Abstract
The present work represents an attempt to formulate the petrographical and geochemical characteristics of some younger Pan-African granitoids of Gabal Hamra area and to deduce their tectono-magmatic setting. The study area is located at about 44 Km to the east of the Gulf of Suez, southwestern Sinai, Egypt. The investigated rock types outcropping in the study area constitute mainly syenogranites and subordinately monzogranite and pertaining to Pan-African age.
The petrographical studies resulted in the identification of the secondary uranium mineral, kasolite for the first time in Wadi Ghadir locality of the study area.
Major and trace element analyses for 37 representative samples of the studied grantoids were investigated. The data was petrochemically and geochemically processed applying several parameters and variation diagrams. The studied granitoids generally pertain to phase III of the Egyptian younger granites and match well with the low Cagranites. They are post orogenic granitoids and have been originated from highly differentiated magma of alkaline to calc-alkaline affinity. The trace elements data revealed that the studied granitoids located near the boundary between volcanic arc and syn-collision granitic fields.
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References
Abu El Enen, M. M., 1989: Geological and geochemical studies on granitoid rocks of Wadi Seih area, Southwestern Sinai, Egypt. M. Sc. Thesis, Mansoura University, 134p.
Buarker, F., 1979: Trondhjemites: definition, enviroment and hypotheses of origin, in Barker, (ed), trondhjemites, dacites and related rocks. Elsevier, Amesterdam, 6, 1–12.
Cuoleman. R.G., and Donato, M.M., 1979: Oceanic plagiogranites revisited, in Barker, (ed), trondhjemites, dacites and related rocks. Elsevier, Amesterdam, 149–168.
Cuoleman, R.G., and Peterman, Z.E., 1975: Oceanic plagiogranites. J.Geophys. Res., 80, 1099–1108.
Due La Roch, H., Leterrier, J. Grand Claude, P. and Marchai, M., 1980: A Classification of volcanic and plutonic rocks using RI-R2 diagram and major element analyses. Its relationships with current nomenclature. Chem. Geol., 29, p. 183–210.
El Bouseily, A.M., and El Sokkary, A.A., 1975@ The relationship between Rb, Ba and Sr in granitic rocks, Chem. Geol., 16, 207–219.
El Galy, M. M., 1994: Geochemical and radiometfic studies of some grani’ tic rocks at Gabal Hamra area, Southwestern Sinai, Egypt. M. Sc. Thesis, Tanta Univ. Egypt, 200p.
El Reedy, M.W., 1984: The general physical and chemical features and the pollution level of El Sabahia-Sabhan-El Reqa soil localities, Internal Report, State of Kuwait. Report represented to environmental protection Dept., Ministry of public Health, El Kuwait (part 1: Chemical Methods).
Greenberg, J.K., 1981: Characteristics and origin of Egyptian younger granites, Geol. Soc. Am. Bull, part 11, 92, 748–840.
Irvine, T.N., and Baragar W.R.A., 1971: A guide to the chemical classification of the common volcanic rocks, Can. J. Earth Sci., 8, 523–548.
Kuno, H., 1968: Deffrentiation of basaltic magmas, in H. H. Hess and A poldevaart (eds), Treatise on-basaltic rocks, 2, Interscience, John Wiley, New York, 623–688.
Maniar, P.D., and Piccoli, P.M., 1989: Tectonic discrimination of granitoids, Geol. Soc. Am. Bull., 101, 635–643.
Mason, B., 1966: Principles of geochemistry. 3rd Ed. John Wiley, New York, 31 Op.
Nockolds, S. R., 1954: Average chemical composition of some igneous rocks, Geol. Soc. Am. Bull., 66, 1007–1032.
O’Connor, J.T., 1965: A classification of quar-tz-rich igneous rocks based on feldspar ratios, U.S. Geol. Surv., Prof Pap. 525B, 79–84.
Pearce, J. A., Harris, N. G. W. and Tindle, A.G., 1984: Trace element discrimination diagrams for the tectonic interpertation of granitic rocks. J. Petrol., Vol. 25, p. 956–983.
Rogers, J. J. W. and Greenberg, J. K., 1981: Alkaline granites and their relationship to cratonization, Geological Society of amefica bull., Part 1, 92, 6–9.
Shapiro, L., and Brannock, W.W., 1962: Rapid analysis of silicate, carbonate and phosphate rocks, U.S. Geol, Surv. Bull, I 144-A., 56p.
Shefif, H. M, 1992: Geology and radioactivity studies of Wadi El Berra area, South Sinai, Egypt. M. Sc. Thesis, Suez Canal Univ., Egypt.
Streckeisen, A., 1976: Classification of common igneous rocks by mean of their chemical composition. A piovissional attempts. N. Jb. Nfineral. Mh., H. I., p. 1-15, Stuttgart, Germany. — Thoronton, C.P., and Tuttle, O.F., 1960: Chemistry of igneous rocks. Part. 1, Differentiation Index. Am. J. Sci, 258, 9, 664–684.
Turkean, K. K. and Wedephol, K. H., 1961: Distribution of the elements in some major units of the Earth’s crust, Geol. Soc. Am. Bull., 72, 175–192.
Tuttle, O. F. and Bowen, N. L., 1958: Origin of granite in the light of experimental studies in the system NaAlSi3O8KAISi3O8-SiO2-H20. Geol. Soc. Am. Mem., Vol. 74, 153p.
Winchester, Y. A. and Floyed, P. A., 1976: Geochemical magma type discrimination. Application to altered and metamorphosed basic-igneous rocks, Earth Planet, Sci. Lett., 28, 459–469.
Wright, G.B., 1969: A simple alkalinity ratio and its application to questions of non-orogenic granite genesis, Geol. Mag., 106, 370–384.
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Hussien, H.A., El Shazly, A.G., El Assy, I.E., El Galy, M.M. (1999). Petrogenesis of Pan-African Granitoids, Gabal Hamra Area, Southwestern Sinai, Egypt. In: Sinha, A.K. (eds) Basement Tectonics 13. Proceedings of the International Conferences on Basement Tectonics, vol 7. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4800-9_8
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DOI: https://doi.org/10.1007/978-94-011-4800-9_8
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