河北地质大学学报2025，Vol.48Issue(3)：81-88,8.DOI:10.13937/j.cnki.hbdzdxxb.2025.03.011
河北平泉地热异常区氟分布特征及成因机制
The Distribution Characteristics and Genesis Mechanism of Fluorine in the Geothermal Anomaly Area of Pingquan,Hebei Province
摘要
Abstract
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 HCO3-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.关键词
氟离子/水化学/地热资源/成因机制/平泉Key words
fluoride ion/water chemistry/geothermal resources/genesis mechanism/Pingquan分类
天文与地球科学引用本文复制引用
孙双振,李荣荣,赵青松,袁颖,韩宁博..河北平泉地热异常区氟分布特征及成因机制[J].河北地质大学学报,2025,48(3):81-88,8.基金项目
河北省专项勘查项目(13000024P00F2D410449K) （13000024P00F2D410449K）
