贵州遵义吴家寨背斜晚二叠世煤层稀土元素地球化学特征

Geochemical Characteristics of Rare Earth Elements in Late Permian Coal Seam of Wujiazhai Anticline, Zunyi, Guizhou

借助电感耦合(ICP^MS)现代分析方法,对遵义吴家寨背斜煤层元素地球化学特征进行了系统研究。结果表明:煤中稀土元素分配模式曲线呈明显的左高右低(或)右近于水平的的宽缓的"V"字形,且存在明显的Eu负异常,说明煤中稀土元素主要来自陆源物质的供应。该区轻、重稀土有明显的分离,轻稀土元素相对富集,煤中稀土元素ΣREE平均值明显高于全国煤中ΣREE平均值,有可能成为稀土矿产的新来源。

The element geochemical characteristics of Wujiazhai anticline coal seam in Zunyi were systematically studied by inductive coupling(ICP to MS) modern analysis method.The results showed that the distribution pattern of ΣREE in coal is obviously left-high-right-low(or) Right near the horizontal "V" shape, and there is obvious negative Eu anomaly, indicated that the ΣREE in coal mainly come from the supply of terrestrial materials. in this area,the light and heavy rare earth elements are obviously separated, and the light rare earth elements are relatively enriched in this area. The average value of ΣREE in coal is obviously higher than the average value of ΣREE in coal in China. It may be a new source of rare earth minerals.