| 广州珠江三角洲海水入侵地区地下水微粒的TEM分析及意义 |
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| 引用本文： | 易泽邦,刘千红,曹建劲,赖佩欣,彭益军,张剑,宾岚.广州珠江三角洲海水入侵地区地下水微粒的TEM分析及意义[J].地质科技通报,2015,34(4):194-199. |
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| 作者姓名： | 易泽邦 刘千红 曹建劲 赖佩欣 彭益军 张剑 宾岚 |
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| 作者单位： | 1. 中山大学地球科学与地质工程学院, 广州 510275; |
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| 基金项目： | 广州市地下水动态监项目“广州市地下水海(咸)水入侵研究”(20123211071010326) |
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| 摘 要： | 广州地区地下水咸化现象由来已久,通过透射电子显微镜对广州珠江三角洲地下水的咸化原因进行了研究,并评价了其咸化程度。通过研究广州地区地下水中的微粒特征,包括观察微粒的形貌、结晶程度和化学成分等特征,同时对比现代海水微粒特征,讨论了微粒特征用于地下水咸化原因探究和评价的可行性。研究发现,在咸化程度不同的样品中,微粒中Cl含量不同,没有咸化的样品中难以找到Cl元素,咸化程度越高,微粒中Cl含量可以越高。同时,在受到海水入侵的地下水微粒中发现了具有海洋来源含Sr、Ba等微量元素的微粒,这些微量元素在一定程度上可视为海水的示踪剂,说明该组地下水受到了不同程度的海水浸染。通过透射电子显微镜分析研究了地下水中的微粒,结果表明,该研究区地下水中的微粒继承了海水中的微粒特征,广州市地下水的咸化是由于海水入侵所致,因此,利用微粒特征用于海水入侵的判别分析和评价是可行的。类似地,该方法同样可用于水污染调查以及地下水找矿研究。
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| 关 键 词： | 地下水 微粒特征 海水入侵 透射电子显微镜 |
| 收稿时间： | 2014-08-02 |
TEM Analysis of Seawater Intrusion of Groundwater Particles in Pearl River Delta,Guangzhou |
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| Institution: | 1. Department of Earth Sciences, Sun Yat-sen University, Guangzhou 510275, China;2. Guangdong Key Laboratory of Geological Process and Mineral Resources Exploration, Sun Yat-sen University, Guangzhou 510275, China;3. The Geological Survey Institute of Guangzhou, Guangzhou 510275, China |
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| Abstract: | The groundwater salinization has been a long time problem in Guangzhou region.This paper uses transmission electron microscopy(TEM)to explore the reason of groundwater salinization and to evaluate the salinization degree.This paper mainly observes the morphology of the groundwater particles and the degree of crystallization,structure and chemical composition to summary and conclude the particles characteristics,and then,the particles characteristics of groundwater are compared with the particles characteristics of seawater.At the end,this paper discusses the feasibility of application of particles characteristics on the salinization reason detection and evaluation.The results show that the Cl value in different particles is different in different salinization degree samples,and the higher salinization degree the higher the Cl value in the particles.Meanwhile,Sr,Ba elements in the groundwater particles are observed from the saline groundwater samples which is regarded as a tracer of ocean water.It means that the group of groundwater has disseminated by seawater in different degree.The results indicate that the groundwater particles of the study area inherit the particulate characteristics of ocean water particles.The reason of Guangzhou groundwater salinization is due to seawater intrusion.Therefore analysis and evaluation seawater intrusion via particles characteristics analysis is feasible.Similarly,this method also can be used for water pollution investigation and study of groundwater prospecting. |
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