Deduction of tectonic structure of North and Central Sinai from aeromagnetic and Bouguer anomaly maps

Abstract

The aim of the present work is to deduce the tectonic structure of the area and to show the role of the separation methods in the resolution of the multisource of magnetic and gravity implications. The aeromagnetic total intensity map was transformed to the reduced pole aeromagnetic map (RTP). This step was followed by linear wavelength filtering of the RTP aeromagnetic map, and of the Bouguer anomaly map, in order to isolate shallower residual components using different grid intervals. A comparative analysis was carried out for the different filtered RTP aeromagnetic and gravity maps. Statistical trend analysis was applied for the magnetic and gravity data. The study revealed that the area has been affected by three significant tectonic trends, namely; NE-SW, NW-SE and E-W. The RTP aeromagnetic map and Bouguer anomaly maps provided detailed data for 2d modeling of the source. The magnetic and gravity cross section indicates possible sources of the observed anomalies. Only depth of the anomaly sources (mostly in the basement) were determined from magnetic and gravity data to reveal a tectonic zone and structure which leads to a fluid migration. The result of depth estimation to the basement complex revealed that the depth of the basement ranges between 3.2 km and 4.3 km.