Mineralogy, petrology, and geochemistry of the Zarshlo manganese deposit, Miyaneh, northwest Iran

Document Type : Original Article

Authors

1 Faculty of Industrial Design, Tabriz Islamic Art University, Iran

2 Department of Geology, University of Tabriz, Tabriz 51664, Iran

3 Research Center for Conservation of Culture Relics (RCCCR), Research Institute of Cultural Heritage & Tourism, Tehran, Iran

4 Department of Geology, Payame Noor University

Abstract

The Zarshloo manganese deposit is situated approximately 40 kilometers southwest of Mianeh city, in the northwestern part of Azerbaijan Province, Iran. This region is tectonically located within the Alborz-Azerbaijan zone. The dominant lithology in the area consists of Oligocene-Miocene volcanic rocks, predominantly basaltic andesites and ignimbrites. These volcanic rocks exhibit a porphyritic to microlitic porphyritic texture, with phenocrysts of plagioclase, hornblende, pyroxene, and olivine. The principal ore minerals are pyrolusite and manganite, accompanied by minor barite, silica, and calcite. A variety of textures, including cauliflower, kidney, dendritic, concentric banding, and pisolitic growth, are observed in this deposit. The Zarshloo deposit is hosted within a fault-shear zone and is primarily confined to basaltic andesite. The main manganese orebody strikes north-south and extends for approximately 150 meters. The rocks in the area exhibit significant shearing. The ore mineral occurs as irregular veins with a nearly vertical dip, and is readily visible due to its hardness and resistance to weathering. Geochemical evidence suggests that the manganese mineralization is related to hydrothermal fluids, forming as massive and fracture-filling veins with kidney and cauliflower textures. The average grade of manganese in the Zarshloo ore is 48%.
 

Keywords

References

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History

  • Receive Date: 23 October 2024
  • Revise Date: 10 December 2024
  • Accept Date: 21 December 2024

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