| 江西省安福地区地热水化学特征研究 |
| 投稿时间：2022-10-13 修订日期：2022-12-13 点此下载全文 |
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| 中文摘要:为研究江西安福地区水文地球化学特征及控制因素，本文采集了15组样品，采用水化学、同位素分析等方法进行研究。结果表明：研究区地热水以Na-HCO3型水为主，地下水以HCO3–Na·Ca型为主，地表水由西南向东北从HCO3–Na·Ca向HCO3–Ca型水演化。水化学组分演化过程主要受岩石风化作用控制，地层封闭性较差，水中的Na+、HCO3-、Sr2+来源于硅酸岩风化溶解。由稳定同位素特征可知，研究区地热水补给来源为大气降水。研究区热储温度为49.8℃-101.4℃，地热水循环深度在1502.6-1513.6m。热水在沿断裂带上升过程中与浅层冷水发生混合，其混合比例为76.1%-86.5%。研究成果为安福地区水循环演化提供依据，有利于地热资源的合理开采与保护。 |
| 中文关键词:地热水 水化学 稳定同位素 锶 |
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| Hydrochemical characteristics of Geothermal Water in Anfu Area of of Jangxi |
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| Abstract:In order to study the hydrogeochemical characteristics and control factors in Anfu area of Jiangxi Province. We collected 15 groups of samples from Anfu area and analyzed the isotopic and hydrochemical characteristics. The results showed that the geothermal water in the study area was dominated by Na-HCO3 type water, the groundwater was dominated by HCO3-Na·Ca type, and the surface water changes from HCO3-Na·Ca to HCO3-Ca from southwest to northeast. It can be found that the evolution process of hydrochemical components is mainly controlled by rock weathering, and the formation sealing is poor. Na+, HCO3-and Sr2+ in water are origin from the weathering and dissolution of silicate. According to the stable isotope characteristics, the geothermal water in the Anfu are of meteoric origin and have a slight 18O shift. The geothermal reservoir temperature in the study area is 49.8 °C -101.4 °C, and the geothermal water circulation depth is 1502.6-1513.6 m.The geothermal water rise in the study area is mixed with shallow cold water, and the mixing ratio is calculated to be 76.1%-87.5%. The results provide a basis for the evolution of water cycle in Ji'an area, which is conducive to the rational exploitation and protection of geothermal resources. |
| keywords:Geothermal waters, Hydrochemistry, Stable isotope, Strontium |
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