抚顺始新世煤微量元素地球化学特征研究

Coal Measures Mineral Geochemical Characteristics of Trace Elements in Fushun Eocene Coal

为研究抚顺矿区始新世煤中微量元素地球化学特征,运用电感耦合等离子体质谱法(ICP-MS)对抚顺矿区始新世煤样品进行分析。结果表明:V、Cr、Co、Ni、Cu、Zn元素含量较高。全部样品都显示铕正异常,大部分样品铈负异常,少数分层铈无异常或轻度正异常。煤分层中大部分La_(N)/Lu_(N)>1,属轻稀土富集型;树脂残殖煤夹层La_(N)/Lu_(N)>1,属轻稀土富集型;煤精为中稀土富集型。煤层底板泥岩的REY配分曲线与中国玄武岩的REY配分曲线特征相似,表明抚顺矿区煤系下部的玄武岩是主要物源。

In order to study the geochemical characteristics of trace elements in the Eocene coal in Fushun mining area,inductively coupled plasma mass spectrometry(ICP-MS)was used to analyze the Eocene coal samples.The results show that the contents of V,Cr,Co,Ni,Cu and Zn are relatively high.All samples show europium positive anomaly,most samples have cerium negative anomaly,and a few layered cerium have no anomaly or slight positive anomaly.Most of the La_(N)/Lu_(N) in coal stratification is greater than 1,which is lREE enrichment type.The La_(N)/Lu_(N) of resin residual coal interlayer is greater than 1,which is lREE enrichment type.Coal concentrate is medium rare earth enrichment type.The REY distribution curves of mudstone in coal floor are similar to those of basalt in China,indicating that basalt in the lower part of coal measure in Fushun mining area is the main provenance.