Characteristics of pegmatoidal granite exposed near Bayalan, Ajmer district, Rajasthan

The study involves the characterization of pegmatoidal granite, southeast of Beawar, Ajmer district, Rajasthan. Earlier researchers had described this granite as part of the BGC, basement to the Bhim Group of the Delhi Super Group rocks. However, the present study indicates that it is younger than the rocks of Bhim Group of South Delhi Fold Belt, into which it is intrusive. The intrusion is structurally controlled and the outcrop pattern is phacolithic. The granite had intruded post-D-2 deformation of the Delhi orogeny along the axial planes of D-2 folds. The intrusion has also resulted in the formation of a contact aureole about the calc gneisses.