Oxygen and sulfur isotopic compositions of quartz, barite and sulfide minerals from the Sambo Pb-Zn-barite ore deposits, South Korea.

Abstract

The results are as follows: (1) The 8345 values of sulfides vary from -3.9 to -13.5%o and those of sulfates from +15.7 to +17.2%0. Isotopic temperatures from barite-sphalerite and barite-galena pairs were 210-290°C, in fairly good agreement with the homogenization temperatures of fluid inclusions in the stage II quartz. At relatively low temperatures (210-290°C), isotopic equilibria were attained between sulfate and sulfide minerals in the Sambo ore deposits. (2) Barites have homogeneous 834S and 8180 val ues of +15.7 to +17.2%o and +2.4 to +3.9%o, respectively.Calculated 8180 values of ore fluids in equilibrium with barite and quartz vary from -2.1 to +0.9%o and -4.2 to -1.3%o, respectively, suggesting a contribution of 180 depleted meteoric water to ore fluids of the Sambo deposits.