Sb-As vein mineralization of Kuh-e-Shuru area, southern Ferdows: Evidence of alteration, mineralogy, geochemistry and fluid inclusion study

Document Type : Original Article

Authors

Abstract

Kuh-e-Shuru prospect area is located in the southern Ferdows, South Khorasan Province, and is one of the vein-type mineralization, related to the Tertiary magmatic activities of Lut block. Mineralization, as epigenetic, is formed in host rocks of shale-siltstone (Jurassic), dacite, and diorite porphyry (Tertiary). Mineralization with open space filling, breccia, and replacment textures is formed in fault zones and can be divided into two main stage including: 1. Quartz-galena-pyrite-realgare with argillic-sericitic alteration and 2. Quartz-stibnite-pyrite-realgar with silicified alteration. Maximum geochemical anomalies in veins are for antimony with 14%, lead 293 ppm, arcenic 98 ppm, and zinc 168 ppm. Microthermometric measurements show quartz-sulfide veins are formed from a fluid with temperature of 160 to 224ºC and salinity of 13.7 to 22.8 NaCl wt. % equivalent. The mixing of hot and brine magmatic ore fluid with cold and low salinity meteoric fluid and boiling can be casued metal deposition. Based on geological studies, mineralogy, texture and structure, geochemistry, and fluid inclusion data, Kuh-e-Shuru prospect area can be classified as epithermal deposits.

Keywords

References

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Iranian Journal of Crystallography and Mineralogy
Volume 28, Issue 4 - Serial Number 80
December 2020
Pages 869-882

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  • Receive Date: 09 December 2019
  • Revise Date: 23 January 2020
  • Accept Date: 11 March 2020

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