Al-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253525Issue 2-D20141201MINERALOGICAL, GEOCHEMICAL AND ENVIRONMENTAL DEPOSITION OF CLAY IN ESNA SHALE AT EL-BURUK – EL-HASSANA AND EL-HIMMAH – BAGHDAD AREAS NORTH SINAI, EGYPT.1202262910.21608/absb.2014.22629ENM.HAwad,Departments of Geology* , Al Azhar university,G.AAl Nadeem,Egyptian mineral resources authorityS.A.Sameeh,Egyptian mineral resources authorityI.MOsman,Egyptian company for mineral resourcesJournal Article20140709This paper deals with the study of the Mineralogical, Geochemical and Environmental deposition of Clays in Esna Shale at El-Buruk- El-Hassana and El- Himmah Baghdad areas, North Central Sinai, Egypt. The present work is based on the field and laboratory work carried out by present authors. sixty stratigraphic sections representing Esna shale unit in the study area were studied, measured and sampled. The laboratory work comprise 17 samples for XRD analysis to study the mineral constituents of the clay and argillaceous rocks and 36 samples for chemical analysis using XRF method to detect the major oxides SiO2, Al2O3, Fe2O3, CaO, MgO, TiO2, MnO, Na2O, K2O, SO3--, Cl-, P2O5 and L.O.I. and ten samples for the trace constituents, F, Ba, Cr, Cu, Li, Ni, Zn, As, B, Ga, Se, Y, V, Co, Rb, Sr, Nb, Mo, Sn, Sb, La, Yb, Hf, Ta, Pb, Zr and Ce. Montmorillonite and kaolinite are the main constituents of clays. The other associated minerals are quartz, gypsum, halite and dolomite. Geochemical speaking, SiO2, Al2O3, K2O and Na2O are controlled by the amount of montmorillonite, kaolinite and illite while CaO and MgO contents are controlled by calcite and dolomite which occur as minor constituents. The high and low contents of Fe2O3 and MnO respectively are attributed to the low oxidation potential that prevailed during the deposition of clay causing precipitation of Fe+2 keeping Mn+2 in soluble state. Esna Shale of the study areas are deposited in deposition environments changes from very shallow inner neritic zone to outer neritic zone.Al-Azhar University, Faculty of Science (Boys)Al-Azhar Bulletin of Science1110-253525Issue 2-D20141201STREAM SEDIMENTS SURVEY FOR URANIUM IN WADI El-Reddah, North Eastern Desert, Egypt29422263010.21608/absb.2014.22630ENH. A.,EL Nahas,Nuclear Materials Authority (NMA), P.O. Box 530 El Maadi, Cairo, EgyptO. A.,Desouky,Nuclear Materials Authority (NMA), P.O. Box 530 El Maadi, Cairo, EgyptM.,Abdel Monsif,Nuclear Materials Authority (NMA), P.O. Box 530 El Maadi, Cairo, EgyptN. S.Elsayed,Nuclear Materials Authority (NMA), P.O. Box 530 El Maadi, Cairo, EgyptJournal Article20140709The radiometrical study carried out for the stream sediments of Wadi El-Reddah reveals that uranium is in a disequilibrium state and uranium concentrations in recent uranium deposits are seldom detected by scintillometer. On this base, two types of uranium deposits of the studied sediments are recorded; old and recent uranium deposits. eTh/eU ratio of old uranium deposits in the studied sediments suggests poor weathering and rapid deposition of rock detritus. On the other hand, eTh/eU ratio of recent uranium deposits indicates that these sediments are developed under conditions where uranium was removed from its source and fixed in the sediments with continuous recharge. Two notifications were recorded, the first concerning with the stable increasing of uranium in all directions of Wadi El-Reddah and uniformly decrease in the central part. The second related to the uniform vertical distribution of uranium to one meter depth and may become different in more depths. The qualitative and quantitative mineralogical studies on the stream sediments of Wadi El-Reddah reveals that the most important heavy minerals include uranothorite, zircon, monazite, xenotime, apatite and cassiterite as well as opaque minerals such as ilmenite, magnetite, rutile and hematite. Some very rare minerals were observed in the stream sediments as bismite.<br />Alpha spectrometry plays an important role in the determination of uranium isotopes concentration in the recent samples.<br />The extraction for uranium was increased after modification of the old radiochemical procedure.