elements like U, V, Co and Mo were not as enriched as expected for reductive bottom-water conditions within the respective transects.…”

Section: Introductionmentioning

confidence: 79%

Trace Elements in Marine Sediments from the Oxfordian (Late Jurassic): Implications for Seawater Chemistry, Erosional Processes, Changes in Oceanic Circulation and More

Müller¹

2012

TOGEOJ

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Abstract:The Oxfordian, first stage of the late Jurassic, is remarkably variable in terms of deposited sediments, geochemical tracers, and climate. The climate changed during the Middle Oxfordian from humid to arid with a temperature rise of more than five degrees. During this time, the 13 C reached maximum values. The positive excursion in 13 C of carbonates from the Oxfordian (with an amplitude of more than 1‰) was reproduced in hemipelagic sections from southeastern France. Analysis of major and trace elements of these carbonates were carried out by LA-ICP-MS in order to verify their application as palaeoproxies in conjunction with the changes mentioned in climate. As a novel approach 36 elements were measured with regard to establish a complete and comprehensive analysis of the geochemical situation. Concentration peaks of P, Sr, Mn, Fe, Ba point to a more oligotrophic setting within the lower part of the sediment profile from southeastern France. Conversely, the positive 13 C excursion with 13 C values rising from 2 to 3 ‰ within the uppermost part of the profile coincide with more elevated concentrations of V, Fe, Mn, U arguing for an ocean-wide anoxia (Oceanic Anoxic Events OAE). High detrital input during this arid period is recorded by enhanced concentrations of elements like Ti, Mn, Fe, Zr, Nb and W. This correlation of the 13 C excursion with trends in Ti, Nb, W as well as Mn and Fe contents reflects changes in the Oxfordian palaeooceanography and climate. During the late Oxfordian the environmental prerequisites were controlled by warm and arid conditions and an increased metal flux from the continent due to the intensified chemical and physical weathering, erosion of rocks, as well as aeolian and fluvial transport to the oceans.

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“…6). The decrease in dissolved U in seawater during the Weissert Event C-isotope anomaly is also registered in several Circum Tethyan carbonate successions (Westermann et al 2010).…”

Section: Depositional Age Of the Kesima Membermentioning

confidence: 98%

Sedimentology and chemostratigraphy of a Valanginian carbonate succession from the Baja Guajira Basin, northern Colombia

et al. 2016

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ABSTRACT:The Kesima Member of the Palanz Formation constitutes the first record of Cretaceous marine sedimentation along the Baja Guajira Basin, northern Colombia. Sedimentologic and petrographic analyses suggest a deposition along a coral reef dominated rimmed carbonate platform.87 Sr/ 86 Sr values between 0.707350 and 0.707400 suggest a Valanginian (136 -132 Ma) depositional age for the Kesima Member. A positive anomaly on the δ 13 C values of ~2.2‰ suggests that this rimmed carbonate platform registered the Valanginian Weissert oceanic anoxic event. Although the Weissert oceanic anoxic event resulted on a major drowning of the Circum Tethyan carbonate platforms, it seems to have not affected those from the Circum Caribbean, where several shallow marine carbonate platform successions crop out. The Kesima Member displays a change from an organically produced carbonate factory into an inorganically produced, ooids dominated, carbonate factory during the peak of the Weissert event δ 13 C anomaly. This change in the carbonate factory, which may represent a major perturbation of the marine carbonate budget along tropical settings during the Weissert event, coincides with a major decrease in global sea level. Finally, the age of the Kesima Member is considerably older than that of other Cretaceous carbonate successions cropping out in other northern South America sedimentary basins (i.e. Perija-Merida, Cesar-Rancheria). Differences in the timing of the Cretaceous marine incursion along northern South America, together with the differences in the Triassic-Jurassic stratigraphy of several sedimentary basins in northern South America, suggest that the Baja Guajira and Maracaibo basins remained as an isolated tectonic block separated from northern South America after the breakup of Pangea. KEYWORDS:

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The Valanginian δ13C excursion may not be an expression of a global oceanic anoxic event

Cited by 86 publications

References 57 publications

Early Cretaceous sedimentary evolution of a pelagic basin margin (the Manín Unit, central Western Carpathians, Slovakia)

Early Cretaceous sedimentary evolution of a pelagic basin margin (the Manín Unit, central Western Carpathians, Slovakia)

Trace Elements in Marine Sediments from the Oxfordian (Late Jurassic): Implications for Seawater Chemistry, Erosional Processes, Changes in Oceanic Circulation and More

Sedimentology and chemostratigraphy of a Valanginian carbonate succession from the Baja Guajira Basin, northern Colombia

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