TY - CPAPER AU - A. M. Zayed TI - EVALUATION OF THE QUARTZ DEPOSITS OF MARWIT ROD EL-LEQAH AREA, EASTERN DESERT, EGYPT, AS A POTENTIAL SOURCE OF HIGH PURITY QUARTZ (HPQ) T2 - 10th International Multidisciplinary Scientific GeoConference SGEM2010 PY - 2010 SP - 645 EP - 652 PB - SGEM Scientific GeoConference ER -