Self- Potential Investigation for Near-Surface Depression Delineation in Seikanian Kirkuk, Iraq

Abstract

Seikanian is a new suburban in Kirkuk city rich in many environmental problems, it encloses different topographic features such as depressions and open holes which are obstacles for future civilian development. Geophysical surface self-potential method is applied to delineate the location and dimension of the depression. Three survey lines, gradient, total field and gradient-profiling are chosen and taken for recording the SP measurements in addition 18 grid points spread around the open hole. The acquired data is rendered into curves and contour maps. The interpreted gradient, total field and gradient-profiling surveyed SP line curves revealed a clear anomaly which indicate the location of the depression structure, the SP observed, residual and first order horizontal derivative contour maps delineate the boundaries of the depression. The depth of depression is between 1.8-3.3 m.