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1、准格尔煤田高铝煤层夹肝中稀土元素地球化学特征及意义石松林】，刘钦甫I,孙俊民"，伍泽广人3,孙波I(1.中国矿业大学(北京)地球科学与测绘工程学院，北京100083;2.大唐国际高铝煤炭研发中心，内蒙古呼和浩特010050;3.国家能源局高铝煤炭开发利用重点实验室，内蒙古呼和浩特010050)摘要：利用电感耦合等离子质谱法(IPC-MS)详细研究了准格尔煤田石炭系太原组中高铝煤层夹吁的稀土元素地球化学特征。研究表明：样品稀土元素总量(ZREE)为3.63~345.56pg/g,平均值为61.83
2、ig/g,轻、重稀土元素的含量比值(LREE/
3、HREE)为0.56~25.64,平均值为5.56,相对富集LREE;Eu负异常显著；SCe与8Eu.(Dy/Sm)N、工REE三者之间相关性表明：该区高铝煤层夹歼的成岩作用对REE影响不明显；5Ce和Ceanom值的变化反映了研究区高铝煤层夹歼形成于陆相环境，高铝矿物形成于氧化环境；稀土元素分配模式显示高铝煤层夹歼物源主要为盆地北缘阴山古陆的加里东海西期的花岗岩(斜长花岗岩、二长花岗岩、钾长花岗岩和细晶花岗岩)，以及早期沉积的本溪组铝土矿。关键词：准格尔煤田；高铝煤层夹歼；稀土元素；地球化学；物源屮图分类号：P618.7文献标识码：AGeo
4、chemicalcharacteristicsofrareearthelementinhigh・aluminapartingsinJungarCoalfieldSHISong-lin1,LIUQin-fuSUNJun-min23,WUZe-guang23,SUNBo1(1.SchoolofGeoscienceandSurveyingEngineering,ChinaUniversityofMiningandTechnology,Beijing100083,China;2.DatangInternationalResearchandDevel
5、opmentCenterofHighAluminaCoal,MongoliaHohhot010050,China;3.NationalEnergyKeyLabofHighAluminaCoalDevelopmentandUtilization,MongoliaHohhot010050,China)Abstract:REEgeochemicalcharacteristicsofhigh-aluminapartings,fromTaiyuanFormationofCarboniferousinJungarCoalfield,werestudied
6、byusingICP-MS・TheresultsshowthattheREEcontentsrangefrom2.63to345.56Mg/g,andtheaverage61.83Mg/g・TheratiosofLREE/HREErangefrom0.56to25.64,andtheaverage5.56・ThesecharacteristicsshowthatLREEarcmuchricherthanHREE.REEdistributionpatternsofsamplesarccharacterizedbyobviousnegativeE
7、uanomaly.REEisnotobviouslyeffectedbydiagenesisofthehigh-aluminapartingsaccordingtothebadrelativitybetween§Ceand§Eu,(Dy/Sm)N,工REE,respectively.AccordingtothecharacteristicsofSCeandCcanOnivalues,itcanbeconcludedthatthesedimentaryenvironmentofhigh-aluminapartingsismainlycontin
8、entaloxidizedwaterconditions•ThecharacteristicsofREEshowthatthematerialsourceofhigh-aluminapartingsarcfromYinshanancientcontinent,anditsprovenancearcmainlyCalcdonian-Hcrcyniangranites,suchasplagioclasegranites,adamellites,moyitesandapliticgranites,andbauxitedepositsfromBenx
9、iFormatiori・Keywords:JungarCoalfield;high-aluminapartings;REE;geochemistry;provena
