中国地质调查2026，Vol.13Issue(4)：100-111,12.DOI:10.19388/j.zgdzdc.2025.185
郯庐断裂带南段高氟地热水成因机制及健康风险评价
Genetic mechanism of fluoride-enriched geothermal groundwater in the southern segment of Tanlu fault and human health risk assessment
摘要
Abstract
The geothermal water has excessive fluoride concentrations in the southern segment of Tanlu Fault.In order to support the scientific development and sustainable utilization of geothermal resources in the southern seg-ment of Tanlu Fault,the authors explored the evolution mechanisms,and formation patterns of high-fluoride geo-thermal water,and evaluated the health risk.Eleven water samples were collected in the southern segment of Tan-Lu Fault,and geothermal water distribution and characteristics were identified via hydrochemistry,hydrogen/oxy-gen isotope testing,hydrogeochemical diagrams and ion ratio analysis.Besides,the cycle process and reservoir forming condition of the fluoride-enriched geothermal water along Tanlu Fault were explored.The results show that the local groundwater is HCO3-Ca type(acidic),while geothermal water is mostly SO4-Na type(alka-line).The fluoride-enriched water occurs mainly in geothermal reservoirs,with the fluoride levels exceeding na-tional standards by 2～12 times.While the groundwater fluoride levels are within limits.The geothermal water is mainly recharged by atmospheric precipitation at 1 116～1 453 m elevation,circulating at 1 259～1 534 m depth,and reservoir temperature of 106.5～119.2℃(via quartz geothermometry).The fluoride-enriched geothermal water chemistry is shaped by multiple hydrogeochemical processes.Fluoride-enriched mineral weathering/disso-lution is the main cause of high fluoride,while alkaline conditions and cation exchange also contribute to fluoride accumulation.Health risk assessment shows that high-fluoride geothermal water poses a greater potential risk to children than to adult women/men.The evolution mechanisms and formation patterns of high-fluoride geothermal water in the southern segment of Tanlu Fault were defined,and the causes of high fluoride and health risk differ-ences were revealed,providing scientific basis for local geothermal resource management.The differential health impacts of high-fluoride geothermal water on different populations were emphasized and it is highly significant for ensuring local residents'water safety,particularly for children.关键词
氟/水文地球化学/同位素/郯庐断裂带Key words
fluoride/hydrochemistry/isotope/Tanlu Fault分类
天文与地球科学引用本文复制引用
高天琦,张寿川,周明泽,朱晨莹,蔡蕾鹏,付丹平..郯庐断裂带南段高氟地热水成因机制及健康风险评价[J].中国地质调查,2026,13(4):100-111,12.基金项目
中国地质科学院"高温带状地热资源循环演化机制研究(编号:JKY202406)"和河南省地矿局"基于河床下切条件下黄河补给地下水强度变化对两岸生态环境影响研究——以夹河滩为例(编号:豫地矿青科创[2021]10号)"项目联合资助. （编号:JKY202406）
