| 阜阳地区地热水化学特征及同位素分析 |
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| 作者姓名： | 王旭东 刘海 刘桂建 |
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| 作者单位： | 1.中国科学技术大学地球和空间科学学院,合肥 230026;2.安徽省公益性地质调查管理中心,合肥 230041 |
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| 基金项目： | 安徽省地勘项目“阜阳城区地热预可行性勘查、亳州地热资源详查(编号: 2013-j-2-24及2010-1-17)”资助 |
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| 摘 要： | 为研究阜阳地区地热形成机制的控制作用,在分析研究区地热地质条件的基础上,利用已有的勘探井水质资料,对研究区地热水的化学特征进行了分析,得出地热流体在垂向、横向上的分布特征,揭示了太古宇五河群风化壳可以构成热储,其较低的总溶解固体(total dissoloved solids,TDS)不同于区域常见的新近系馆陶组、古近系界首组热储。同时,利用大气降水和地热水的稳定同位素资料,研究得出区内地热水的来源主要为大气降水,大气降水经侧向径流补给和蒸发/浓缩作用形成了高TDS地热流体; 利用地热水放射性同位素资料估算了研究区地热水年龄。通过地热水化学、同位素及控热构造等研究,建立了研究区地热资源形成的概念模型,为该地区地热开发利用提供了指导。
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| 关 键 词： | 地热水 水化学特征 同位素分析 阜阳地区 |
| 收稿时间： | 2018-05-28 |
Chemical characteristics and isotope analysis of geothermal water in Fuyang area |
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| Authors: | WANG Xudong LIU Hai LIU Guijian |
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| Institution: | 1. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;2. Public Geological Survey Management Center of Anhui Province, Hefei 230041, China |
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| Abstract: | In order to study the control function of geothermal formation mechanism of in Fuyang area, this paper analyzes the hydrochemical characteristics of geothermal water on the basis of the existing data of exploration wells and geothermal and geological conditions. And the characteristics of vertical and horizontal distribution of geothermal fluids were obtained. The authors also revealed that there was thermal storage in the weathering shells of Archaean Wuhe Group and it had lower total dissolved solids (TDS), which was different from common thermal storage of Neogene Guantao Group and Paleogene Jieshou Group. At the same time, the stable isotope data of atmospheric water and geothermal water indicate that atmospheric water is the main source of geothermal water in the research area and that the high TDS geothermal fluid was formed by the lateral runoff supply and evaporation/concentration of atmospheric water. The geothermal water radio-isotopes were also used to estimate the age of geothermal water. The conceptual model for the formation of geothermal resources was established through the study of geothermal water chemistry, isotope and heat control structure, which could provide some guidance for the development and utilization of geothermal resources in this area. |
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| Keywords: | geothermal water hydrochemical characteristics isotope analysis Fuyang area |
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