地学前缘 ›› 2016, Vol. 23 ›› Issue (3): 133-139.DOI: 10.13745/j.esf.2016.03.017

• 非主题来稿选登 • 上一篇    下一篇

宿南矿区地下水同位素地球化学特征及地质意义

桂和荣，陈松   

  1. 1. 宿州学院 资源与土木工程学院, 安徽 宿州 234000
    2. 国家煤矿水害防治工程技术中心, 安徽 宿州 234000
  • 收稿日期:2015-03-31 修回日期:2015-07-17 出版日期:2016-05-15 发布日期:2016-05-15
  • 作者简介:桂和荣（1963—），男，教授，博士生导师，主要从事水文地球化学方面的教学和科研工作。E-mail:herong_gui@163.com
  • 基金资助:

    国家自然科学基金项目(41373095，41173106);宿州学院创新团队项目(2013kjtd01)

Isotopic geochemical characteristics of groundwater and its geological significance in Sunan mining area

GUI Herong，CHEN Song   

  1. 1. School of Resources and Civil Engineering, Suzhou University, Suzhou 234000, China
    2. National Engineering Research Center of Coal Mine Water Hazard Controlling, Suzhou 234000, China
  • Received:2015-03-31 Revised:2015-07-17 Online:2016-05-15 Published:2016-05-15

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摘要：

煤矿区地下水既是重要的地下水资源，又影响煤矿安全生产。为了解宿南矿区地下水同位素化学特征，采集了宿南矿区松散层水、砂岩水和灰岩水样品进行T、D、18O、87Sr/86Sr和溶解碳酸盐岩中13C、18O等同位素测试分析，并利用传统图示等方法探讨了地下水演化年龄、同位素特征及影响因素。结果表明：矿区3个含水层地下水中T含量较低，整体反映了矿区地下水多位时间久远的亚现代水补给；地下水中D、18O受到明显围岩的影响，其组成为-68.5‰~-44.3‰和-8.78‰~-6.29‰，平均值分别为-61.15‰和-8.16‰；围岩中碳酸盐岩含量决定了13CDIC与 18ODIC的变化关系；87Sr/86Sr值为0.710 6～0.712 3，平均为0.711 2，87Sr/86Sr比值主要受到了水岩作用的影响，可以有效地识别3个不同含水层水源。

关键词: 地下水, 同位素, 地球化学, 宿南矿区

Abstract:

Groundwater is not only the important water resource for human production, but also affecting coal mining safety in coalmining region. In order to understand the characteristics of isotopes in groundwater, the analysis of T, D, 18O, 87Sr/86Sr, 13Cdic and 18Odic compositions of groundwater samples from loose aquifer, sandstone aquifer and limestone aquifer in Sunan mining area, Anhui Province had been performed; the result were used to discuss the evolutionary age, isotope characteristics and its influencing factors of groundwater samples based on traditional graphic methods; the results showed that the tritium contents in groundwater samples from three aquifers are low, which suggests that the groundwater in Sunan mining area are supplied by submodern water. The D and 18O concentrations are clearly affected by the surrounding rock; the values range from -44.3‰ to -68.5‰ and -8.78‰ to -6.29‰, with the average of -61.15‰ and -8.16‰, respectively. The content of carbonate in surrounding rock determined the relationship between 13CDIC and 18ODIC. The values of 87Sr/86Sr varied from 0.7106 to 0.7123, with an average value of 0.7112, which also could be used to identify the three aquifers, since the value of 87Sr/86Sr is clearly influenced by the waterrock interactions.

Key words: groundwater, isotopes, geochemistry, Sunan mining area

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