Geophysical Delineation of Surface Trace of the Main Boundary Thrust, near Taxila

Abstract

 Main boundary thrust is the major tectonic feature in the north of IslamabadlRawalpindi and crosses G.T. road near Nicholson Monument. Along this fault the Margala Hill limestone is thrusted over the sandstone of Murree Formation. For searching the location of the surface trace of the fault which is buried under the alluvium, electrical resistivity technique was applied using Wenner and Schlumberger configurations. The interpretation of vertical and horizontal resistivity profiling along G.T. road on both sides of Nicholson Monument, suggests that the surface trace of the fault may be about 590 meters south of Nicholson-Monument.