An Integrated Approach To Evaluate Sub-Surface Ramp Geometries And Their Behaviour In Npdz, Potwar Basin, Pakistan

Abstract

North Potwar Deformed Zone (NPDZ) makes up the northern region of the Potwar Plateau in Pakistan. The area is bounded to the north by the Main Boundary Thrust (MBT), and to the south by Soan Syncline. Geological map of the study area illustrates the spatial distribution of rock units and geological structures throughout the area. Several seismic sections were interpreted to understand the subsurface geometry of the Khairi Murat Fault as the surface exposure of the rocks is not adequate to understand the subsurface structures.. The Khairi Murat Thrust is the forward breaking expression of the Main Boundary Thrust, marking the southern leading-edge of the NPDZ. Therefore, the MBT and KMF are interconnected in the subsurface, and are not two separate thrust sheets branching upwards from a Precambrian evaporite basal decollement at 10 km depth. The integrated geological and seismic data confirms the ramp-flat geometry of the Khairi Murat Thrust in the subsurface.