Using Source Parameter Imaging Technique to the Aeromagnetic Data to Estimate the Basement Depth of Tharthar Lake and Surrounding Area in Central Iraq

Abstract

This research aims to determine the depth of basement rock at Tharthar Lake and its surroundings. The magnetic data were utilized to determine basement depth using the Source Parameter Imaging and the Half-width methods. Using the GeoSoft-Oasis Montaj software version 8.4 application, the total magnetic intensity of the area was converted to the Reduction to Pole, then the Source Parameter Imaging was calculated. Three grids (dx, dy, and dz) were obtained. These grids then are used as input grids for Source Parameter Imaging computations. The resulting Source Parameter Imaging depth map reveals a minimum basement depth of 6 km and a maximum basement depth of 12 km. The basement depth map shows the main basin trending NW-SE from northwest Tharthar Lake to south Falluja City. The basement depth results were compared with the previous information about basement depth in the studied area, and a good result was obtained with the C.G.G. 1974 basement depth map.