• DOI:10.1007/BF00371403
Corpus ID: 129495326

Geochemistry of braunite and associated phases in metamorphosed non-calcareous manganese ores of India

@article{Bhattacharyya1984GeochemistryOB,
  title={Geochemistry of braunite and associated phases in metamorphosed non-calcareous manganese ores of India},
  author={P. Bhattacharyya and S. Dasgupta and M. Fukuoka and Supriya Roy},
  journal={Contributions to Mineralogy and Petrology},
  year={1984},
  volume={87},
  pages={65-71}
}

• P. Bhattacharyya, S. Dasgupta, +1 author Supriya Roy
• Published 1984
• Geology
• Contributions to Mineralogy and Petrology

In the metamorphosed manganese oxide ores of India, braunite is ubiquitous in all assemblages from chlorite to sillimanite grades. Chemical analyses of braunite from different prograde assemblages confirm the presence of a fixed R2+ (=Mn2++Mg+Ca) SiO3 molecule in the mineral. Element partitioning between coexisting braunite and bixbyite indicates a near-ideal mixing of Fe+3/ -Mn+3 in the phases. This also indicates that braunite became relatively ferrian while equilibrating with associated… Expand

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