Fig. 13From: Fluid flow through the sedimentary cover in northern Switzerland recorded by calcite–celestite veins (Oftringen borehole, Olten)δ18O values of calcite (O’Neil et al. 1969) and aragonite (Kim et al. 2007) in equilibrium with seawater (SMOW) as a function of precipitation temperature, compared with actually measured values (temperature data are from fluid inclusion measurements, see Table 1). Whole rock carbonate data are plotted at 25°C, the average temperature for tropical seawaterBack to article page