The main objective of this research is to integrate geology with remote sensing techniques to establish common characteristic features leading to the recognition of other uranium mineralizations within the Pan-African younger granites of the Eastern Desert of Egypt. The association of aplites, quartz and jasperoid veins and lamprophyric dykes as well as alteration processes throughout and near the mineralized sectors appear to play an important role in the distribution and localization of the mineralization. investigations confirm the presence of uranophane mineral as uranyl silicates. The uranophane mineral is found in close association with hematite, quartz, calcite and chlorite. Relics of corroded pyrite grains are disseminated in the groundmass and filling some vugs and cavities. The uranium mineralization is found adsorbed and enclosed around pyrite. This may indicate that the presence of pyrite created a reduced environment favourable for the precipitation and fixation of uranium.
Um-Bogma area located in the westcentral part of Sinai, Egypt is covered by Precambrian basement rocks within the northern part of the Precambrian Arabian-Nubian crystalline massive. Satellite images are among continuous sources of digital data for mapping lineaments and lithology. In the present work, the lithologic discrimination and lineament analysis of Landsat-7 ETM+ data for Um Bogma area have been carried out using Geomatica PCI EASI/PACE (9.1) and GeoAnalyst PCI packages. A selective image processing technique (SIPT) is a new approach in Geomatica, which gives rise to valuable results in this work. The SIPT and the visual interpretation of the constructed Landsat false colour composite (FCC) and ratio images led to discriminate and delineate the lithologic rock units of the study area. The structural lineament pattern for each interpreted lithologic unit has been constructed using SIPT. The prepared rose diagrams for the extracted lineaments are very characteristic for each interpreted lithologic unit. The structural lineament analyses and the discriminated lithologic units are integrated to show their relationships to the high radioactivity occurrences of the study area. The NW-SE trend is the predominant regional structural lineament trend in the investigated area. The NE-SW to the ENE-WSW directions is the predominant minor structural lineament trends. The highest radioactivity zones of the study area are restricted to Um Bogma formation and the younger granitic rocks.
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