Volcanic and metavolcanic rocks intruded by the Um Ara granites, a larger oval-shaped monzogranite pluton and a smaller alkali-feldspar microgranite emplaced at its northern contact. Both granites are peraluminous to metaluminous. The U- and Th-bearing alkali-feldspar granite is cut by pegmatite veins and locally abundant veinlets of purple and colourless fluorite. Secondary uranium minerals occur as disseminations, as aggregates and as cavity fillings.
References:
- Abd El-Naby, H.H. (2009): High and low temperature alteration of uranium and thorium minerals, Um Ara granites, south Eastern Desert, Egypt. Ore Geology Reviews 35, 436-446.
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Map Reference: 22°39'N , 33°49'E
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Mineral List:25 entries listed. 18 valid minerals.
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