Université de Fribourg

Molybdenum isotopic composition of modern and Carboniferous carbonates

Voegelin, Andrea R. ; Nägler, Thomas F. ; Samankassou, Elias ; Villa, Igor M.

In: Chemical Geology, 2009, vol. 265, no. 3-4, p. 488-498

We investigate the redox-sensitive isotope system of molybdenum (Mo) in marine carbonates to evaluate their potential as archive of the Mo isotopic composition of coeval seawater. We present Mo isotope data (δ98/95Mo) of modern skeletal and non-skeletal carbonates as well as a variety of precipitates from the mid and late Carboniferous. The external reproducibility is...

Université de Fribourg

Quantification of high-frequency sea-level fluctuations in shallow-water carbonates: an example from the Berriasian–Valanginian (French Jura)

Hillgärtner, Heiko ; Strasser, André

In: Palaeogeography, Palaeoclimatology, Palaeoecology, 2003, vol. 200(1-4), p. 43

When quantifying sedimentary processes on shallow carbonate platforms, it is important to know the high-frequency accommodation changes through time. Accommodation changes in cyclic successions are often analysed by simply converting cycle thickness to Fischer plots. This approach is not satisfactory, because it does not account for differential compaction, possible erosion, sea-level fall below...