Volcanological Aspects of Jungel Metavolcanic Suite, Bijawar Greenstone Belt, Central India: Suspect Ancient Island-Arc Volcanism

Spectacular array of volcanic structures shown by Jungel metavolcanics include pillow structures, pahoehoe flows and toes, groove lava and shark tooth projections. Some of these features are indicative of small volume phreato-magmatic eruptions under shallow water conditions. The style of igneous activity is inferred to be moderately explosive, fragmental and spasmodic, supported by substantial. amount of volatiles. Based on volcanological, geochemical and tectonic evidences it is suggested that the present volcanic rocks were erupted in island-arc environment and that the southern margin of the Bundelkhand protocontinent formed a zone of subduction.