Geochemical Exploration of Copper Mineralization at South of Gabal Um Monqul area, North Eastern Desert, Egypt. | ||||
| Egyptian Journal of Geology | ||||
| Volume 69, Issue 1, 2025, Page 127-146 PDF (3.3 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/egjg.2025.356087.1102 | ||||
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| Authors | ||||
Attia Rabie  1; M. A. Wahab Gaber2; Taher M Shahin3; Ashraf Emam4; Mahmoud Mohamed Hassaan1
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| 1Geology Department, Faculty of Science, Al-Azhar University. | ||||
| 2Egyptian Petroleum Research Institute, Cairo, Egypt. | ||||
| 3Geology Department, Faculty of Science, Al-Azhar University, PO Box 11884, Nasr City, Cairo, Egypt | ||||
| 4Faculty of Science, Aswan University , Aswan ,Egypt. | ||||
| Abstract | ||||
| The South of Gabal Um Monqul area, located in the Northern part of the Eastern Desert of Egypt, is known for Cu-Au mineralization. The rock units are metavolcanics, Dokhan volcanics, and monzogranite. Integrated field, remote sensing, microscopical, and geochemical studies are fulfilled to identify structures, lithological units, hydrothermal alteration zones, and genesis of mineralization. The metavolcanics are metabasalt and meta-andesite. The Dokhan volcanics are represented by andesite and dacite which display fine and porphyritic textures. The monzogranite mainly consists of quartz, plagioclase, orthoclase, and biotite. The remotely sensed data identified the main trends of lineaments, which are NE and NW trend. For the lithological, hydrothermal alteration mapping, the optimum index factor, false color composite, and band ratios techniques effectively distinguish the rock units and identified the alteration types such as argillic, phyllic, and propylitic types. Geochemically, the monzogranites, intermediate metavolcanics and Dokhan volcanics samples showing calc alkaline while basic metavolcanics showing tholeiitic field. The geochemical patterns and factors distinguished between two fields of ore elements pointing to the presence of these metals more than one phase e.g. sulphides, oxides and silicates. Cu is the chief ore element in metavolcanics; Pb and Mo are the main associated elements, while Ba is the associated element. In the monzogranite, the Cu also is the chief ore element. The primary ore minerals are chalcopyrite, pyrite, magnetite, hematite, titanomagnetite, and ilmenite. Other recorded minerals are barite, chromite, monazite, thorite, molybdenite, and Cd-Se minerals. On the other hand, malachite, chrysocolla, atacamite, and goethite are secondary associations. | ||||
| Keywords | ||||
| Copper mineralization; Remote sensing; Um Monqul; Geochemical Exploration | ||||
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