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As a critical and strategic metal, Cobalt (Co) is in increasing demand due to the global transition to renewable energy, playing a pivotal metal in driving this transition. The rising demand for EVs and production of wind power turbines has created an urgent need to explore new Co resources. In India, Belligutti hill, situated near Kalyadi village within the Kalyadi Schist belt (KSB) of the western Dharwar craton, Karnataka, is well known for significant copper production in the past and previous studies have reported the presence of significant Co. The economic potential of Co in the KSB was investigated through detailed petrographic study, EPMA, Raman spectroscopy and ICP-MS using the samples collected from Kalyadi mine dumps and tailings. Petrography studies revealed the presence of sulfide bearing phases, predominantly pyrite and chalcopyrite, which occurs along the foliation and also associated with the quartz-carbonate veins. The EPMA results reveals two different occurrences of Co i.e., independent Co mineral and isomorphous substitution of Co in pyrite. An independent Co mineral is identified to be siegenite based on its EPMA analysis and characteristics spectral peak in Raman spectroscopy. ICP-MS analysis of separated sulfide concentrates from mine tailings revealed a significant cobalt (Co) content of up to 1.12 wt%. These results indicate significant Co potential in the KSB.

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Economic Potential of Cobalt from Kalyadi Copper–Cobalt Deposit, Dharwar Craton, India

  • 会议论文

  • 发表日期：

    2026年

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  • Pratush Kar,
  • Abir Banerjee,
  • Sakthi Saravanan Chinnasamy,
  • V. N. Vasudev,
  • Prabhakar Sangurmath

摘要

As a critical and strategic metal, Cobalt (Co) is in increasing demand due to the global transition to renewable energy, playing a pivotal metal in driving this transition. The rising demand for EVs and production of wind power turbines has created an urgent need to explore new Co resources. In India, Belligutti hill, situated near Kalyadi village within the Kalyadi Schist belt (KSB) of the western Dharwar craton, Karnataka, is well known for significant copper production in the past and previous studies have reported the presence of significant Co. The economic potential of Co in the KSB was investigated through detailed petrographic study, EPMA, Raman spectroscopy and ICP-MS using the samples collected from Kalyadi mine dumps and tailings. Petrography studies revealed the presence of sulfide bearing phases, predominantly pyrite and chalcopyrite, which occurs along the foliation and also associated with the quartz-carbonate veins. The EPMA results reveals two different occurrences of Co i.e., independent Co mineral and isomorphous substitution of Co in pyrite. An independent Co mineral is identified to be siegenite based on its EPMA analysis and characteristics spectral peak in Raman spectroscopy. ICP-MS analysis of separated sulfide concentrates from mine tailings revealed a significant cobalt (Co) content of up to 1.12 wt%. These results indicate significant Co potential in the KSB.