Radiometric Lithologic Interpretation of Aerial Radio spectrometric False Colour Image Maps, Eastern Desert, Egypt PDF

Keywords

Rock formations, Un Rabul, Egypt, geology, map, radiometric, lithologic, interpretation

Abstract

The area studied, Gabal Um-Rabul, is located in the northern part of the Eastern Desert of Egypt. It is covered by different varieties of rock formations, including successions of basement and sedimentary rocks. The contact zone between them is considered as an unconformity contact. The area under consideration was included in an airborne gamma-ray spectrometric survey which was conducted by the Aero-Service Division, Western Geophysical Company of America in 1984. The present study deals with the interpretation of these aero radio spectrometric survey data, using conventional and modern statistical methods of analysis, in addition to reinvestigating the different mapped lithologies and considering them as interpreted radiometric lithologic (IRL) units. In this study, the geological map of the area was considered as a base for the radiometric lithologic interpretation of the data. The correlation between aeroradiospectrometry and lithology was conducted in two ways: the first one took into consideration the original lithological units, while the latter took into account the IRL units. The resultant interpreted radio lithologic unit (IRLU) map shows that, the study area contains four basement rock units and five sedimentary formations with various T.C radiometric levels and different radio element concentrations.