内蒙古阿刀亥矿晚古生代煤的微量元素和稀土元素 地球化学特征

利用电感耦合等离子体质谱(ICP-MS)、X射线荧光光谱(XRF)、工业分析等方法对内蒙古阿刀亥矿煤的微量元素和稀土元素地球化学特征进行了研究，并根据某些微量元素的含量及比值探讨了研究区的成煤环境。研究发现，与中国上陆壳相比阿刀亥矿煤中比较富集Cl，Sc，Ge，Se，Zr，Mo，Cd，In，Sb，Te，Hf，Hg，Pb，Bi和REE。稀土元素分布模式表明LREE明显富集，HREE相对亏损，Eu负异常明显，且轻稀土元素之间的分馏程度较高，重稀土元素之间的分馏程度较低，稀土元素可能主要赋存于黏土矿物中。δEu，Sr/Ba，V/（V+Ni），V/Ni，Ni/Co值及S的含量总体上反映出阿刀亥矿泥炭的沉积环境为内陆淡水还原环境，间或受到海水的影响。

Geochemistry of trace and rare earth elements in the Late Paleozoic Coal from Adaohai Mine, Inner Mongolia

The trace and rare earth element geochemistry of coal in Adaohai mine were studied using the methods of inductively coupled plasma mass spectrometry，X ray fluorescence and proximate analysis.On the basis of the contents and ratios of some elements，the peat accumulating environment of studying area was discussed.The results show that elements including Cl，Sc，Ge，Se，Zr，Mo，Cd，In，Sb，Te，Hf，Hg，Pb，Bi and REE are enriched，compared with the average content of Chinese upper crust.The rare earth element patterns indicate that the light rare earth element is enriched while the heavy rare earth element is deficit and show a clear Eu negative anomaly.The fractionation of light rare earth element is high，and that of the heavy rare earth element is low.The occurrence of rare earth element is probably related to clay minerals.The ratios of δEu，Sr/Ba，V/（V+Ni），V/Ni，Ni/Co and S illustrate that the peat accumulating environment of Adaohai is in lake fresh water，intermittenly affected by sea water.