Browsing by Author "Holail, Hanafy [حنفي محمود هليل]"
Now showing items 1-7 of 7
-
Diagenesis of the middle eocene "nummulite bank" of The giza pyramids plateau, Egypt: petrologic and 18o/16o evidence
Holail, Hanafy [حنفي محمود هليل] ( Qatar University , 1994 , Article)The Middle Eocene "nummulite bank" of the Giza Pyramids Plateau has been extensively altered diagenetically. The result of a study involving petrography, cathodoluminescence, and 18O/160 and 13C/12C data, provide information ... -
Diagenetic Trends In The Pleistocene Calcareous Ridges, Mersa Matruh Area, Egypt
Holail, Hanafy [حنفي محمود هليل] ( Qatar University , 1993 , Article)Ooids are a major constituent of the Pleistocene carbonates along the northwestern coastal ridges of Egypt. For a detailed diagenetic study of the rocks, the Mersa Matruh area was selected. Petrographic examination shows ... -
Evidence of an authigenic origin for palygorskite in a Middle Eocene carbonate sequence from North Qatar.
Holail, Hanafy [حنفي محمود هليل]; Al-Hajari, S. ( Qatar University , 1997 , Article)The "Simisma Member" from the Ras Laffan area in North Qatar is mainly composed of dolomites of shallow marine origin. Clay minerals contained in the dolomite (average 4%) are mainly palygorskites. There is no indication ... -
Mineralogical and Geochemical Compositions of Modern Bivalve Shells from The Mediterranean Coast Of Egypt
Holail, Hanafy [حنفي محمود هليل]; Tony, R. ( Qatar University , 1993 , Article)The stable isotopic (8 ^C and 8^O) and elemental (Sr and Mg) compositions are presented for marine mollusc Carditacea and Solenacea shells collected off the Mediterranean coast of Egypt. Based on shell microstructures and ... -
Mineralogical And Geochemical Evaluation Of Upper Cretaceous Black Shales, Safaga District, Egypt.
Holail, Hanafy [حنفي محمود هليل]; El Dahhar, M.; Abd Alla, M. ( Qatar University , 1995 , Article)Lithologic and compositional properties of black shale and pyrite from the Upper Cretaceous phosphorite/black shale deposits (Duwi Formation) of Eastern Desert of Egypt indicate similarity in mineralogy, geochemical ... -
Petrographic And Chemical Microheterogeneity In Dolomite, Bahariya Oasis, Egypt
Holail, Hanafy [حنفي محمود هليل]; Shaaban, M.; Khalifa, M. ( Qatar University , 1994 , Article)Dolomite samples from the lower member of the El-Hafhuf Formation (Turonian-Santonian) possess noticeable petrographic and chemical heterogeneity among their fabric components. Petrographically, the study samples can be ... -
Stable isotopic composition, stoicometry and origin of Siliceous dolomite of naqb siwa member Bahariya oasis, Egypt
Holail, Hanafy [حنفي محمود هليل]; Lohmann, K. K. C. ( Qatar University , 1994 , Article)The Lower Campanian Naqb Siwa member exposed near Bahariya Oasis, Egypt, is a shoal ing-upward dolomite sequence that hosts chert nodules and lenses and cavity fillings of quartz and calcite. Dolomite is dominantly replacive, ...