Diagenetic Modifications and Reservoir Heterogeneity Associated with Magmatic Intrusions in the Devonian Khyber Limestone, Peshawar Basin, NW Pakistan

Figure 13

The average precipitation temperature versus oxygen isotopic composition of the analyzed carbonate phases. The star shows their mean values of the observed diagenetic phases. (a) The δ¹⁸O of the fluid in equilibrium with inferred values of dolomite (Dol. I, Dol. II), marble (M), and dolomitic marble (DM) was calculated using the fractionation equation of Land [69]. Meteoric water [76]. Marine water [77]. Magmatic water [78].