الفهرس | Only 14 pages are availabe for public view |
Abstract Umm Anab region is situated southwest of Hurghada city in the Red Sea Governorate spanning approximately 350 km2. It is characterized by rugged terrain and semi-arid conditions. Methodological approaches encompassed fieldwork, laboratory analyses, remote sensing, and geospatial technologies, facilitating comprehensive data collection and analysis. The field study delves into the geological setting, highlighting metavolcanics, Older and Younger granitic plutons, and structural features such as folds and faults. Finite-strain and paleostress analysis techniques were elucidated shedding light on the deformation history of rocks in the study area. The analysis revealed finite strain values ranging from 1.23 to 1.73 for deformed metavolcanic rocks, with consistent results across different methods. Paleostress analysis identified two distinct stress regimes, suggesting a complex tectonic history. Petrographic study exposed the mineralogical composition and textures of various rock units, aiding in deciphering their geological significance. Metavolcanics exhibited a variety of textures and compositions, including amphibolites, meta-andesites, and metarhyolites. Granitoid rocks were classified into several types based on mineral composition and texture, providing insights into their formation processes and geological context. The granitoids include quartz diorite, tonalite-granodiorite, monzogranite and alkali feldspar granite. The geochemical characteristics of Late Neoproterozoic rocks employ classification methods and petrogenesis studies to discern magma types and tectonic settings. Geochemical analysis revealed sub-alkaline composition for most granite samples, with variations indicating different geological environments. Petrogenesis studies suggested partial melting of tonalite as the likely source for the studied granites, consistent with crustal-derived magma in a post-orogenic setting. |