Host: Abstracts of Annual Meeting of the Geochemical Society of Japan
Pages 281-
Oxygen and sulfur isotope ratios were measured for sulfate ion in monthly precipitation at 6 sampling points in Chugoku district. Three groups are identified from oxygen and sulfur isotope ratios of nss sulfate ion. They are group A (high sulfur isotope ratio group in winter, which is affected by coal combustion in China), group B (low sulfur isotope ratio group in summer, which is mainly affected by oil combustion in Japan), and group C (medium sulfur isotope ratio and high oxygen isotope ratio group in spring). nss-Sr isotope ratio of group C is highest among three groups, which indicates group C is affected by dissolved component of yellow sand. It suggests that sulfate ion in group C is also affected by dissolved component of yellow sand. Measurement of oxygen isotope ratio of yellow sand is necessary to prove this hypothesis.
