Résumé: Algeria has long sought to exploit its uranium deposits in the Hoggar region; whose objective is to market the ore, and why not, use part of the production in the exclusively civil field, especially in electricity generation. The exploitation and valorization of this ore; require a very specific process of exploitation, characterization and treatment. The main objective of this work is to establish a detailed and complete technical data sheet for the Tahaggart deposit, enabling the implementation of a uranium ore mining and beneficiation technique to obtain a marketable product known as "Yellow Cake". To achieve this objective, samples were taken from the site under study, followed by microscopic and macroscopic analyses non-thin sections to obtain petrographic, mineralogical and geochemical identifications. Thus, analysis of samples related to conglomeratic sandstones and alteration facies confirmed the sandstone character of the Tahaggart ore. The determination of chemical elements in the various ore samples also showed the predominance of certain chemical elements: quartz, clays (kaolinite), iron oxides and hydroxides, uranium minerals and rutile. Uranium grades varied from 0.90 to 1.32% in the mineralized altered levels and from 0.34 to 0.74% in the mineralized conglomeratic sandstones. Uranium was also remarkably present in both facies, and was more concentrated in the altered levels. It occurred either in uraniferous minerals with high contents, or with low contents in other minerals such as apatite, zircon, rutile and monazite in trace amounts within their structures