Abstract Research is conducted to investigate whether or not, apart from the Chodarchay deposit, ... more Abstract Research is conducted to investigate whether or not, apart from the Chodarchay deposit, there are other examples of porphyry-type mineralization associated with epithermal deposits in the Tarom metallogenic belt of the Alborz zone, NW Iran. Homogenization temperature, final ice-melting, and salinity values are determined for fluid inclusions in mostly quartz and partly calcite, fluorite, sphalerite, and barite samples from eight epithermal ore deposits to unravel the enigma on porphyry-type mineralization in Tarom. The homogenization temperatures and salinities of the fluid inclusions range from 82 to 520 °C and 0.2 to 37 wt% NaCl equiv., respectively. The fluid inclusions show varying densities from 0.4 to ~1.2 g/cm3 with most values between 0.7 and 0.95 g/cm3. Tarom epithermal deposits in order of maximum mineralization depth are Chargar (520 m), Zajkan (640 m), Goloujeh (770 m), Lohneh (1075 m), Nikoueieh (1150 m), Khalifelou (1500 m), Aghkand (1690 m), and Chodarchay (1900 m). It seems that magmatic water played an important role in the Tarom epithermal deposits except for Chargar where mixing magmatic and meteoric waters is considered as the main mechanism for ore deposition. The physicochemical variations suggest differences among epithermal deposits in the Tarom district. Chodarchay, Lohneh, Khalifelou, and Goloujeh have some fluid inclusion features of porphyry mineralization associated with an epithermal part. Minerals from Tarom contain fluid inclusions indicative of porphyry mineralization beneath some intermediate- and high-sulfidation epithermal deposits. The findings of this study are instrumental in the exploration of deeper porphyry parts of the Tarom epithermal deposits.
Abstract Research is conducted to investigate whether or not, apart from the Chodarchay deposit, ... more Abstract Research is conducted to investigate whether or not, apart from the Chodarchay deposit, there are other examples of porphyry-type mineralization associated with epithermal deposits in the Tarom metallogenic belt of the Alborz zone, NW Iran. Homogenization temperature, final ice-melting, and salinity values are determined for fluid inclusions in mostly quartz and partly calcite, fluorite, sphalerite, and barite samples from eight epithermal ore deposits to unravel the enigma on porphyry-type mineralization in Tarom. The homogenization temperatures and salinities of the fluid inclusions range from 82 to 520 °C and 0.2 to 37 wt% NaCl equiv., respectively. The fluid inclusions show varying densities from 0.4 to ~1.2 g/cm3 with most values between 0.7 and 0.95 g/cm3. Tarom epithermal deposits in order of maximum mineralization depth are Chargar (520 m), Zajkan (640 m), Goloujeh (770 m), Lohneh (1075 m), Nikoueieh (1150 m), Khalifelou (1500 m), Aghkand (1690 m), and Chodarchay (1900 m). It seems that magmatic water played an important role in the Tarom epithermal deposits except for Chargar where mixing magmatic and meteoric waters is considered as the main mechanism for ore deposition. The physicochemical variations suggest differences among epithermal deposits in the Tarom district. Chodarchay, Lohneh, Khalifelou, and Goloujeh have some fluid inclusion features of porphyry mineralization associated with an epithermal part. Minerals from Tarom contain fluid inclusions indicative of porphyry mineralization beneath some intermediate- and high-sulfidation epithermal deposits. The findings of this study are instrumental in the exploration of deeper porphyry parts of the Tarom epithermal deposits.
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