Université de Neuchâtel

Enrichment of redox-sensitive trace metals (U, V, Mo, As) associated with the late Hauterivian Faraoni oceanic anoxic event

Bodin, Stéphane ; Godet, Alexis ; Matera, Virginie ; Steinmann, Philipp ; Vermeulen, Jean ; Gardin, Silvia ; Adatte, Thierry ; Coccioni, Rodolfo ; Föllmi, Karl B.

In: International Journal of Earth Sciences, 2007, vol. 96, no. 2, p. 327-341

The Faraoni Level is a short-lived oxygen-deficient event that took place during the latest Hauterivian. In order to improve our understanding of the palaeoenvironmental conditions that occurred during this event, we have analysed the contents of several redox-sensitive trace elements (U, V, Mo, As, Co, Cd, Cu, Zn, Ni, Pb, Cr) from bulk limestone samples of late Hauterivian–early Barremian age...

Université de Neuchâtel

Biostratigraphy, sedimentology and sequence stratigraphy of the latest Hauterivian – Early Barremian drowning episode of the Northern Tethyan margin (Altmann Member, Helvetic nappes, Switzerland)

Bodin, Stéphane ; Godet, Alexis ; Vermeulen, Jean ; Linder, Pascal ; Föllmi, Karl B.

In: Eclogae Geologicae Helvetiae, 2006, vol. 99, no. 2, p. 157-174

During the Early Cretaceous, major palaeoceanographic changes are mirrored on the northern Tethyan carbonate platform by changes in the carbonate factory and by platform drowning. The Altmann Member of the central European, northern Alpine Helvetic thrust and fold belt, contains the sedimentary record of one of these drowning events which occurred during the Late Hauterivian – Early Barremian....

Université de Neuchâtel

New data on the age of the installation of Urgonian-type carbonates along the northern Tethyan margin : biostratigraphy of the Chopf Member (Helvetic Alps, eastern Switzerland) = Données nouvelles sur la datation de l'installation des calcaires urgoniens le long de la marge nord-téthysienne : biostratigraphie du membre du Chopf (nappes Helvétiques, Suisse orientale)

Bodin, Stéphane ; Vermeulen, Jean ; Godet, Alexis ; Föllmi, Karl B.

In: Comptes Rendus Geosciences, 2006, vol. 338, no. 10, p. 727-733

The Chopf Member is a glauconitic, phosphate-bearing succession that occurs in the distal part of the Helvetic Alps (eastern Switzerland). The recent discovery of age-diagnostic ammonites within this horizon allows for its attribution to the lower part of the Gerhardtia sartousiana zone (middle Late Barremian). This new age corresponds to a maximal age for the onset of the Schrattenkalk Fm. in...

Université de Neuchâtel

The late Hauterivian Faraoni oceanic anoxic event in the western Tethys: Evidence from phosphorus burial rates

Bodin, Stéphane ; Godet, Alexis ; Föllmi, Karl B. ; Vermeulen, Jean ; Arnaud, Hubert ; Strasser, André ; Fiet, Nicolas ; Adatte, Thierry

In: Palaeogeography, Palaeoclimatology, Palaeoecology, 2006, vol. 235, p. 245-264

In the uppermost Hauterivian sediments of the western Tethys, a short-lived anoxic event (Faraoni event) is documented both in the form of an interval enriched in organic matter (pelagic realm) and in a condensed interval enriched in glauconite and phosphate (shelf realm). This latter interval represents the onset of a drowning episode on the Helvetic carbonate platform along the northern tethyan...

Université de Neuchâtel

Evolution of the marine stable carbon-isotope record during the early Cretaceous : A focus on the late Hauterivian and Barremian in the Tethyan realm

Godet, Alexis ; Bodin, Stéphane ; Föllmi, Karl B. ; Vermeulen, Jean ; Gardin, Silvia ; Fiet, Nicolas ; Adatte, Thierry ; Berner, Zsolt ; Stüben, Doris ; Van de Schootbrugge, Bas

In: Earth and Planetary Science Letters, 2006, vol. 242, p. 254-271

In order to improve our understanding of the relationships between the late Hauterivian oceanic anoxic Faraoni event, contemporaneous platform drowning along the northern Tethyan margin and global environmental change in general, we established high-resolution δ13C and δ18O curves for the late Hauterivian and the entire Barremian stage. These data were obtained from whole-rock carbonate samples...