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鄂尔多斯盆地大气降雨氢氧同位素的组成与季节效应
Hydrogen-Oxygen Isotope Composition of Precipitation and Seasonal Effects on δ 18O of Precipitation in Ordos Basin
【Author】 YANG Yuncheng~1) HOU Guangcai~1) WEN Dongguang~1) PANG Zhonghe~3) WANG Dong~1) 1)Xi’an Institute of Geology and Mineral Resources,Xi’an,Shaanxi,710054;2)China Geological Survey,Beijing,100011;3)International Atomic Energy Agency,Vienna,Austria
【机构】 西安地质矿产研究所； 中国地质调查局； International Atomic Energy Agency,Vienna,Austria；
【摘要】 通过对鄂尔多斯盆地雨水同位素的分析,建立了盆地雨水线方程,计算出雨水氢氧同位素的加权平均值,为开展鄂尔多斯盆地地下水氢氧同位素的研究提供了依据;分析了雨水δ18O 与气温、降雨量和季节的变化关系,总结出鄂尔多斯盆地冬季雨水δ18O 较低,春季雨水δ18O 较高,夏季雨水δ18O 亏损的特点,得出雨水来源和形成温度是鄂尔多斯盆地雨水同位素组成随季节变化根本原因的结论。
【Abstract】 The local meteoric water line is set up on the basis of analyzing the precipitation isotopes in Ordos basin,and the averageprecipitation isotope composition is figured out.The basis is provided for the research of hydrogen and oxygen isotopes in groundwaterof Ordos basin.The relationships between the rainfall δ18O,the temperature and the amount of rainfall and the seasonal change areanalyzed,It is concluded that the rainfall δ18O in winter is lower than that in summer,that the rainfallδ18O in spring is the highest,and that the rainfallδ18O in summer is depleted.The reasons for the change of rainfallδ18O with the season in Ordos basin are putforward.
- 【会议录名称】 第八届全国同位素地质年代学和同位素地球化学学术讨论会论文集
- 【会议名称】第八届全国同位素地质年代学和同位素地球化学学术讨论会
- 【会议时间】2005-09
- 【会议地点】中国北京
- 【分类号】P641.3
- 【主办单位】中国地质学会同位素地质专业委员会、中国矿物岩石地球化学学会同位素地球化学专业委员会、国土资源部同位素地质重点实验室、南京大学内生金属成矿机制研究国家重点实验室