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Ore-microscopic studies of the manganese ore-minerals of old M.P.

I. Dongribuzurg, Bhandara District

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Summary

The paper gives an account of the ore-microscopic study of the manganese ore-minerals collected from Dongribuzurg, Bhandara District, Old M.P. The following are the ore-minerals that have been identified in polished sections: Psilomelane, Pyrolusite, Polianite and Braunite. The characters of these ore-minerals under reflected light are given along with their etch reactions and reflectivity values. In addition, a mineral showing properties different from those shown by any known manganese ore-mineral has been described. The identity of this mineral could only be established on chemical and X-ray studies which are now in progress. Interesting microstructures, like the colloform texture shown by Psilomelane, have been fully described, and the mineral paragenesis based on textural features is given. A note has been added on the origin of Pyrolusite, since the occurrence of large quantities of this mineral in association with highly metamorphosed rocks is curious and interesting.

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References

  • Bastin, E. S.Interpretation of Ore Textures, 1950, 20–32.

  • Dunn, J. A. “A study of some microscopical aspects of Indian manganese ores,”Trans. Nat. Inst. Sciences, India, 1936,2 (7).

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  • Karkare, B. S. “Geology and petrology of the Chikhla and Dongribuzurg area (M.P.),”Dissertation submitted to the Nagpur University, 1953.

  • Short, M.N. “Microscopic determination of ore-minerals,”U.S. Dept. of Interior, Geological Survey, Bull. 814, 1940.

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Authors and Affiliations

  1. University Department of Geology, Nagpur

    S. P. Deshpande

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  1. S. P. Deshpande
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(Communicated by Prof. Sripadrao Kilpady,f.a.sc.)

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Deshpande, S.P. Ore-microscopic studies of the manganese ore-minerals of old M.P.. Proc. Indian Acad. Sci. 49, 165–173 (1959). https://doi.org/10.1007/BF03052882

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  • DOI: https://doi.org/10.1007/BF03052882

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