1981•Journal of the Geological Society of IndiaRequires access

Mafic and Ultramafic Volcanism of Ongarbira Greenstone Belt, Singhbhum, Bihar

Anupendu Gupta, Aniruddha Basu, Deepak C. Srivastava

Abstract

The 'Ongarbira Traps' within the Archean Iron-Ore Group metasediments in Singhbhum is characterised by the presence of mafic-ultramafic lavas, gabbro-pyroxenite with subordinate tuffaceous derivatives. The occurrence of pillow structures, intricate interlayering with sediments and association of cherts indicate subaqueous eruptive environment.

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Key concepts: Greenstone belt, Mafic, Ultramafic rock, Archean, Geology, Geochemistry, Gabbro, Pillow lava