The amounts of strontium and calcium in the lead-bearing barite from hydro thermal solution were found to increase with the lead content of the barite. This fact suggests that the difference between DM _ [M/Pb]PbSO4 and DM = [M/Ba]Baso4 PbSO4 [M/Pb]aq BaSO4 [M/Ba]aq primarily contributes to the increment of both trace elements in the barite, where DMPbs0 4 and DM04 represent the distribution coefficients of M which refers to stron tium or calcium; [M/Pb] and [M/Ba] indicate the M-lead and M-barium weight ratios, respectively, in sulfate and aqueous solution.