Zagazig University Faculty of Science Department of Geology AN INTEGRATED STUDY OF POTENTIAL AND SEISMIC METHODS ON SOUTH SITRA AREA, WESTERN DESERT, EGYPT.
To the Department of Geology, Faculty of Science,
Supervisors Late Prof. Dr. M. A. Shabaan Prof. Dr. Ali Ali El-Khadragy Prof. Dr. Salah Shebl Saleh Dr. Mohamed Housein Saad Zagazig University Faculty of Science Department of Geology Abstract
The potential information with seismic reflection data acquisition carried out in the
South-Sitar area had been analyzed and integrated with Other geological studies to extract
information about the nature of subsurface rock distribution and to clarify its subsurface
geological configuration that probably favoring for the hydrocarbon accumulations.
To achieve this goal, several transformation techniques and various filtering processes
were accomplished through both qualitative and quantitative analyses. At first, the total
intensity aeromagnetic map was processed by the application of the reduction to the pole
technique. The main trend patterns and different tectonic forces affecting the area were
analyzed on the Bouguer and RTP maps using the directional filtering technique (sun-shade).
After that, the regional-residual separation methods were carried out through applying different
theoretical assumptions both in space domain (moving average and nine-points) and in
frequency domain (utilizing the matched filtering technique based on spectral analysis) as well
as the least-squares polynomial fitting. Other intensive and higher resolution techniques of
filtering were used for better anomaly differentiation including the first and second vertical
derivative, vertical continuation (both downward and upward), the magnitude of the horizontal
gradients (to locate boundaries) and the analytical signals transform data (to estimate depths).
All the previously filtered maps had been qualitatively described and interpreted at a proper
level and most preferable trend surfaces.
Subsurface statistical trend analysis was quantitatively obtained by applying the successive overlap technique for different filtered gravity and magnetic maps. Analysis of the detected tectonic lineaments illustrates that the area is affected by six tectonic trends namely; Tethyan (E-W), Syrian Arc (N45°-65°E), Najd (N55°-65°W), Tibesti (NE-SW), East African (N-S), and Suez (N35°-45°W) trends. These trends differ in the abundance ratio but all of them are represented for both the gravity and the magnetic maps. Furthermore, surface structural lineaments in the investigated area had been recognized and interpreted as fractures including faults. It reveals four main sets of surface fractures including the E-W, NW, ENE & NNE trending faults with a difference in the orders of predominance. These four tectonic trends seem to be rejuvenated during several orogenies throughout the geologic history of the area. Generally, the comparison between the two data sets reveals that the study area is characterized by simple geologic features
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SSAI2011: Detailed overview abstract presentations All abstracts are presented in the format: 7-min oral presentation plus 3-min discussion. Site: Abstract presentation areas A and B (near Exhibition area, lower level and Entrance) Wednesday June 15, 2011 Abstract session 1: Miscellaneous topics I Abstract area A: Chairs: Lars Rasmussen, Copenhagen, Denmark & Jan Henrik Rosland, Berge