Alkaline Rocks and Carbonatites of the World

Setup during HiTech AlkCarb: an online database of alkaline rock and carbonatite occurrences

Wadi Araba


Occurrence number: 
Longitude: 32.48, Latitude: 29.13

Nephelinites occur at a number of localities in Wadi Araba. They are apparently lavas but few details of field occurrence have been located. In one specimen pyroxene forms more than half of the rock with approximately 10% olivine, 14% opaque phases and interstitial nepheline 18%; some varieties contain analcime rather than nepheline. Rock analyses are available (Meneisy et al., 1976).

A K-Ar date of 125±4 Ma was obtained by Meneisy and Kreuzer (1974a) on a sample of olivine nephelinite.
MENEISY, M.Y. and KREUZER, H. 1974a. Potassium-argon ages of Egyptian basaltic rocks. Geologisches Jahrbuch, Hannover, D9: 21-31.MENEISY, M.Y., OMAR, A.A. and SHAABAN, M.M. 1976. Petrology of the volcanic rocks of Wadi Araba - Abu Darag, Eastern Desert, Egypt. Chemie der Erde, 35: 63-75.
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