The Gonditic Rocks of Manbazar, Purulia District West Bengal

The presence of a Gonditic rock unit is reported from Manbazar, Purulia district, West Bengal. It occurs as a distinct band cofolded with the associated metapelites into an isoclinal antiform followed to the west by a complimentary synform with granitic rocks occupying the antiformal core. The metasediments including the gonditic unit were metamorphosed under Upper Greenschist Facies conditions of regional metamorphism. Mineralogically it is composed mainly of quartz, spessartite, piedmontite, braunite, magnetite, specularite and ilmenite. The minerology and textural relationships indicate moderately high temperature and high oxygen fugacity under which the original sediments were metamorphosed.