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

Mohamed El Tokhi, Abdalla El Muslem

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

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 languageEnglish
Pages (from-to)131-139
Number of pages9
JournalChinese Journal of Geochemistry
Volume21
Issue number2
DOIs
Publication statusPublished - 2002
Externally publishedYes

Keywords

  • Eastern Desert of Egypt
  • Fluid inclusion
  • Gold-bearing quartz vein

ASJC Scopus subject areas

  • Geochemistry and Petrology

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