不同地质建造单元地下水化学特征及演化过程分析

——以西昌地区为例

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中图分类号：P641；P69 文献标识码：A 文章编号：2097-5465（2025）06-0065-10

Abstract：Theinvestigationofgoundwaterchemicalcharacteristsandevolutionaryprocesesindiferentgologicalunits（lastic rockareasand magmaticrockareas）oftheXichangregionprovidesareferencefortherationaldevelopmentandutilizationof regionalgroundwaterresources，promotessocio-economicdevelopment，andcontributestoecologicalcivilizationconstruction. Mathematicalstatisticalmethodswereapliedtoanalyzethehydrochemicalcharacteristics，whilethePipertrilineardiagramwas usedtodeterminehydrochemicaltypes.Inaddition，theGibbsdiagramandioncorelationanalysiswereemployedtoexplorethe formationandevolutionofgroundwater.Theresultsshowthattheconcentrationsoftraceelementsingroundwaterfromtheclasticrock areaarehigherthanthoseinthemagmaticrockarea.Groundwaterinthestudyareaismainlyneutraltoslightlyalkaline，with hydrochemical types dominated by HCO 3 -Ca 2+ and S042--Ca2+ . The HCO ⋅Ca2+ type is mainly distributed in theclastic rock area， whereas the SO 2-4 -Ca 2+ type is predominantly found in the magmatic rock area. The hydrochemical characteristics of groundwater are primarilycontroledbywater-rock interactions，includingtheweatheringanddisolutionofsilicateandcarbonatemnerals.

Keywords：geological structural unit；groundwater；hydrogeochemistry；Xichang region

0 引言

地下水作为水资源和水循环的重要组成部分，与当地经济建设、人民的生产生活、生态平衡等有十分重要的联系[1-4]。（剩余12233字）