The purpose of the current paper is to investigate the subsurface geological active structures, through the analysis of the magnetic data, to conduct a scientific evaluation of the infrastructure of the area surrounding the new port of Jarjob that located on the northern coast about 60 km from the city of Marsa Matruh towards the city of Salloum and sited in the vicinity of the proposed area. The Magnetic data comprise the RTP aeromagnetic map as well as the resulting map from the geomagnetic survey for the part that was chosen in the proposed area. Two Overhauser Magnetometers are used to make a detailed comprehensive land magnetic survey, while the aeromagnetic map is obtained with authorisation from the General Petroleum Company. The necessary reduction-filtering phases like the daily variation, regional gradient, and the time variation are applied to obtain the total intensity anomaly map. Resulting total land magnetic intensity map is then reduced to the north magnetic pole and followed by the application of filtering linear wavelength technique to RTP aeromagnetic map and RTP land magnetic map to isolated the shallower residual components using different grid intervals. The obtained major tectonic trends of the study area show that the regional structures are controlled by the regional deeper structure taken NE-SW and E-W directions. The average calculated depth to the basement surface ranges from 2.6 to 3.2 km. So, the strength and solidity of the infrastructure of the port area, especially land magnetic survey area being studied that occupies a privileged place, which overlooks directly on the port coast and close to the main building, makes it a candidate for the establishment of industrial and economic projects and logistical services in the port.

Integrated rock magnetic, palaeomagnetic and magnetic fabric studies have been carried out, in order to rely a better understanding of the age and origin of the Bahariya iron ores. A total of 80 oriented block samples were collected from 10 sites covering the three iron mining areas at Bahariya Oasis (El Gedida, Ghorabi and El Harra) within an area located between latitudes (28° 24` to 28° 29`N) and longitudes (29° 02` to 29° 11`E). Rock magnetic measurements reveal that, the main magnetic carrier is the haematite. Goethite and pyrrhotite, that are also present as subordinate constituents in the studied samples. Careful thermal demagnetization successfully enabled the isolation of the characteristic remanent magnetization of primary origin, which yields a magnetic position at Lat. 75.3º N and Long. 137.9º E revealing that, both the ore and host rocks are of the same age. Magnetic fabric studies on these ores indicated that, they are still holding their primary Fabrics of sedimentary origin.

Several exposures of basaltic intrusions are distributed near Red Sea coast at Wadi Hodein Southern Egypt. There is some disagreement about the palaeomagnetic pole results of these basalts; some claim it is Tertiary in age, while others claim it is of Cretaceous age. To our knowledge, no Anisotropy of Magnetic Susceptibility (AMS) results have ever been published from these rocks. Therefore, palaeomagnetic and AMS studies were performed on these basalts in order to identify phases of magmatism, paleomagnetic pole position and types of magmatic intrusions. In the present study, eight sites (219 oriented core specimens) were sampled from eight location. Rock magnetic studies reflect the presence of magnetite as the chief mineral in these rocks. Alternating field technique in association with Thermal Demagnetisation process revealed presence of one magmatic phase took place in Cretaceous age with VGP (65°N, 250°E; A₉₅ = 5.3). AMS results showed that the basaltic intrusions in the study area are still holding their primary fabrics.