Metavolcanic and metasedimentary inclusions in the Bundelkhand Granitic Complex in Tikamgarh district, Madhya Pradesh

The Bundelkhand Granitic Complex of central India contains inclusions of Ar chaean volcanic and sedimentary rocks and orthogneisses, some of which are 15 km by 6 km in size. Earlier workers considered that these inclusions bel ong to two distinct lithostratigraphic formations separated in time by a mi gmatization event. Our new data suggest that the migmatization event post-d ated all of the volcanic and sedimentary rocks and hence the two- fold stra tigraphic subdivision is not viable. Further, intrusion of orthogneisses re sulted in an increase in grade of metamorphism in some volcanic and sedimen tary rocks specifically near the contact.