Petrological and mineralogical characterization of Wadi Ghadir pegmatite, southern Eastern Desert, Egypt. | ||||
| Frontiers in Scientific Research and Technology | ||||
| Volume 6, Issue 1, August 2023 PDF (2.39 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/fsrt.2023.221514.1096 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Waheed Elwan   1; Ahmed M. Dardier2; Mohamed Shehata3; Emad Khalil3; Hader Sobhy3; Fares Khedr4
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| 1Department of Geology, Faculty of Science, Zagazig University | ||||
| 2Nuclear Material Authority, Maadi, Cairo, Egypt | ||||
| 3Geology Department, Faculty of Science, Zagazig University, Zagazig-44519, Egypt | ||||
| 4Department of Geology, Faculty of Science, Suez University, Suez,43518, Egypt | ||||
| Abstract | ||||
| Wadi Ghadir pegmatite bodies are represented by two bodies (large and small), which crossed by latitude 24°48'28.83"N and longitude 34°52'38.43"E, and latitude 24°48'25.75"N and longitude 34°52'46.65"E respectively. They are hosted by monzogranites. They consist of a) wall zone in the form of thin and discontinuous, b) the intermediate zone is mainly composed of K-feldspars. It shows sharp contact with wall zone and gradational contact with core zone and c) quartz core which encloses isolated flakes of muscovite. The separated heavy minerals from these pegmatites include magnetite, garnet, zircon, rutile, monazite, uranothorite and gold element. The presence of garnets could be attributed either to the assimilation from country rocks or to crystallization from volatile-rich magma. Gold is restricted to the associated quartz-veins; this may refer to relation of gold to the monzogranites. Fluid inclusions are mainly represented by primary two-phases and two generations secondary inclusions. The early fluid generation is higher in temperature and salinity relative to the late one. The calculated conditions of trapping at temperature 360oC, and pressure up to 2585 bars for the early generation, and 170oC, 139oC for the late. The trapping conditions for immiscible fluids that of H2O - and CO2-rich inclusions are temperatures range (170 – 400 °C) and pressures (900-2,000 bars). As a result of investigation of chemical composition for K-feldspar samples and performed physical parameters tests, the studied pegmatites fit well of wall rather than floor ceramic tiles. The nature of magma indicate that these pegmatites were formed from a residual granitic melt. | ||||
| Keywords | ||||
| Pegmatite; Eastern Desert; Fluid inclusions; Wadi Ghadir; Heavy minerals | ||||
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