*Tamer Mahmoud Ragab Farag^1,2, Hideki Mizunaga¹, Mohamed Sobh³ (1.Exploration Geophysics lab., Department of Earth Resources Engineering, Graduate School of Engineering, Kyushu University, 2.Exploration Sector, Nuclear Materials Authority, Egypt, 3.Institute of Geophysics and Geoinformatics, TU Bergakademie Freiberg, Germany)