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Volume :5 Issue : 1 1978
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Petrographic studies of Ras Barud granitic rocks, Safaga District, Eastern Desert, Egypt
Auther : ADEL M. REFAAT, MAHMOUD L. KABESH AND ZEINAB M. ABDALLAH
Teachers Institute of Education, El-Odylia. Kuwait; Earth Sciences Laboratory, National
Research Centre, Dokki, Cairo; Teachers Institute of Education, El-Shamia, Kuwait
ABSTRACT
The examined granitic batholith consists mainly of red, pink, buff, greyish-white and white granites in addition to adamellites, grey granodiorites and quartz diorites. Under the microscope, the investigated granitic rocks show 45 petrographic varieties. Myrmekite intergrowths are studied in these granitic rocks including normal and intergranular myrmekitic textures. These intergrowths are formed due to the action of exsolutions, replacements and metasomatic processes in addition to the simultaneous crystallization which took place between quartz and feldspar minerals. The classification of these granitic rocks was attempted on the basis of modal analyses and was found to agree to a great extent with the field and petrographic classification.