Late-orogenic gold deposits of Egypt
https://doi.org/10.17073/2500-0632-2018-1-89-96
Abstract
Egypt belongs to states developing its mineral resource base. Gold-bearing territory of Egypt is located within the Nubian-Arabian shield in the Neoproterozoic collision zone of transverse thrusts. Granitoid massifs are widely developed within this tectonic zone. The massifs of postorogenic granite (540−435 Ma) are confined to the tectonic collision zones of the Late Riphean and characterized by elevated alkalinity. Spatial relationship has been established between metasomatic halos of ultramafic rock carbonatization, granite intrusions in them, and gold mineralization. The gold mineralization is associated with quartz veins in the granite. In all these quartz gold-bearing veins, gold is associated with pyrite or aggregates of pyrite and arsenopyrite. The veining zones consist of massive quartz with impregnated gold and sulfide minerals. Thus, predominant type of the Precambrian gold mineralization is gold-quartz and gold-sulfide-quartz ore veins associated with zones of increased tectonic permeability of the crust and magmatic rocks – derivatives of granitic magmas and sulfide fluid systems.
About the Author
Hani Sharafeldin Elsayed
Russian State Geological Prospecting University n.a. Sergo Ordzhonikidzе
Russian Federation
Russian Federation
23, Miklouho-Maklay's street, Moscow, Russia, 117997
References
1. Nekrasov E.M., Dorozhkina L.A., Dudkin N.V. Osobennosti geologii i struktury krupnejshih zolotorudnyh mesto-rozhdenij jendogennogo klassa [Features of geology and structure of the largest gold ore deposits of the endogenous class]. Moscow, Astrea-Center, 2015, 192 p.
2. Abdelnasser A., Kumral M. Mineral chemistry and geochemical behavior of hydrothermal alterations associated with mafic intrusive-related Au deposits at the Atud area, Central Eastern Desert, Egypt. Ore Geol. Rev. 2016, 77, pp.1–24.
3. Akaad M.K., Noweir A. Geology and Lithostratigraphy of the Arabian Desert Orogenic Belt of Egypt between Lat. 25° 35′ and 26° 30′. Bulletin of the Institute for Applied Geology King Abdulaziz University 1980, Vol. 3, pp. 127–135.
4. Amin M.S. Geology and mineral deposits of Umm Rus sheet. Geological Survey of Egypt, Cairo, 1955.
5. Azzaz A.S. Distribution of gold and associated elements in the wallrocks of the Sukkari gold deposit, Central Eastern Desert, Egypt. Arab. J. Sci. Eng. 1987, 12 (3), pp. 243-250.
6. Botros N.S. The role of the granite emplacement and structural setting on the gen¬esis of gold mineralization in Egypt. Ore Geol. Rev. 2015, 70, pp.173-187.
7. Cavaney R.J., Geology of Sukari Gold Mine, Eastern Desert Egypt. (Internal Report to Centamin Egypt Ltd and Pharaoh Gold Mines) 2005.
8. Cook N.J, Chryssoulis S.L. Concentrations of ‘‘invisible gold’’ in the common sulfides. Can Mineral.1990, 28:pp.1–16
9. El Shazly E.M. Classification of the Egyptian mineral deposits, Egypt. Cairo, Egyptian Journal of Geology, 1957, vol. 1, pp. 1-20.
10. Fritz H., Abdelsalam M., Ali, K.A., Bingen B., Collins A.S., Fowler A.R., Ghebreab W., Hauzenberger C.A., Johnson P.R., Kusky T.M., Macey P., Muhongo S., Stern R.G., Viola G. Orogen styles in the East African Orogen: a review of the Neoproterozoic to Cambrian tectonic evolution. J. Afr. Earth Sci. 2013, 86, pp. 65-106.
11. Fritz H., Dalmeyer D.R., Wallbrecher E., Loizenbauer J., Hoinkes G., Neumayr P., Khudeir A.A. Neoproterozoic tectonothermal evolution of the Central Eastern Desert, Egypt: a slow velocity tectonic process of core complex exhumation. J. Afr. Earth Sci. 2002, 34, pp. 543-576.
