Abstract
Fluid inclusions in the gold-bearing quartz veins at the Um Rus area are of three types: H2O, H2O-CO2 and CO2 inclusions. H2O inclusions are the most abundant, they include two phases which exhibit low and high homogenization temperatures ranging from 150 to 200°C and 175 to 250°C, respectively. The salinity of aqueous inclusions, based on ice melting, varies between 6.1 and 8 equiv. wt% NaCl. On the other hand, H2O-CO2 fluid inclusions include three phases. Their total homogenization temperatures range from 270 to 325°C, and their salinity, based on clathrate melting, ranges between 0.8 and 3.8 equiv. wt% NaCl. CO2 fluid inclusions homogenize to a liquid phase and exhibit a low density range from 0.52 to 0.66 g/cm3. The partial mixing of H2O-CO2 and salt H2O-NaCl fluid inclusions is the main source of fluids from which the other types of inclusions were derived. The gold-bearing quartz veins are believed to be of medium temperature hydrothermal convective origin.
Original language | English |
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Pages (from-to) | 131-139 |
Number of pages | 9 |
Journal | Chinese Journal of Geochemistry |
Volume | 21 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2002 |
Externally published | Yes |
Keywords
- Eastern Desert of Egypt
- Fluid inclusion
- Gold-bearing quartz vein
ASJC Scopus subject areas
- Geochemistry and Petrology