Rb-Sr Isotope Dating of Bauxite Deposits in Shanxi Province
山西铝土矿Rb-Sr同位素定年

The authors determined Rb-Sr isotope ages and initial 87Sr/ 86Sr ratios of three bauxite whole rock and clay mineral samples from Wutai(RS01), Linxian(RS02) and Xiaoyi (RS03)in Shanxi Province. They are 316.9±1.2 Ma and 0.71054±14, 315.5±1.3 Ma and 0.71086±18, and 317.3±1.1 Ma and 0.71050±14, respectively. These ages indicate that the bauxite and the ore-hosting sedimentary sequence in Shanxi Province were deposited in the time interval between 315 Ma and 317 Ma, corresponding to the Late Carboniferous Epoch.