12. Fritz H., Wallbrecher E., Khudier A.A., Abu El Ela, F., Dallmeyer R.D. Formation of Neoproterozoic metamorphic core complexes during oblique convergence, Eastern Desert, Egypt.J. Afr. Earth Sci., 1996, 23, pp. 311-329.
13. Greiling R.O., Abdeen M.M., Dardir A.A., El Akhal H., El Ramly M.F., Kamal El Din G.M., Osman A.F., Rashwan AA, Rice A.H., Sadek M.F. A structural synthesis of the Proteorozoic Arabian-Nubian Shield in Egypt. Geol. Rundsch.1994. 83, pp. 484-501.
14. Ghoneim M.F., Bjørlykke A., Harraz H.Z. Rb–Sr and Sm/Nd Isotopic Systems of El Sukkari Granite, Eastern Desert, Egypt. 1st Int. Conf.on the Geology of Africa, Assiut, Egypt, 1999,1, pp. 281–282.
15. Harraz H.Z., Hamdy M.M. Zonation of primary haloes of Atud auriferous quartz vein deposit, Central Eastern Desert of Egypt: a potential exploration model targeting for hidden mesothermal gold deposits. J. Afr. Earth Sci. 2015, 101, pp. 1–18.
16. Helmy H.M., Kaindl R., Fritz H. The Sukari gold mine, Eastern DesertEgypt: structural setting, mineralogy and fluid inclusion study. Mineralium Deposita, 2004, 39, pp. 495–511.
17. Hume W.F. A preliminary report on the geology of the Eastern Desert of Egypt between Latitudes 22 degrees north and 25 degrees north; Egyptian Survey Dept., Cairo, 1907. (Paper No. 1).
18. Khalaf I.M, Oweiss K. A. Gold prospection in the environs of Sukari gold mine, central Eastern Desert, Egypt. Ann. Geol Surv Egypt.1993. 19:97–108.
19. Khalil I. K., and Arslan A.I. Petrography – Thin Section transmitted Light and Reflected light study of specimens from Sukari Gold Mine, Internal consulting reports, July and December 2006.
20. Kochin G.G., Bassiuni F.A. The mineral resources of the UAR, Report on gener-alization of geological data on mineral resources of the UAR carried put under contract 1247 in 1966-1968. Part I, Metallic minerals: Internal report, Geol. Surv. of Egypt, 18/1968.
21. Mohamed A. Abd El-Wahed, Harraz H., El-Behairy M.H. Transpressional imbricate thrust zones controlling gold mineralization in the Central Eastern Desert of Egypt. Ore Geology Reviews, 2016, 78, pp. 424-446.
22. Sabet AH, Bordonosov VP. The gold ore formations in the Eastern Desert of Egypt. Ann. Geol. Surv. Egypt, 1984, 16:pp. 35–42.
23. Sharara N.A. Stable Isotopes and Fluid Inclusions of the Gold Mineralizations at El Sukkari District, Central Eastern Desert, Egypt: Genetic Constraints. International Conference on Geochemistry, Alexandria University, Egypt, 15-16 Sept 1999, pp. 317-339.
24. Smith,P., Osman R., Franzmann D., Johnson N., Boreham C. Mineral Resource and Reserve Estimate for the Sukari Gold Project. Egypt. Internal Technical Report, Centamin Egypt Ltd, 2017, (177p.).
25. Stern R.J., Johanson P.R., Kroner A., Yibas B. Neoproterozoic Ophiolites of the Arabian-Nubian Shield. In: Kusky, T.M. (Ed.), Precambrian Ophiolites and Related Rocks Developments in Precambrian Geology Vol. 13. Elsevier, Amsterdam, 2004, pp. 95-128.
26. Takla M.A., El Dougdoug A.A., Rasmay A.H., Gad A.A., El Tabbal H.K. Origin of Um Eleiga gold mineralization, south Eastern Desert, Egypt. Egypt, 1990, Mineral, 2, pp. 3-20.
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For citations:
Elsayed H.Sh. Late-orogenic gold deposits of Egypt. Mining Science and Technology (Russia). 2018;(1):89-96. (In Russ.) https://doi.org/10.17073/2500-0632-2018-1-89-96
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