地质学报（英文版）2009，Vol.83Issue(1)：103-113,11.
Oxygen and Hydrogen Isotopes of Waters in the Ordos Basin,China: Implications for Recharge of Groundwater in the North of Cretaceous Groundwater Basin
Oxygen and Hydrogen Isotopes of Waters in the Ordos Basin,China: Implications for Recharge of Groundwater in the North of Cretaceous Groundwater Basin
摘要
Abstract
Hundreds of precipitation samples collected from meteorological stations in the Ordos Basin from January 1988 to December 2005 were used to set up a local meteoric water line and to calculate weighted average isotopic compositions of modern precipitation.Oxygen and hydrogen isotopes, with and gradually decrease in summer and fall,illustrating that the seasonal effect is considerable.They also show that the isotopic difference between south portion and north portion of the Ordos Basin are not obvious.and the isotope in the middle portion iS normally depleted.The isotope compositions of 32 samples collected from shallow groundwater(less than a depth of 150 m)in desert plateau range from for JD.Most of them are identical with modern precipitation.The isotope compositions of 22 middle and deep groundwaters(greater than a depth of 275 m)fall in ranges from-11.6‰to-8.8‰with an average of-10.2‰ for ￡18O and from-89‰ to-63‰ with an average of-76‰ for ￡D.The average values are significantly less than those of modern precipitation,illustrating that the middle and deep groundwaters were recharged at comparatively lower air temperatures.Primary analysis of 14C shows that the recharge of the middle and deep groundwaters started at late Pleistocene.The isotopes of 13 lake water samples collected from eight lakes define a local evaporation trend,with a relatively flat slope of 3.77,and show that the lake waters were mainly fed by modern precipitation and shallow groundwater.关键词
groundwater/lake water/oxygen and hydrogen isotopes/precipitation/Ordos BasinKey words
groundwater/lake water/oxygen and hydrogen isotopes/precipitation/Ordos Basin分类
天文与地球科学引用本文复制引用
YANG Yuncheng,SHEN Zhaoli,WENG Dongguang,HOU Guangcai,ZHAO Zhenhong,WANG Dong,PANG Zhonghe..Oxygen and Hydrogen Isotopes of Waters in the Ordos Basin,China: Implications for Recharge of Groundwater in the North of Cretaceous Groundwater Basin[J].地质学报（英文版）,2009,83(1):103-113,11.基金项目
This research was financially supported by the China Geological Survey and International Atomic Energy Agency. （）
