• Ore-microscopic studies of the manganese ore-minerals of old M.P. - I. Dongribuzurg, Bhandara District

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      https://www.ias.ac.in/article/fulltext/seca/049/03/0165-0173

    • Keywords

       

      Hematite; Concentric Layer; Pyrolusite; Manganese Mineral; Shrinkage Crack

    • Abstract

       

      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.

    • Author Affiliations

       

      S P Deshpande1

      1. University Department of Geology, Nagpur
    • Dates

       
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