岡山県下の天水の水素及び酸素同位体比;岡山県下の天水の水素及び酸素同位体比;Hydrogen and Oxygen Isotope Ratios of Meteoric Waters in Okayama Prefecture, Japan
岡山県下の天水の水素及び酸素同位体比;岡山県下の天水の水素及び酸素同位体比;Hydrogen and Oxygen Isotope Ratios of Meteoric Waters in Okayama Prefecture, Japan
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日本冈山县大气水的氢和氧同位素比
DOI：
10.5917/jagh1987.35.107
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Minoru Kusakabe
中科院分区：
文献类型：
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作者：
Masahiro Yamamoto;Toshihiro Kitamura;S. Akagi;Takafumi Furukawa;Minoru Kusakabe
报告了 1990 年至 1992 年收集的冈山县大气水的氢和氧同位素比。冈山市冈山大学收集的 8 天和 8 180 降水值分别在 +20.0 至 —123.0%0 和 0.0 至 —17.0%0 范围内变化。雨季（6月和7月）降水量7 D和8 180值明显低于其他季节。 1991年7月至1992年6月一年的加权平均值为7 D= —53.0%0 和8 1.80 = — 8 。 P/00 的 d 参数为 11.8%o。河水 8 D 和 8 180 值均一，范围分别为 —47.8 至 —58.7%0 和 —7.9 至 —9.1%0，平均 8 D 值为 —51.9%0，8 180 值为 —8.6%0，d 参数为 16.9%o，这表明冈山县河水正好位于日本的大气水位线上。平均降水量与平均河水 d 参数之间的差异可能是由于冈山县北部高 d 参数降水对河水贡献显着。大多数井水与日本的大气水线存在偏差，表明蒸发过程中存在动力同位素效应。汤原温泉水的 8 D 和 8 180 值与附近的旭川河水相同。
Hydrogen and oxygen isotope ratios of meteoric waters in Okayama Prefecture collected in 1990 to 1992 are reported. The 8 D and 8 180 values of precipitation collected at Okayama University, Okayama City, vary in the wide ranges from +20.0 to —123.0%0 and from 0.0 to —17.0%0, respectively. Precipitation in the rainy season (June and July) has distinctly lower 7 D and 8 180 values than in the other seasons. The weighted averages for a year from July, 1991 to June, 1992 are 7 D= —53.0%0 and 8 1.80 = — 8 . P/00 with a d parameter of 11.8%o. River waters are uniform both in 8 D and 8 180 values and they range from —47.8 to —58.7%0 and —7.9 to —9.1%0, respectively, with the average 8 D value of —51.9%0, 8 180 value of —8.6%0 and d parameter of 16.9%o, which indicates the river waters of Okayama Prefecture are just on the meteoric water line of Japan. The difference in d parameter between the average precipitation and the average river water may be explained by significant contribution of precipitation with high d parameters in northern Okayama Prefecture to the river waters. Most well waters show deviations from the meteoric water line of Japan, indicating kinetic isotope effects during evaporation. The Yubara hot spring waters have the same 8 D and 8 180 values to the nearby Asahigawa river water.