Analysis of Aeromagnetic Data Over Part of Bundelkhand Granite Complex for Geology and Structure

The interpretation of aeromagnetic data over Bundelkhand Granite Complex (BGC) in parts of Lalitpur District (U P), Sagar and Chhatarpur Districts (M P) has revealed the structural patterns such as the boundaries of various geological formations, magnetic body axes, depth extents of intrusives and thickness of various litho-Units which may be of help in mineral exploration. The aeromagnetic features were found to correspond well with various geological formations like Bijawars, Vindhyans, Deccan Traps and BGC. The average depths of magnetic interfaces were estimated to be at 71 km, 19 km and 0 47 km from the observation plane (625 m above m s 1). The thickness of Deccan Traps was estimated to be of the order of 0 47 km from the plane of observation. The ferrugenous bodies in Bijawars and intrusive bodies in BGC were found to disappear at the magnetic interface at 19 km from the observation plane. The Bijawars were found to be thickened gradually towards west of Didonia up to the deeper interface at 71 km from observation plane probably due to the presence of schistose rocks and basic/Ultrabasic intrusives at depth. The study of matched filtered maps indicated that Vindhyans continue beyond the interface of 19 km at places. The 3-D prism modeling results indicated that the depth extents of most of the bodies are found to be in-Between the two interfaces at 0 47 km and 1 9 km and some bodies continued even deeper. The area towards north and northeast of Sonrai has been recommended as having potential for base-Metal mineral prospecting.