The Ab-Bagh Stratiform and Stratabound Zn-Pb Deposit, Sanandaj-Sirjan Zone, Iran

The Ab-Bagh Zn-Pb deposit is located in the southeastern part of the Malayer-Esfahan metallogenic belt, south of Shahreza, Iran, and is hosted by a sequence of Late Jurassic-Early Cretaceous detrital-carbonate rocks belonging to the Sanandaj-Sirjan structural zone (SSZ). Based on relationships between ore and host rocks, mineralogical associations and ore textures and facies, two different ore zones can be distinguished: 1) a stratiform to stratabound sulphide mineralization, namely the Lower Ore Zone, in the Late Jurassic-Early Cretaceous detrital-carbonate rocks that display three different ore facies (stockwork, massive and bedded ores) and 2) a stratabound sulphide mineralization, namely the Upper Ore Zone in the Early Cretaceous carbonates. The main sulphide minerals of the Lower Ore Zone are sphalerite, Ag-rich galena, pyrite and chalcopyrite, associated with a gangue of quartz and calcite. Conversely, the Upper Ore Zone only display network of veins, filled by galena and calcite. Based on difference of textural, mineralogical and geochemical features of the two ore zones, the Ab-Bagh deposit is clearly different from the other Zn-Pb deposits in the Malayer-Esfahan metallogenic belt of Iran.