Alkaline Rocks and Carbonatites of the World

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

Sahara Granite (Wadi Um Adawi)


Occurrence number: 
Longitude: 34.05, Latitude: 28.08

The Sahara granite is a horseshoe-shaped pluton covering about 240 km2, of which 60 km2 are covered by recent sediments of the coastal plain (Bentor and Eyal, 1987). It is emplaced amongst other, but not alkaline, granites in the southern part of the Sinai Peninsula. This is one of the Wadi um Adawi granitoids of Higazy et al. (1992). The Sahara granite comprises microcline perthite, abundant quartz, riebeckite and accessory zircon, an opaque phase and fluorite. One variety of this granite, which grades into the normal type, is distinguished by the presence of arfvedsonite and, in some samples, titanite. Six chemical analyses, with some trace element data, are given by Bentor and Eyal (1987) and further analyses are in Abu El-Leil et al. (1997).

ABU EL-LEIL, I., ABDEL TAWAB, M. and ABDEL WAHAB, G. 1997. Geology and petrology of some migmatites and granitoids of Gabal Sabbagh, south Sinai, Egypt. Annals of the Geological Survey of Egypt, 20: 39-70.BENTOR, Y.K. and EYAL, M. 1987. The geology of southern Sinai its implications for the evolution of the Arabo-Nubian massif. 1: Jebel Sabbagh Sheet. The Israel Academy of Sciences and Humanities, Jerusalem. 484 pp.HIGAZY, M., ABDEL TAWAB, M. and AHMED, A.M. 1992. Geology of Wadi Um Adawi granitoids southeastern Sinai, Egypt. Annals of the Geological Survey of Egypt, 18: 39-43.
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