Factors controlling the uranium mineralization in Um Ara granite, South Eastern Desert, Egypt

The post tectonic younger granites (YG) of Egypt contain most of the discovered radioactive mineralization. The Urn Ara granitic pluton is one of the promising sources of possible uranium mineralization especially along the contact with the Dokhan volcanic rocks. It is characterized by a disseminated type uranium mineralization slightly affected by alteration possesses. The present study aims to establish guide criteria for the development of the uranium resources in this granite. Detailed mapping and field observations as well as a spectrometric survey were acquired according to a 20x50m. grid pattern for the most important anomalous zones. Analyzing major oxides and trace elements for thirty three samples covering the granite. A metasomatic rather than crystal fractionation process has been proposed for the rare metal enrichment in the Um Ara granite. The rare metal mineralization results from upward movement of post-magmatic fluids which has leached the metals from the lower part of the pluton and concentrating them in the apical part.