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العنوان
Lithology and petrogenesis of Late Neoproterozoic rocks of Gabal Umm Anab area, North Eastern Desert, Egypt /
المؤلف
Fayed, Sara Ahmed Talha.
هيئة الاعداد
باحث / سارة أحمد طلحة فايد
مشرف / خالد جمال خالد الجميل
مشرف / حمدي احمد الدسوقي
مناقش / على فراج سيد عثمان
مناقش / شيحته السيد عبد الله عبد المجيد
الموضوع
geology. GEOMORPHOLOGY.
تاريخ النشر
2024.
عدد الصفحات
145 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الجيولوجيا
تاريخ الإجازة
16/7/2024
مكان الإجازة
جامعة المنوفية - كلية العلوم - الجيولوجيا
الفهرس
Only 14 pages are availabe for public view

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from 145

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.