The University of Southampton
University of Southampton Institutional Repository

Causes for the formation of the Late Aptian Niveau Fallot black shales in the Vocontian Basin (SE France): Evidence from planktic and benthic foraminifera and stable isotopes

Friedrich, O., Reichelt, K., Herrle, J.O., Lehmann, J., Pross, J. and Hemleben, C. (2003) Causes for the formation of the Late Aptian Niveau Fallot black shales in the Vocontian Basin (SE France): Evidence from planktic and benthic foraminifera and stable isotopes Marine Micropaleontology, 49, (1-2), pp. 65-85. (doi:10.1016/S0377-8398(03)00029-X).

Record type: Article

Abstract

We present paleoceanographic models for the formation of the marlstone facies and the most prominent black shale intervals of the Late Aptian Niveau Fallot black shale succession from the Vocontian Basin (SE France). In the lower part of the succession, the composition of benthic foraminiferal assemblages of the Niveau Fallot 2? and 2? black shales suggests an enhanced burial of organic matter due to more eutrophic conditions and resulting low oxygen conditions at the seafloor. In the upper part of the succession (including Niveau Fallot 3 and 4), a third-order sea-level fall, indicated by a decrease in the stable carbon isotope values, may have resulted in a reduced water mass exchange between the Vocontian Basin and the western Tethyan Ocean. This may have led to dysoxic conditions at the seafloor of the Vocontian Basin and may have favored the formation of organic-rich sediments as shown by benthic foraminiferal assemblages. Decreased evaporation, however, is proposed as the most important mechanism causing a restriction of deep water formation within the basin which finally led to the formation of the Niveau Fallot 3 and 4 black shales. Based on our investigations, the formation of the Niveau Fallot black shales was caused by different factors, the most prominent ones include sea-level fluctuations, increasing productivity, and changes in precipitation and evaporation rates. Furthermore, Niveau Fallot 3 can probably be correlated with the Thalmann black shale event in California and a dark horizon at the Mazagan Plateau (DSDP Site 545).

Full text not available from this repository.

More information

Published date: September 2003
Keywords: Cretaceous, black shale, benthic foraminifera, planktic foraminifera, palynomorphs, stable isotopes

Identifiers

Local EPrints ID: 49982
URI: http://eprints.soton.ac.uk/id/eprint/49982
ISSN: 0377-8398
PURE UUID: 64f086fb-6808-4cb7-9c73-347efda235ec

Catalogue record

Date deposited: 08 Jan 2008
Last modified: 17 Jul 2017 14:54

Export record

Altmetrics

Contributors

Author: O. Friedrich
Author: K. Reichelt
Author: J.O. Herrle
Author: J. Lehmann
Author: J. Pross
Author: C. Hemleben

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×