Tectonic Investigation In Relation To Gravity Anomalies In Northeastern Smai, Egypt

Abstract

The purpose of this work is to solve problems of tectonics investi- gations making use of the relatively cheap gravity survey. This is pre- ferred to the costly seismic survey which have failed in such detections specially in areas of complex structural history. (Linsser 1967 p. 480, P. 485 Paragraph 1-4). Computer programs used to determine the depth at which faults had acted as well as their throws. The structural pictures at the base- ment surface have been selected seperately at both the 15,000 and 1,000 feet depths. Two selected tectonics maps have been constructed by transforming the available Bouguer gravity data the first at Z=15,000 feet and the second at 1,000 feet. They show the following characters; i) Longer ex- tension of the tectonic elements; ii) Greatly displaced blocks, reaching 1170 mts (about 3840 feet); iii) Hinge faults; iv) Predominantly NW- SE direction and less pronounced NE - SW direction of the tectonic elements.