Abstract
In Nagpur, M.P.-Maharashtra Manganese Belt is exposed which is part of Sausar Belt. In Nagpur, four manganese mines viz Mansar, Kandri, Beldongri and Satak are selected for the ore microscopic study. These mining areas are situated in that part of Central India which are highly deformed and metamorphosed and are characterised by high grade amphibolite facies to low grade greenschist facies. The Precambrian manganese ore deposits of Nagpur are formed by the metasediments of Sausar belt which is rich in manganese sediments. The manganese ores of the study area are co-folded with distinct rock types i.e. “gondites” and predominantly composed of a mixture of braunite, bixbyite, hausmannite, hollandite, jacobsite, vredenburgite, pyrolusite, cryptomelane and psilomelane. The dominant rocks are tirodi migmatitic gneiss, argillaceous and calcareous rock types. This paper discusses the mineralogy of the manganese ores of Kandri, Mansar, Satak and Beldongri. After the careful assessment of mineralogy, texture and paragenesis of the manganese ore of the study area, it has been concluded that the manganese ores of the study area are formed by the multiple processes i.e. metamorphism and supergene enrichment. These supergene enrichments are evidence of colloidal influx. Occurrence of free braunite, free hausmannite and free jacobsite indicates the high grade metamorphism. Pyrolusite, rhodonite, and psilomelane-cryptomelane are formed by supergene enrichment. The presence of lamellar twinning in braunite indicates about shear pressure. In this area the different manganese mineral assemblages and their textures suggest about the occurrence of different metamorphic activity and depositional environment. The texture and paragenesis of manganese ore of the study area are discussed here.
Highlights
Manganese ore deposits of the study area are a part of M.P.-Maharashtra belt of Central India and this belt is encountered with Mesoproterozoic Sausar Folded Belt [1] [2]
The mineralogy of other parts of M.P.-Maharashtra manganese belt is investigated by many workers. [9]-[15] suggested that the paragenesis of manganese minerals is associated with the gondites rocks of Nagpur District
Manganese ore deposits of study area are characterised by bixbyite and jacobsite which reflect the high temperature and the low pressure condition
Summary
Manganese ore deposits of the study area are a part of M.P.-Maharashtra belt of Central India and this belt is encountered with Mesoproterozoic Sausar Folded Belt [1] [2]. In Nagpur District four manganese mines viz, Mansar, Kandri, Beldongri and Satak are selected for mineragraphic studies. Bixbyite, jacobsite, hollandite and hausmannite are observed as a predominance manganese mineral of these mines. Detailed studies of this area are described by [6] in his classic memoire and [7] carried out the mineralogy of the study area and proposed his view. Systematic mineragraphic study of manganese ore was not carried out by earlier workers. This area was investigated only with regard to their structural and geological setting. The mineralogy of other parts of M.P.-Maharashtra manganese belt is investigated by many workers. [9]-[15] suggested that the paragenesis of manganese minerals is associated with the gondites rocks of Nagpur District
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
