| 重庆歌乐山隧址区地下水同位素组成特征及意义 |
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| 引用本文： | 赵金凤,夏克勤,石豫川,孙晋玉.重庆歌乐山隧址区地下水同位素组成特征及意义[J].中国地质灾害与防治学报,2004,15(2):94-97. |
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| 作者姓名： | 赵金凤 夏克勤 石豫川 孙晋玉 |
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| 作者单位： | 成都理工大学,环境与土木工程学院,四川,成都,610059 |
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| 摘 要： | 同位素测试作为一种先进的技术手段在地质科学的各个研究领域得到越来越广泛地应用。运用同位素方法研究流体及矿床成因关系方面取得了较大的进展。目前，环境同位素方法被广泛用于识别地下水系统，研究自然界水循环过程和地下水运动规律。不同成因的地下水具有不同的同位素组成特征，而且氢、氧稳定同位素在低温条件下不与围岩发生同位素交换，放射性同位素变化遵循各自的衰变规律，水中HCO3碳、氧同位素组成与被溶解的碳酸盐岩同位素组成有关。在歌乐山隧道施工涌水对周边地下水系统的影响及环境效应评价过程中，取得许多同位素数据，对该区地下水的同位素特征有了新的认识。文章借助同位素方法探讨了隧址区地下水的补给源、年龄等基本特征。该区地下水主要补给来源为大气降水。碳、氧稳定同位素的研究结果也证实了这一点。对放射性同位素氚研究表明，该区地下水年龄基本都较小，属近期大气降水直接渗入补给。
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| 关 键 词： | 环境同位素 地下水年龄 地下水补给 重庆歌乐山 |
| 文章编号： | 1003-8035(2004)02-094-04 |
| 修稿时间： | 2003年6月22日 |
sotope component characteristics of goundwater of Geleshan Tunnal'Chongqin |
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| ZHAO Jin-feng,XIA Ke-qin,SHI Yu-chuan,SUN Jin-yu.sotope component characteristics of goundwater of Geleshan Tunnal''''Chongqin[J].The Chinese Journal of Geological Hazard and Control,2004,15(2):94-97. |
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| Authors: | ZHAO Jin-feng XIA Ke-qin SHI Yu-chuan SUN Jin-yu |
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| Abstract: | As an advanced technical measure. the testing of isotopes is used broadly more and more in various study fields of geology science. The study on the relation of liquid to the cause of formation of deposit has been obtained achievement by using isotope method. At prescnt, cnvironmental isotope method has been extensively used in identifying groundwater system to study the water circle process and movement rule of groundwater. Groundwater with different formation cause has different component characters. And hydrogen and oxygen stable isotopes do not exchange with surrounding rock. The changes of radioactive isotope follow its own disintegration rule. And carbon and oxygen isotopes of HCO~-_3 in groundwater are related with isotopc component of dissolved carbonate rock. The authors study the infection of groundwater system around and environment effect estimation by water outburst through Geleshan tunnel and get many data of isotopes and gain a new opinion about isotopes character of groundwater in this area. This paper discusses the basic characters of groundwater of tunnel area with isotope method, such as the source of groundnater replenishment, groundwater age. In the study of hydrogen and oxygen stable isotopes, the results of samples are reflected in fig 2. We can see that almost all results of samples' isotopes component accord with precipitation line. So, we can infer the source of replenishment of groundwater is atmosphere precipitation in this area. And it can be approved from the study of carbon and oxygen stable isotopes too. The study of radioactive isotope indicates the age of the groundwater almost younger. Thus it was replenished directly by atmosphere precipitation lately. |
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| Keywords: | environmental isotope groundwater age replenishment of groundwater Geleshan Chongqing |
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