The Wadi Sharis orogenic gold deposit in northwestern Yemen is related to the fault and shear zones vein at medium depth in the crust in the Neoproterozoic meta-sedimentary and meta-volcanosedimentary succession of greenschist to amphibolite facies metamorphism． Three distinct fluid inclusion types have been identified in the gold-bearing quartz sulphide veins of the deposit: ( 1) type I: vapour-liquid two-phase ( VH2O － LH2O ) ， ( 2) type II: three-phase CO2 ( VCO2 － LH2O － LCO2 ) and ( 3) type III: vapour-rich ( LCO2 － VCO2 ) inclusions． Six analysis of individual fluid inclusion indicate the fluid inclusions comprise mainly of H2O and CO2 ． Formation P-T conditions recorded by fluid inclusions in quartz crystals correspond to 180℃-380℃ and up to 130 MPa，as indicated by high-density CO2 bubbles ( up to 0. 98 g /cm3 ) observed in some inclusions． The estimated crystallization pressures correspond to approximately 4-10 km of overburden，assuming a lithostatic load． The salinity ranges from 0 to 22 wt%． The deposit holds at 0. 2-5 g /t Au and contains low-moderate salinity．