A ring-dyke about 1 km in diameter, with other irregular intrusions inside it, occurs on the northern side of Wadi Antar cutting Nubian basalts and sandstones. The dykes are latites and syenite porphyries, but it is not clear from the description whether these are peralkaline.
EL RAMLY, M.F., BUDANOV, V.I. and HUSSEIN, A.A.A. 1971. The alkaline rocks of south-eastern Egypt. Geological Survey of Egypt, Paper, 53: 1-111.