%0 Journal Article %@ 0365-8066 %A Salem Abdel-Karim Ahmed %A Heikal Mohamed A. %A Kabesh Mahmoud Lofty %A Salem M. A. %C Szeged %D 1987 %F acta:24757 %I University of Szeged, Department of Mineralogy, Geochemistry and Petrology %J Acta mineralogica-petrographica %K Kőzettan, Ásványtan, Földtan, Geokémia %P 47-56 %T Geochemistry of biotite and its significance as a guide to the origin of the granitoid rocks of El-Imra area, Eastern Desert, Egypt %U http://acta.bibl.u-szeged.hu/24757/ %V 29 %X Biotites from the granitoid rocks of El-Imra, Eastern Desert, Egypt have been examined. The chemical data of 8 new analyzed biotites are presented. The behaviour of major and trace elements in the examined biotites are discussed according to different variation diagrams. The chemical composition of biotites has proved a reasonable guide to the magmatic origin of the host granitic rocks. %Z Bibliogr.: 56. p. ; ill. ; összefoglalás angol nyelven