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Geochemical and isotopic characteristics of shallow groundwater within the Lake Qinghai catchment, NE Tibetan Plateau
Xiao, J (Xiao, Jun)[ 1 ]; Jin, ZD (Jin, Zhangdong)[ 1 ]; Zhang, F (Zhang, Fei)[ 1 ]
2013-11-05
发表期刊QUATERNARY INTERNATIONAL
卷号313-314页码:62-73
文章类型期刊论文
摘要

Major ions, isotopic ratios of strontium (Sr-87/Sr-86), hydrogen (delta D) and oxygen (delta O-18) of groundwater samples were analyzed to decipher spatial variation, controlling factors, solute sources, and the recharge source of shallow groundwaters within the Lake Qinghai catchment. Shallow groundwaters in this area are slightly alkaline, with 97% being fresh water of good quality, though there are high concentrations of nitrate and sulfide in Buha and lakeside groundwaters. Most of the shallow groundwaters are of the Ca2+-HCO3- type, whereas part of groundwaters surrounding the lake (LS) belongs to the Na+-Cl- type as lake water (QHL). Groundwater geochemistry is controlled by regional lithological association, ion exchange, and mineral precipitation. The dissolved Sr concentrations and Sr-87/Sr-86 ratios vary from 1.0 to 15.6 mu mol/L, and from 0.709859 to 0.715779, respectively. The first quantitative calculation in groundwater using a forward model shows that 40% of dissolved Sr is from carbonate weathering, 33% from evaporite dissolution, 17% from silicate weathering, and the remainder from atmospheric input for the whole catchment. Carbonate weathering dominates groundwater geochemistry in Shaliu (SL), Hargai (HG) and Buha (BR) samples, while evaporite dissolution dominates LS and Daotang (DT) samples. delta D and delta O-18 data show that rain water is the major recharge source of both river water and shallow groundwater within the Lake Qinghai catchment. Qinghai Lake water is characterized by Buha-type water, but its Sr geochemistry is different from the shallow groundwater due to carbonate precipitation. Although shallow groundwater contributes similar to 5% of the dissolved Sr to the QHL, groundwater must be taken into account when the chemistry and budget of lake water are characterized.

DOI10.1016/j.quaint.2013.05.033
收录类别SCI ; EI
语种英语
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10018
专题加速器质谱中心
通讯作者Jin, ZD (Jin, Zhangdong)[ 1 ]
作者单位State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, 10 Fenghui South Road,Xi’an High-Tech Zone, Xi’an 710075, China
推荐引用方式
GB/T 7714
Xiao, J ,Jin, ZD ,Zhang, F . Geochemical and isotopic characteristics of shallow groundwater within the Lake Qinghai catchment, NE Tibetan Plateau[J]. QUATERNARY INTERNATIONAL,2013,313-314:62-73.
APA Xiao, J ,Jin, ZD ,&Zhang, F .(2013).Geochemical and isotopic characteristics of shallow groundwater within the Lake Qinghai catchment, NE Tibetan Plateau.QUATERNARY INTERNATIONAL,313-314,62-73.
MLA Xiao, J ,et al."Geochemical and isotopic characteristics of shallow groundwater within the Lake Qinghai catchment, NE Tibetan Plateau".QUATERNARY INTERNATIONAL 313-314(2013):62-73.
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