摘要
文章以平泉地热异常区为研究对象,通过对48个地下水样本进行采集与分析,测定了氟等多个离子的浓度水平,结合氟离子浓度分布图、温度场分布图、Piper三线图、Gibbs图等,系统分析了地下水的水化学特征、氟离子的空间分布特征及其成因机制。研究发现,研究区地下水化学类型以HCO_(3)-Ca·Mg型为主,地下水受到水-岩相互作用和蒸发浓缩过程的显著影响,氟离子浓度最大为2.35 mg/L,最小为0.13 mg/L,呈现南高北低的空间分布特点。高氟区与高温区以及断层分布密集区高度吻合,表明深部热液沿断裂上升及地热活动是氟离子浓度增加的关键因素。
This paper takes the Pingquan geothermal anomaly area as the research object.By collecting and analyzing 48 groundwater samples,the concentrations of multiple ions including fluoride were determined.Combined with the fluoride ion concentration distribution map,temperature field distribution map,Piper trilinear diagram,Gibbs diagram,etc.,the hydrochemical characteristics of groundwater,the spatial distribution characteristics of fluoride ions and their formation mechanisms were systematically analyzed.The research found that the groundwater chemical type in the study area is mainly HCO_(3)-Ca·Mg type.The groundwater is significantly affected by water-rock interaction and evaporation concentration processes.The maximum fluoride ion concentration is 2.35 mg/L and the minimum is 0.13 mg/L,showing a spatial distribution characteristic of being higher in the south and lower in the north.The high-fluoride areas are highly consistent with the high-temperature areas and the areas with dense fault distribution,indicating that the upward movement of deep geothermal fluids along faults and geothermal activities are the key factors for the increase in fluoride ion concentration.
作者
孙双振
李荣荣
赵青松
袁颖
韩宁博
SUN Shuangzhen;LI Rongrong;ZHAO Qingsong;YUAN Ying;HAN Ningbo(The Fifth Geological Brigade of Hebei Bureau of Geology and Mineral Resources,Tangshan 063000,China;Hebei Jidong Construction Engineering Co.,Ltd,Tangshan 063000,China;Hebei GEO University,Shijiazhuang 050031,China;Hebei Center for Ecological and Environmental Geology Research,Shijiazhuang 050031,China)
出处
《河北地质大学学报》
2025年第3期81-88,共8页
Journal of Hebei Geo University
基金
河北省专项勘查项目(13000024P00F2D410449K)。
关键词
氟离子
水化学
地热资源
成因机制
平泉
fluoride ion
water chemistry
geothermal resources
genesis mechanism
Pingquan
