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Volume :6 Issue : 1 1979
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Petrographical and petrochemical characters of some basalt dykes, Gebel Abu Dob area, Eastern Desert, Egypt
Auther : AHMED M. BISHADY AND MAHMOUD L. KABESH
Teachers Institute of Education, El-Odylia, Kuwait and Earth Sciences Laboratory, National Research Centre, Dokki, Cairo, Egypt
ABSTRACT
Basalt dykes dissecting the granitic complex of Gebel Abu Dob, Eastern Desert, Egypt, are examined. Petrographic study of these dykes revealed the following varieties: pyroxene-hornblende basalt, hornblende basalt, biotite-hornblende basalt, quartz-bearing basalt and olivine basalt. Major element chemistry of 15 basalt dykes is presented and discussed. Petrochemically, the examined basalts are high in A1 and belong to the tholeiitic series. Classification of the basalt dykes is attempted, using various schemes which comprise modal analysis, chemical composition, norm values, Kunos S.I. and Kushiro and Kunos relations.