[HTT18-P08] Sulfur and oxygen isotopic ratios of sulfate in precipitation at Chugoku region and Chinese desert sand
Keywords:sulfur and oxygen isotopic ratio, sulfate in precipitation, Chinese desert sand
group B(δ18O=+7.0‰, δ34S=-1.1‰) which has low δ34S mainly affected by domestic oil combustion in summer, and group C which has high δ18O (δ18O=+17.0‰, δ34S=+4.0‰) observed in spring. Oxygen isotope ratio of non-sea-salt sulfate varies simultaneously with non-sea-salt Sr isotope ratio. Group C may be affected by the component related to the yellow sand, because non-sea-salt Sr isotope ratio becomes high at yellow sand event. Sulfur and oxygen isotope ratios of 11 desert sand samples were measured. Sulfur isotope ratios of desert sand samples range from +4.8 to +11.2‰, and oxygen isotope ratios from -3.7 to +14.0‰. These results do not agree with isotope ratio of group C. Thus, source material of yellow sand may not be directly related to the source material of group C. Further investigation is required to specify the source material of group C.