Investigation of the formation of graphite in Solakan deposit, Zanjan province using FT-IR and XRD

Document Type : Research Paper

Authors

1 Kusha Madan Consultant Engineers Co.tehran

2 School of Earth Sciences, Damghan University, Damghan-Iran

3 School of Earth Sciences, Zanjan University, zanjan -Iran

Abstract

Fluorite-barite-zinc-lead Solakan deposit is located in Sanandaj-Sirjan zone and in 125 Km of western Zanjan in the vicinity of zn-pb Anguran mine (about 500 meters). The dominant lithology of this region is consisting of amphibole schist, mica schist, graphite-bearing marble and gneiss with Precambrian age which is the oldest known unit in this region. Mineralization is occurred between the marbles (metamorphosed limestone and dolomite) in the lower part and mica schist in the upper part in the Solakan deposit. Graphite is distinguishable with an unspecified and scattered margin in all the metamorphic rocks of the region. SEM-EDX and XRD analysis confirmed occurrence of graphite in fluorite mineral in Solakan deposit. Graphite is present with regular shapes such as spherical, oral, hexagonal, cubic and in irregular shapes that generally fallow the cleavage and fractures in within fluorite. The structure of organic matter formed during the metamorphism of the Solakan-Angouran region was thoroughly investigated by FT-IR spectroscopy. Kerogen is present in all metamorphic stages with the loss of volatile matter with increasing of metamorphic degree and accumulation of carbon, graphite was formed. Based on this data, it was confirmed that the graphite inclusions in the fluorite probably display two sources with different temperatures in Solakan deposit.

Keywords

References

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History

  • Receive Date: 10 May 2017
  • Revise Date: 01 November 2017
  • Accept Date: 09 December 2017

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