Ferroan and non-ferroan calcites occur in fractures in the Lower Carboniferous of the Variscan foreland of southern Belgium. These fractures post-date the Variscan orogeny and the calcites have a telogenetic origin. The non-ferroan calcites formed by recrystallization of the ferroan calcites. Two types of monophase aqueous fluid inclusions are present in the ferroan calcite cement. Although both types of inclusions formed at a temperature not exceeding 50 degrees C, one type contains a moderately saline fluid (3.6-16.3 eq. wt.% NaCl) and the other type fresh water (Tm ice = 0 degrees C). The fluid inclusions in the non-ferroan calcite also contain fresh water.