Petrogenesis and Mineralogy of Uranium bearing Granites, Rod Abu Nasser Area, South Eastern Desert, Egypt Ata Abdelshafy1, Gehan B. El Shaib1( *) | ||||
| Egyptian Journal of Geology | ||||
| Volume 69, Issue 1, 2025, Page 147-163 PDF (1.95 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/egjg.2025.377590.1111 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Gehan B El Shaib  1; ATA H ABDELSHAFY2
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| 1Aswan | ||||
| 2Nuclear Materials Authority | ||||
| Abstract | ||||
| Rod Abu Nasser area covered by metavolcanic rocks that have been intruded by younger granites. In addition to uranium-containing fluids, the younger granites occupy central, northweastern, and southeastern parts of the area; they form moderate to high outcrops and have sharp intrusive contacts with the surrounding metavolcanics. Hydrothermal alterations significantly affected these highly jointed rocks, particularly along faults and shear zones. Petrographically, the younger granites are monzogranites; they have essential minerals such as biotite, muscovite, quartz, microcline, perthite, and plagioclase. A common feature is enhancement in more mobile elements like K and U. Uranophane, fluorite, and zircon were found as accessories in mineralogical investigations and XRD studies. Radiometrically, the two anomalous are recorded, where they are enriched in uranium. Two U-mineralized zones (I and II) have been recorded associated with the studied granites. Zone (I) contains U values ranging from 99 to 470 ppm, whereas zone (II) has U levels ranging from 90 to 160 ppm. Granitic rocks are uraniferous because they have enrichment with uranium. While inter-element interactions confirm that radioelement distributions are hydrothermal and magmatic, field studies reveal that uranium distributions are litholigically and structually controlled. Radiometric studies indicate that the U and Th distribution in Rod Abu Nasser younger granite is mainly controlled by magmatic processes, although some secondary U enrichment processes affect in the anomalies by adding U by hydrothermal solutions. | ||||
| Keywords | ||||
| Rod Abu Nasser; younger granites; U-bearing granites | ||||
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