Clay mineralogical and geochemical expressions of the "Late Campanian Event" in the Aquitaine and Paris basins (France): Palaeoenvironmental implications (2018)
Data creators :
Laboratoire Biogéosciences (UMR 6282),
Jean-François Deconinck [1] [2],
Pierre Pellenard [1] [2],
Emmanuelle Pucéat [1] [2],
Mathieu Martinez,
Philippe Amiotte Suchet [1] [2],
Ludovic Bruneau [1] [2],
Théophile Cocquerez [1] [2],
Francis Robaszynski [3]
Data collector :
Mathieu Martinez,
Philippe Amiotte Suchet [1] [2]
Related person :
Nicolas Thibault [4],
Ludovic Bruneau [1] [2],
Théophile Cocquerez [1] [2],
Rémi Laffont [1] [2],
Emmanuelle Pucéat [1] [2],
Francis Robaszynski [3]
[1] : Laboratoire Biogéosciences (UMR 6282) (Université de Bourgogne)
[2] : Observatoire des Sciences de l'Univers - Terre, Homme, Environnement, Temps, Astronomie (UAR 3245) (Université de Bourgogne)
[3] : Faculté Polytechnique de Mons
[4] : Department of Geosciences and Natural Resource Management - University of Copenhagen
Description :
Campanian sediments from two French sedimentary basins were studied, using clay mineralogy and stable isotope (δ13C and δ18O) geochemistry, in order to investigate the Late Campanian Event. The clay fraction of the Campanian sediments from the Tercis-les-Bains section (Aquitaine Basin) and from the Poigny borehole (Paris Basin) is mainly composed of smectite. This background sedimentation was, however, interrupted during the Upper Campanian in the two basins by a substantial increase in detrital inputs, including illite, kaolinite, and chlorite at Tercis-les-Bains, and illite at Poigny. This detrital event, resulting from the enhanced erosion of nearby continental areas triggered by increasing runoff, has also been recognized in the Tethys and South Atlantic oceans. It coincided with a global negative carbon isotope excursion, the Late Campanian Event (LCE). Carbon isotope stratigraphy was used to correlate the two basins with previously studied sections from distant areas. Spectral analysis of the bulk δ13C from Tercis-les-Bains suggests a duration of ca. 400 kyr for a pre-LCE negative excursion and ca. 800–900 kyr for the LCE sensu stricto. The detrital event, as characterized by clay mineralogy, spans the interval that comprises the pre-LCE and the LCE, with a duration of 1.3 Myr. Intensification of continental erosion during the LCE may have resulted either from the Late Campanian polyplocum regression and/or from a regional tectonic pulse that triggered the emersion of previous submerged shelf areas and the increase of silicate erosion. As the LCE seems to be recorded at a large geographic scale, it is proposed here that enhanced chemical weathering and an associated decrease in atmospheric pCO2 levels could have contributed to the long-term Late Cretaceous cooling trend.
Disciplines :
geology (sciences of the universe), geosciences, multidisciplinary (sciences of the universe), mineralogy (sciences of the universe)
Keywords :
Access details :
To access the data, please contact the scientific data manager.
All the data are available in "supplementary data" if you have an access to the whole paper.
All the data are available in "supplementary data" if you have an access to the whole paper.
General metadata
Data acquisition date :
from 15 Aug 2013 to 15 May 2014
Data acquisition methods :
- Experimental data : Minéralogie des argiles (DRX) - Isotopie du carbone (Spétrométrie de masse)
Formats :
application/msword, application/vnd.ms-excel, image/jpeg
Audience :
University: licence, University: master, Research
Coverages
Spatial coverage :
- France: latitude between 51° 20' N and 41° 15' N, longitude between 5° 15' W and 9° 50' E
Time coverage :
- Campanien: between -84 Ma and -72 Ma
Publications :
- Clay mineralogical and geochemical expressions of the “Late Campanian Event” in the Aquitaine and Paris basins (France): Palaeoenvironmental implications (doi:10.1016/j.palaeo.2016.01.040)
Publisher :
Elsevier
Record created 18 Jul 2018 by Elise Chenot.
Local identifier: FR-18008901306731-2018-07-18-02.
