第42卷第2期2023年3月Vol.42No.2Mar.2023JOURNALOFHENANPOLYTECHNICUNIVERSITY(NATURALSCIENCE)河南理工大学学报(自然科学版)山西寿阳地区离石黄土中完型钙质结核矿物成分及结晶特征研究季春旭,李彦荣(太原理工大学矿业工程学院,山西太原030024)摘要:为探究离石黄土中完型钙质结核矿物成分与结晶特征,以山西寿阳地区离石黄土中具有代表性的完型钙质结核为研究对象,利用X射线衍射(XRD)分析完型钙质结核中矿物质量分数,运用扫描电子显微镜(SEM)观察矿物颗粒分布、形状和结晶程度,根据能谱图元素质量分数确定结核内部致密程度、矿物分布、矿物形态和接触关系。结果表明:结核矿物成分为方解石、石英、黏土、斜长石和钾长石等,方解石明显向中心迁移;由外层向中心,方解石质量分数增加了16%,其他矿物减少了34%~47%;结核内部碳酸盐均为次生微晶方解石,说明结核形成时温度较低。研究结果可为类似条件下黄土中钙质结核的形成与气候演化提供理论依据和工程参考。关键词:完型钙质结核;矿物含量;结晶特征;气候环境演化中图分类号:P595文献标志码:A文章编号:1673-9787(2023)2-71-6StudyonmineralcontentsandcrystallizationcharacteristicsofcalcareousnodulesinloessofShouyangarea,ShanxiProvinceJIChunxu,LIYanrong(CollegeofMiningEngineering,TaiyuanUniversityofTechnology,Taiyuan030024,Shanxi,China)Abstract:Inordertoexplorethemineralcompositionandcrystallizationcharacteristics,thetypicalgestaltcalcareousnodulesinLishiloessinShouyangareaofShanxiProvinceweretakenastheresearchobject.ThemineralmassfractionincompletecalcareousnoduleswereanalyzedbyX-raydiffraction(XRD),thedistribution,shapeandcrystallizationdegreeofmineralparticleswereobservedbyscanningelectronmicro⁃scope(SEM),andtheinternaldensity,mineraldistribution,mineralmorphologyandcontactrelationshipofnodulesweredeterminedaccordingtotheelementmassfractionofenergyspectrum.Theresultsshowedthatthemineralcompositionofnoduleswascalcite,quartz,clay,plagioclaseandpotassiumfeldspar,andcal⁃citemigratedtothecenterobviously.Fromtheouterlayertothecenter,thevolumefractionofcalcitein⁃creasedby16%,whileothermineralsdecreasedby34%~47%.Thecarbonatesinsidethenoduleswereallsec...