Fold-thrust belt geometry of the Eastern Ghats Mobile Belt, a structural study from its western margin, Orissa, India

The deformation pattern of the western margin of the Eastern Ghats Mobile B elt reveals the overthrusting relationship of the mobile belt with the crat on. The mobile belt is characterised by a nappe structure consisting of the Lathore Group and Turekela Group nappes, which display distinctive litholo gical assemblages and deformational structures. While the Lathore Group nap pe is dominated by charnockitic gneisses and folded by east-west reclined f olds, the Turekela Group is khondalitic and folded along a northeast-southw est axis. The study area, therefore, resembles a fold-thrust belt. However, in view of the post-kinematic nature of thrusting to folding, it is compar able with the Caledonides fold-thrust belt. (C) 2000 Elsevier Science Limit ed. All rights reserved.