ABSTRACT
El Shazly classified the mineral deposits of Egypt on the basis of time relations and their supposed mode of formation, hr his classification the mineral occurrences are grouped under Precambrian, Cretaceous, Miocene and Pleistocene to Recent deposits, with a further classification of the Precambrian group into early and late subgroups. Small and irregular masses of podiform chromites are frequent within serpentinized members of ophiolitic sequences in the Eastern Desert, mostly south of latitude 26° N. Copper-nickel-cobalt sulfide deposits are known to occur in two petrological assemblages of the maficultramafic association, namely in the gabbroic members of ophiolite sequences and in layered intrusions. Both types are represented in Egypt by Abu Swayel and El Geneina for the former, and Gabbro Akarem for the latter. A number of Ti-Fe oxide deposits are known in Egypt, in association with mafic-ultramafic masses that include rocks ranging in composition from melagabbro-melanorite to anorthosite.
