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Department of Geology, University of Kuwait

ABSTRACT

Fifteen chemical analyses for both major and trace elements are given of inhomogeneous rocks of Wadi Mubarak-Gabal Atud, metagabbro-diorite complex in the central Eastern Desert of Egypt. The analyses show an oversaturated composition and a calc-alkaline character and provide evidence against the origin of the rocks from a differentiating basic magma. The hybrid origin of the investigated rocks appears unequivocal and is based on both field and chemical evidences. The hybrid rocks are believed to have been formed as a result of interaction between granitic and gabbroic components while the former was liquid and before the latter became completely solidified.