河北平泉地热异常区氟分布特征及成因机制

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中图分类号：P595 文献标识码：文献编码：A 文章编号：2097-5465（2025）03-0081-08

1.The Fifth Geological Brigade of Hebei Bureau of Geology andMineral Resources，Tangshan O630o0，China；2.Hebei Jidong Construction Engineering Co.，Ltd，Tangshan O630o0，China；3.Hebei GEO University，Shijiazhuang050031，China；4.Hebei Center for Ecologicaland Environmental Geology Research，Shjiazhuang O5o031，China

Abstract：Thispaper takesthePingquangeothermalanomalyareaastheresearchobject.Bycolectingandanalyzing48 groundwatersamples，theconcentrationsofmultipleionsincludingfluorideweredetermined.Combinedwiththefluorideion concentrationdistributionmap，temperaturefielddistributionmap，Pipertrilineardiagram，Gibbsdiagram，etc.，the hydrochemicalcharacteristicsofgoundwater，thespatialdistributioncharacteristcsoffuordeionsandtheifomationmsms were systematicall analyzed.The research found that the groundwater chemical type in the study area is mainly HCO3 -Ca ⋅Mg type.Thegroundwaterissignificantlyafectedbywater-rock interactionandevaporationconcentrationproceses.Themaximum fluoride ion concentration is 2.35mg/L and the minimum is 0.13mg/L ，showing a spatial distribution characteristic of being higherinthesouthandlowerinthenorth.Thehigh-fluorideareasarehighlyconsistentwiththehigh-temperatureareasandthe areas withdensefaultdistribution，indicatingthattheupwardmovementofdeepgeothermalfluidsalongfaultsandgeothermal activitiesare thekey factorsforthe increasein fluorideionconcentration.

Keywords：fluoride ion；water chemistry；geothermal resources；genesis mechanism；Pingqua

来稿日期：2025-01-27 DOI：10.13937/j.cnki.hbdzdxxb.2025.03.011

基金项目：河北省专项勘查项目（13000024P00F2D410449K）

作者简介：孙双振（1984—），男，河北保定人，高级工程师，研究方向为水化学和地热地质。（剩余8401字）