Abstract
El-Daghbag-I gold mineralization is a part of El-Daghbag gold deposit, Central Eastern Desert, Egypt. It is represented by several NW-trending quartz veins cutting across highly sheared granodiorite rocks along NW-trending shear zone. The recorded ore mineral assemblage is magnetite, ilmenite, native gold, pyrite, chalcopyrite, sphalerite and galena. Bornite, covellite and goethite are the secondary ore minerals. Statistical parameters, Clark of Concentration, linear productivity, contrast coefficient, zonality index and zoning coefficient were calculated to investigate the geochemical association and whether there are factors controlling distribution of its members. The geochemical primary distribution patterns of gold and the elements properly forming the mineralization revealed that the gold associated elements are (Cu, As, Zn, Ni, Co, Ag and Pb). These elements occur as proper ore sulfide-minerals. The recorded lateral zoning sequence of deposition along the NW-SE extension of the main quartz vein is (Ag-Co-Ni-Cr-Cu-As-Zn-Pb). The lateral zoning sequence along the SW-NE trend crossing the quartz vein exhibits variable depositional sequence is (Ag-Co-Cr-Ni-Cu-As-Pb-Zn). With regard to position of the ore metals in the general sequence of zoning, the gold potential of the central and southeastern parts, due to its probable accumulation at deeper levels of the mineralization, are expected to be promising. Drilling is recommended for studying the vertical zoning of these elements to reveal the site of gold accumulation.
Highlights
The Egyptian Eastern Desert is one of the largest gold provinces in the world where more than 96 gold deposits and occurrences are recorded
El-Daghbag-I gold mineralization is a part of El-Daghbag gold deposit, Central Eastern Desert, Egypt
Drilling is recommended for studying the vertical zoning of these elements to reveal the site of gold accumulation
Summary
The Egyptian Eastern Desert is one of the largest gold provinces in the world where more than 96 gold deposits and occurrences are recorded. Gold mineralization in the Eastern Desert of Egypt is almost confined to the gold-bearing quartz veins and the associated alteration zones within ophiolitic and island-arc igneous and metamorphic rocks of the Arabian Nubian Shield ([1]-[6]). Numerous geological and geochemical data on the gold mineralization in the Eastern Desert were obtained Wadi El-Daghbag area lies in the central part of the Nubian Shield, Eastern Desert of Egypt between latitudes 25 ̊20' and 25 ̊26'N, and longitudes 33 ̊47' and 33 ̊54'E (Figure 1). El-Daghbag gold mine witnessed extensive ancient mining of gold-bearing quartz veins. Ptolemaic Period beneficiation and extraction of gold are supported by the abundant tools in Wadi El-Daghbag [21]
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