| 河北平原地下水锶同位素特征 |
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| 引用本文：周爱国,甘义群,刘存富,蔡鹤生.2005.河北平原地下水锶同位素特征[J].地球学报,26(z1):279-282. |
| DOI：10.3975/cagsb.2005.s1.91 |
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| 中文摘要:本文根据28个样品的测试结果，介绍了河北平原地下水的87Sr/86Sr比值。水的87Sr/86Sr比值变化很大。这些Sr同位素组成的差别反映了平原中水流受区域地质条件控制。文中讨论了Sr同位素的6个分布特征。河北平原地下水的87Sr/86Sr比值均大于现代海水的平均值（0.709073）。平原内第四系地下水（Q4-Q1）从补给区到排泄区的87Sr/86Sr比值随着距离（年龄）增大而系统增大。水文学上年轻的水显示非放射性成因的（初始的）87Sr/86Sr比值，而较老的水则具有明显的放射成因，可达0.71527(δ87Sr为8.74‰)这很可能是通过溶解含水层硅酸盐而增加大陆Sr的结果。 |
| 中文关键词:87Sr/86Sr 地下水 河北平原 |
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| Sr Isotope Characteristics of Groundwater in Hebei Plain |
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| Abstract:87Sr/86Sr ratios of 28 groundwater samples from an aquifer in Hebei plain are presented in this paper. The water exhibits highly variable 87Sr/86Sr ratios. The difference in Sr isotope composition reflects the regional geological control of water flow in the plain.Six distribution characteristics of Sr isotopes in groundwater are discussed. The 87Sr/86Sr ratios of groundwater in Hebei plain are higher than the ratio of modern mean sea water (87Sr/86Sr=0.709073).The groundwater from Quaternary sediments (Q4-Q1)in the plain shows a systematic increase in 87Sr/86Sr ratuib wutg tge ubcreasubg dustabce abd age frin tge recgarge area ti tge duscgarge area if tge okaub.Hydrological young water exhibits unradiogenic (initial)87Sr/86Sr ratios, whereas older water is significantly more radiogenic, with the 87Sr/86Sr ratio rising to 0.71527 (δ87Sr=8.74‰).This possibly results from the addition of continental Sr through dissolution of aquifer silicates. |
| keywords:87Sr/86Sr groundwater Hebei plain |
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