الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The study area lies between longitudes 33o 00’, 34o 20’ E and latitudes 30o 30’, 31o 15’ N at the most northeastern part of Sinai. The aim of study is to detect the structural elements controlling the area and evaluate the distribution and the thickness of the sedimentary cover, which may have an important role in hydrocarbon explorations. Therefore, gravity and magnetic data of the area gathered and analyzed by different suitable techniques. The total intensity magnetic map processed by the application of the reduction to the pole (RTP) technique in order to correlate the magnetic anomalies position to its sources locations. Bouguer gravity and RTP magnetic maps subjected to maximum horizontal gradient technique to delineate the faults locations, lengths and trend of faults. The observed potential fields consisted of regional and residual components related to deep and shallow source bodies, respectively. Regional-Residual separation was calculated for both Bouguer gravity and RTP magnetic maps using different techniques such as; Griffin’s, Nine Point, Second Vertical Derivative, Least squares polynomial, Fast Fourier Transform filtering methods. In addition, there is high correlation between the anomalies of the separated maps using different separation techniques in both gravity and magnetic maps, which helps us making high-resolution image of the subsurface structural features. The depth to source bodies of the anomalies in the study area estimated using different methods such as straight slope, Peterיs, half width and tangent methods, in addition to spectral analysis technique. All these techniques applied on Bouguer gravity map. While, only spectral analysis methods applied on RTP magnetic map. Moreover, Source Parameter Imaging method applied on magnetic map shows similar results in comparison with applied traditional and spectral methods. Euler’s deconvolution (ED) approach used for locating the fault edges and/or contacts positions and their approximate depths of the study area for both the gravity and RTP magnetic maps. In addition, Tilt angle derivative method applied on both the Bouguer and the magnetic maps. Moreover, plotting Euler solutions on Tilt angle derivative maps shows a good fitting between the solutions and the zero lines of Tilt angle maps. Integrating of all the results extracted from separation techniques supported with Euler’s deconvolution and Tilt angle methods results as well as depth estimation results make it possible to construct a reasonable and more reliable tentative basement structure map. This map reveals mainly the basement surface as an alternated pattern of uplifted and down-faulted basement blocks. 2-D modelling profiles constructed using two coupled gravity and magnetic data trending in NW and NNW directions. The two models comprises the upper most part of the crust in addition to the sedimentary cover. Both of the models show dipping of the basement toward the north direction. The upper most crustal part shows a group of normal faults with different throws and orientations, which make a sequence of alternated horst /grabben faulted block structures. Combined model of gravity-seismic profile along seismic line also is constructed in order to get more accurate subsurface structure. The interpreted seismic section displays the subsurface structural configuration within the study area. Close investigation of this section shows that the area is affected by two normal faults. The constructed model indicate that the general dip regime of the area is in the North direction toward Levantine Basin. A map of the promising sites in the area revealed six zones of optimal subsurface situation for hydrocarbon accumulation, as well as thick sedimentary covers (ranges from 4.0 to 7.5 Km). In addition to further exploration work, deep drilling recommended in these promising sites.