.Analysis and Interpretation of Airborne Gamma- ray Spectrometry and Magnetic data for evaluation of Radioactive minerals and surface and subsurface magnetic bodies of Alm Agayeb area , West Dakhla Oasis , Central Western Desert , Egypt

Abstract

The study area is located at 120 km at the west of the Dakhla Oasis, Central Western Desert of Egypt. The study area of this survey is bounded by latitudes 25 23' 55” and 26 31' 16" N and longitudes 26 15' 24" and 27 30' 9”. The sedimentary rocks occupy the study area and ranging from Jurassic age to Quaternary. In Sep 24, 2014, Airborne Geophysics Department (AGD) of the Nuclear Materials Authority conducted a high resolution multi-channel gamma-ray spectrometric and magnetic survey covering an area of approximately 19,625 km2 with 29,540 line kilometer over West Dakhla area, Central Western Desert, Egypt. The data were acquired along flight lines oriented in N-S direction using 4000 m line spacing and along Tie lines oriented in E-W direction using 10000 m line spacing. Nominal flying elevation was used to be 100 m above ground floor. The purpose of this study is the analysis, evaluation and interpretation of the aerial radiospectrometric and magnetometric survey data acquired over the area. The interpretation is mainly devoted towards the achievement of many objectives, namely: geological (lithological and structural) mapping, mineral exploration especially uranium anomalous zones of the area under consideration. Application of the image display and enhancement techniques available on image processing systems to the gridded geophysical data sets-