Chinese Journal of Geochemistry

, Volume 21, Issue 2, pp 131–139 | Cite as

Fluid inclusions in the gold-bearing quartz veins at Um Rus area, Eastern Desert, Egypt

  • Mohamed El Tokhi
  • Abdalla El Muslem


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.

Key words

fluid inclusion gold-bearing quartz vein Eastern Desert of Egypt 


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Copyright information

© Science Press 2002

Authors and Affiliations

  • Mohamed El Tokhi
    • 1
  • Abdalla El Muslem
    • 2
  1. 1.Geology Department, Faculty of ScienceMansoura UniversityDamiettaEgypt
  2. 2.Geology Department Faculty of ScienceUnited Arab Emirates UniversityAl AinUnited Arab Emirates

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