The intramolecular kinetic oxygen isotope fractionation between CO2 and CO32- during reaction of phosphoric acid with natural smithsonite (ZnCO3) and cerussite (PbCO3) has been determined between 25 and 72°C. While cerussite ...
The Ca isotope variation of 11 Miocene and Pleistocene, authigenic, marine phosphates is rather small compared to the corresponding variation in δ18O values. The δ44Ca values are not correlated with the δ18O values and, ...