| 河北平原地下水氦氩同位素特征 |
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| 引用本文：刘存富,晁念英,王佩仪,甘义群,李延河,宋鹤彬.2005.河北平原地下水氦氩同位素特征[J].地球学报,26(z1):268-271. |
| DOI：10.3975/cagsb.2005.s1.88 |
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| 中文摘要:通过对河北平原地下水氦同位素进行分析比较，根据过剩He(4He exc)、3He/4He比值、δ3He和36Ar/38Ar及40Ar/36Ar值分析认为，河北平源地下水氦氩同位素有7个特征；①地下水中过剩He浓度沿地下水的流向而增高；②地下水中过剩He浓度随着地下水埋深加大而增高；③满城-沧州剖面上过剩He浓度大于石家庄-衡水剖面上的过剩He浓度；④河北平原地下水主要是由大气隆重水补给的；⑤衡水热水过剩He浓度很高（>674.83×10-8cm3STPg-1水）；⑥地下水的36Ar/38Ar比值平均值为5.37，非常接近地球大气的比值（5.35）；⑦地下水的40Ar/36Ar比值从296-412，均比大气氩的40Ar/36Ar比值（295.6）大，这表明40Ar都是放射成因的，且具有“年代积累效应”。 |
| 中文关键词:氦同位素 氩同位素 地下水 河北平源 |
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| Helium and Argon Isotope Characteristics of Groundwater in Hebei Plain |
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| Abstract:In this paper, the helium and grgon isotopes of groundwater in Hebei plain are analyzed. According to "excess helium"(4He exc),3He/4He ratios, δ3He value, 38Ar/36Ar and 40Ar/36Ar ratios, the helium and grgon isotopes of groundwater in Hebei plain show seven characteristics:①The concentrations of "excess helium" in groundwater increase in the flow diroction of groundwater;②The concentrations of "excess helium" in groundwater increase with the depth of groundwater;③The concentrations of "excess helium" of the hydrogeological profiles in Mancheng-Cangzhou are higher than those in Shijiazhuang-Hengshui;④The groundwater in Hebei plain is recharged from the precipitations.⑤The thermal groundwater in Hengshui shows higher concentration of "excess heli-un(674.83×10-8cm3 STPg-1)".⑥The 36Ar/38Ar ration of groundwater is 5.37m which approximates to the value of air over the earth (5.35).⑦40Ar/36Ar ratios of groundwater are from 296 to 412, which are highrer than the 40Ar/36Ar ration of air grgon over the earth (=295.6).It is shown that 40Ar in groundwater is radiogenic and that 40Ar/has "the effect of age accumulation". |
| keywords:helium isotope argon isotope groundwater Hebei plain |
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