Placer Gold Deposits in Madari Gold Mine, Southern Eastern Desert, Egypt: Orientation, Source and Distribution
Authors: Tarek Sedki
Madari gold mine is delineated by latitudes 22° 30' 29" and 22° 32' 33" N and longitudes 36° 24' 03" and 35°11' 44" E. Geologically, Madari rock units are classified into dismembered ophiolites, arc volcanic assemblage, syntectonic metagabbro-diorites and Mineralized quartz diorite and granodiorite. Deposition of gold in area occurred as a direct result of weathering of nearby gold-bearing veins. Main concentrations of gold are supposed to ensue close to the bed rock. Nevertheless, the several shallow channel-fill features covering lag deposits, arising throughout the alluvial fan sequence would definitely contain a percentage of the finer gold due to the limited washing and sorting capacity of the uncommon flood events. Gold deposits arise as disseminated and separate gold with limited pyrite, arsenopyrite and chalcopyrite everywhere veins in the wall rocks and lode gold deposits in quartz veins. In places, the wall rocks, in near district of the quartz vein, are grieved strong silicification, chloritization and pyritization as a result of a metasomatic alteration due to purification of external hydrothermal fluids. Quartz veins are mostly steeply dipping and display banding features and frequently sheared and brecciated.Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 104
 Wells, J. H. (1969). "Placer Examination, Principles and Practice. United States Department of the Interior, Bureau of Land Management." Technical Bulletin 4.
 Schumm, S. A. (1985). "Patterns of alluvial rivers." Annual Review of Earth and Planetary Sciences 13: 5-27.
 Said, A., Zaghlol, K, and El Shimi, K. (2015). "Gold bearing-quartz veins in island arc metavolcanics, case study: Wadi mahasin, west Qusier, Central Eastern Desert, Egypt."
 Hassan, M.M. and El Mezayen, A.M. (1995). Genesis of gold mineralization in the Eastern Desert, Egypt. Al-Azhar Bulletin of Science v. 6: pp. 921-939.
 Klemm, D. D., Klemm, R., Murr, A. (2001). "Gold of the Pharaohs-6000 years of gold mining in Egypt and Nubia" J. Afr. Earth Sci. v. 33: pp. 643-659.
 Zoheir, B., Emam, A., El Amawy, M., Abu Alam, T. (2017). "Auriferous shear zones in the central Allaqi-Heiani belt: Orogenic gold in post-accretionary structures, SE Egypt." Journal of African Sciences, v. 30: pp.1-14.