01689nab a2200241 i 4500 acta24697 20220726080314.0 161017s1982 hu o 0|| eng d 0365-8066 SZTE Egyetemi Kiadványok Repozitórium hun eng Refaat Adel M. Petrographical and geochemical studies of the Al-Bayda granites, South Eastern Sector, Yemen Arab Republic [elektronikus dokumentum] / Refaat Adel M. University of Szeged, Department of Mineralogy, Geochemistry and Petrology Szeged 1982 169-178 Acta mineralogica-petrographica 25 No. 2 The study of the Al-Bayda pluton comprises petrography and chemistry of thé different granite varieties which are related to the basement rocks in the south eastern sector of the Yemen Arab Republic. According to the modal and chemical data, the present granite can be classified as syeno-granite and kali-granite, respectively. In the Al-Bayda granites, a perthitization had taken place through exsolution and replacement processes. Generally, the investigated granites were crystallized from an acidic melt during a very limited differentiation stage. Finally, the Al-Bayda granites suffered greatly from metasomatism at a postmagmatic stage producing a type of granite related to the anomalous group. Természettudományok Föld- és kapcsolódó környezettudományok Kőzettan, Ásványtan, Földtan Kabesh Mahmoud Lofty aut Abdallah Zeinab M. aut http://acta.bibl.u-szeged.hu/24697/1/mineralogica_025_fasc_002_169-178.pdf Dokumentum-elérés