新密煤田芦沟煤矿煤中稀土元素地球化学特征与开采前景
Geochemical characteristics and mining prospects of REE in Lugou coal mine of Xinmi coalfield
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摘要: 以河南新密煤田芦沟煤矿二1 煤层为研究对象,通过XRD、XRF、ICP-MS等分析技术研 究了在低温灰化条件下稀土元素的含量及赋存特征。 结果表明,芦沟煤矿二1 煤层中稀土元素总 含量范围为21.85~287.62μg/g,均值为96.20μg/g;本煤层中稀土元素呈现明显的轻稀土富 集、重稀土亏损的现象,判断主要来源于陆源碎屑;煤中稀土元素含量与煤中黏土矿物含量有关, 且与伊利石的含量最为紧密;中、新生代的构造运动虽然破坏了煤层的结构,但对煤中稀土元素 的含量和分布特征无明显影响;部分分层中的稀土元素含量已达到工业开采要求,具有一定的开 发和利用价值。Abstract: Thecontentofrareearthelementsandtheiroccurrencecharacteristicsunderlowtemperature ashingconditionsinLugoucoalmineofXinmicoalfieldwerestudiedbyXRD,XRFandICP-MSanalysistechniques.Theresultsshowthatthetotalcontentofrareearthelements(REE)inNo.1coalseam ofLugoucoalmineis21.85~287.62μg/g,withameanvalueof96.20μg/g.Therareearthelements inthecoalseamshowobviouslightrareearthenrichmentandheavyrareearthloss,whichismainlyderivedfromterrigenousclastics.Thecontentofrareearthelementsincoalisrelatedtothecontentofclay mineralsincoal,anditismostcloselyrelatedtothecontentofillite.Althoughthetectonicmovementof theMesozoicandCenozoicdestroysthestructureofcoalseams,ithasnoobviowseffectonthecontent anddistributioncharacteristicsrareearthelementsincoal.Thecontentofrareearthelementsinsome stratificationhassatisfiedtherequirementsofindustrialmining,andhascertaindevelopmentandutilizationvalue.
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