CONTRIBUTION TO THE GEOLOGY, PETROLOGY AND AIRBORNE GAMMA-RAY SPECTROMETRY OF GABAL EL-MUEILHA GRANITIC ROCKS, SOUTHERN EASTERN DESERT, EGYPT | ||
| Nuclear Sciences Scientific Journal | ||
| Article 4, Volume 8, Issue 1, 2019, Pages 59-78 PDF (10.37 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/nssj.2019.29975 | ||
| Author | ||
| Ismail M. Abdel Ghani | ||
| Nuclear Materials Authority, Cairo, Egypt | ||
| Abstract | ||
| Gabal (G.) El-Mueilha Granitic rocks are represented by an oval shaped stock that intruding the surrounding older rock units including ophiolitic mélange, metavolcanics, older granitoids and younger gabbros and sending several offshoots into them. The study area is affected by several fault systems in NW-SE, NE-SW and N-S directions. Petrographically, these younger granites are mainly represented by muscovite granite (syenogranite) that shows different degrees of albitization especially at the peripheral parts of the stock beside the ferrugination and silicification. The main accessory minerals are cassiterite, fluorite, zircon, beryl, monazite, thorite and uranothorite which are responsible for the radioactive anomalies in G. El-Mueilha syenogranitic mass. The airborne gamma ray spectrometry shows high radioactive anomaly restricted to the younger granitic mass relative to the other surrounding rocks that have low to moderate radioactivity. The eTh/eU ratio of G. El-Mueilha syenogranite indicates U-enrichment especially during albitization processes. | ||
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