2D RAY-TRACING AND SEISMIC VELOCITY STRUCTURE MODELING WITHIN specific AREA OF THE NILE DELTA, EGYPT
M. M. Attia(1) and A. M. Abudeif (1)
(Received 22 January 2004;
accepted 14 September 2004)
(1)Geology Department, Faculty of Science, South Valley
University, Sohag 82524, Egypt. (Email: abdo_m_abudeif@hotmail.com)
Abstract:The purpose
of this investigation was to obtain information about the nature of the
shallow sedimentary layers of the Quaternary depositional styles in the Nile
Delta by using new processing techniques. Seven reversed shallow seismic
refraction profiles conducted by Essawy (2001) in the northern part of Egypt,
as a part of the Nile Delta were re-interpreted. New analysis of these
refraction profiles using travel time tomography methods and 2D ray-tracing
modeling reveals that the area consists of homogeneous layers. A 3D model has
been constructed to describe the shape of the layer boundaries and the
presence of an anomaly representing buried archaeological relics below the
ground surface. The distributions of P-wave velocity of these layers
concordant with their thickness are much similar to the Quaternary Nile
Valley layers. |