Mineralization and Formation of the Khan-e Sourmeh Pb-Zn Deposit (West of Isfahan) Based on Mineralogy, Geochemistry and Fluid Inclusion Evidences.

Authors

1 Department of Geology, Kharazmi University of Tehran

2 School of Geology, University College of Science, University of Tehran

Abstract

 The Khan-e Sourmeh Pb-Zn deposit is located in 40 Km west of Isfahan, in the lower Cretaceous carbonate rocks. Hypogene minerals include galena, sphalerite, pyrite, tennantite, chalcopyrite, and supergene minerals are cerrusite, angelsite, covelite and malachite.Geochemical studies indicate that main source of  the metals was the lower Cretaceous carbonate layer with contribution from the upper Triassic shale. Microthermometry studies, indicate homogenization temperature of 210o to 240 oC and salinity of 7 to 8 wt% NaCl equivalent. Considering types of host rock, hypogene and supergene minerals, salinity and homogenization temperature of fluid inclusions, the khan-e Sourmeh Pb-Zn deposit is similar to MVT deposits with carbonate host rock. In Khan-e Sourmeh deposit, hydrothermal fluids after leaching the metals from Triassic shale layers and Cretaceous carbonate sequences, ascended through deep faults and mixed with connate and meteoric waters causing Pb-Zn deposition in fault zones. The result of this study help to find Pb-Zn minerals occurrence in lower depth of mine.
 

Keywords

References

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