Continental weathering as a driver of Late Cretaceous cooling: new insights from clay mineralogy of Campanian sediments from the southern Tethyan margin to the Boreal realm (2018)
Data creators : Laboratoire Biogéosciences (UMR 6282), Jean-François Deconinck  , Pierre Pellenard  , Emmanuelle Pucéat  , Michel Guiraud  , Rémi Laffont  , Ludovic Bruneau  , Théophile Cocquerez  , Philippe Amiotte Suchet  , Nicolas Thibault , Ian Jarvis , Mohammad Razmjoeei , James Richard  , Jean-Pierre Sizun  , Maxime Jaubert, Elise Chenot  
 : Laboratoire Biogéosciences (UMR 6282) (Université de Bourgogne)
 : Observatoire des Sciences de l'Univers - Terre, Homme, Environnement, Temps, Astronomie (UAR 3245) (Université de Bourgogne)
 : Department of Geosciences and Natural Resource Management - University of Copenhagen
 : Kingston University London, Department of Geography and Geology
 : Department of Geology, Shahid Beheshti University
 : Laboratoire Chrono-environnement (UMR 6249) (Université de Franche-Comté)
 : Observatoire des Sciences de l'Univers - Terre, Homme, Environnement, Temps, Astronomie (UAR 3245) (Université de Franche-Comté)
New clay mineralogical analyses have been performed on Campanian sediments from the Tethyan and Boreal realms along a palaeolatitudinal transect from 45° to 20°N (Danish Basin, North Sea, Paris Basin, Mons Basin, Aquitaine Basin, Umbria-Marche Basin and Tunisian Atlas). Significant terrigenous inputs are evidenced by increasing proportions of detrital clay minerals such as illite, kaolinite and chlorite at various levels in the mid- to upper Campanian, while smectitic minerals predominate and represented the background of the Late Cretaceous clay sedimentation. Our new results highlight a distinct latitudinal distribution of clay minerals, with the occurrence of kaolinite in southern sections and an almost total absence of this mineral in northern areas. This latitudinal trend points to an at least partial climatic control on clay mineral sedimentation, with a humid zone developed between 20° and 35°N. The association and co-evolution of illite, chlorite and kaolinite in most sections suggest a reworking of these minerals from basement rocks weathered by hydrolysis, which we link to the formation of relief around the Tethys due to compression associated with incipient Tethyan closure. Diachronism in the occurrence of detrital minerals between sections, with detrital input starting earlier during the Santonian in the south than in the north, highlights the northward progression of the deformation related to the anticlockwise rotation of Africa. Increasing continental weathering and erosion, evidenced by our clay mineralogical data through the Campanian, may have resulted in enhanced CO2 consumption by silicate weathering, thereby contributing to Late Cretaceous climatic cooling.
Access details :
To access the data, please contact the scientific data manager. All the data are available on line in the "supplementary material" if you have an access to the whole paper.
Data acquisition date : from 15 Aug 2014 to 15 Aug 2016
Data acquisition methods :
- Experimental data : Minéralogie des argiles (DRX) - isotopie du carbone et de l'oxygène (spectrométrie de masse)
Formats : application/vnd.ms-excel, image/jpeg
Audience : University: licence, University: master, Research
Spatial coverage :
- Europe: latitude between 60° N and 34° N, longitude between 11° W and 30° E
Time coverage :
- Campanien: between -84 Ma and -72 Ma
- Continental weathering as a driver of Late Cretaceous cooling: new insights from clay mineralogy of Campanian sediments from the southern Tethyan margin to the Boreal realm (doi:10.1016/j.gloplacha.2018.01.016)
Publisher : Laboratoire Biogéosciences (UMR 6282)
Record created 18 Jul 2018 by Elise Chenot.
Local identifier: FR-18008901306731-2018-07-18.