Université de Neuchâtel

Phosphorus and the roles of productivity and nutrient recycling during oceanic anoxic event 2

Mort, Haydon P. ; Adatte, Thierry ; Föllmi, Karl B. ; Keller, Gerta ; Steinmann, Philipp ; Matera, Virginie ; Berner, Zsolt ; Stüben, Doris

In: Geology, 2007, vol. 35, no. 6, p. 483-486

Four sections documenting the impact of the late Cenomanian oceanic anoxic event (OAE 2) were studied in basins with different paleoenvironmental regimes. Accumulation rates of phosphorus (P) bound to iron, organic matter, and authigenic phosphate are shown to rise and arrive at a distinct maximum at the onset of OAE 2, with an associated increase in δ13C values. Accumulation rates of...

Université de Neuchâtel

The Cenomanian/Turonian anoxic event at the Bonarelli Level in Italy and Spain: enhanced productivity and/or better preservation?

Mort, Haydon ; Jacquat, Olivier ; Adatte, Thierry ; Steinmann, Philip ; Föllmi, Karl B. ; Matera, Virginie ; Berner, Zsolt ; Stüben, Doris

In: Cretaceous Research, 2007, vol. 28, no. 4, p. 597-612

The upper Cenomanian pelagic sediments of Furlo in the northern Apennines, Italy, are characterized by a 1.5-m-thick organic-rich stratigraphic horizon called the Bonarelli Level, which represents the second major oceanic anoxic event in the Cretaceous (OAE 2). The Bonarelli Level is depleted in carbonates and consists essentially of biogenic quartz, phyllosilicates, and organic matter, with...

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...