الفهرس 
ACKNOWLEDGEMENTS
Geological and structural setting of El-Barramiya gold depositOnly 14 pages are availabe for public view
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Abstract
The present study deals with the geological and geophysical studies of El-Barramiya area between longitudes 33° 45 ′ E and 33° 55 ′ E and latitudes 25°00′ N and 25° 10′ N with focusing on the gold mine area (33° 47′ E and 25° 04′ . Geological and structural setting, petrography, fluid inclusions and geochemistry of alteration and mineralized veins were carried out to determine the genesis of gold mineralization. Geophysical studies are including magnetic and gravity studies to delineate the surface and subsurface structures and shear zones which control gold mineralization. The study revealed the following: 1. El – Barramiya gold deposit is located in a region of strongly ENE-trending sheared ophiolitic rocks and is hosted by an ophiolitic melange composed of allochthonous blocks of serpentinite and listvenite structurally intercalated with metasedimentary and volcano-sedimentary rocks. 2. The metamorphism in the study area was reached at the greenschist–amphibolite facies transition as indicated from the coexisting of chlorite and actinolite in the peak assemblage. 3. The study of structural setting, aeromagnetic and gravity data sets were integrated to determine the structural trends which control El-Barramiya area. The predominant tectonic trends are NW-SE, NE-SW, N-S, E-W, NNE-SSW and NEE-SWW. The mineralized veins are generally related to shear zone trending NEE-SWW and lies at the thrusting between serpentinites and metasediments. 4. The gold-bearing quartz (±carbonate) veins are spatially and temporally linked to a dextral shear system developed in the late stages of the deformation history of the area. The presence of massive to heavily asymmetric and deformed microstructures, dynamic recrystallization and slip on discrete carbonaceous lamina in the mineralized quartz veins point to vein formation under variable compressional and tensional regimes 5. A large volume of fluid is released by metamorphic reactions at the transition of green schist to amphibolite when hydrated sedimentary rocks (pelites) are buried following a P-T-t (pressure–temperature–time) typical of mountain belt evolution. 6. The ophiolitic rocks in the study area were subjected to carbonation and silicification metasomatic alterations. Progress of alteration led to the ormation of listvenite in the gold mine sheared area.