Abstract
This study aimed to spot more light on the nature of fluorite mineralized fluids and conditions of fluorite formation of these fluorites using the fluid inclusion studies. Fluorite vein-type mineralization at Egypt exists predominantly along faults, dissecting younger granitic plutons in the Arabian-Nubian shield (ANS). In Wadi Sodmein area fluorite hosted in pegmatitic veins dissecting the schists and metavolcanics. These veins are trending NE-SW and NW-SE in conformity with the general trend of faults dissecting the pegmatitic veins. The petrography of the fluid inclusions revealed primary and secondary fluid inclusions. Microthermometric investigation on the two-phase primary fluid inclusions specifies that the studied fluorites of Sodmein area were possibly deposited from low salinity (1.57–3.39 wt % NaCl eq.) aqueous fluids due to boiling processes and density ranging from 0.836 to 0.941 g/cm3. The trapping conditions of fluid inclusions in Sodmein fluorites estimated at temperatures between 140 °C and 240 °C, and pressures between 18 and 85 bars.
Published Version
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