中文摘要：

运用电感耦合等离子体质谱仪（ICP—MS）和电感耦合等离子体发射光谱仪（ICP-AES）对贵州贞丰龙头山煤矿晚三叠世M2煤层的3件代表性的煤样和1件矸石样的微量元素及稀土元素地球化学特征进行了分析。结果表明：煤中明显富集Be、As、Sb、Tl、U、Mo、V、Ga、Zn等元素，其中V、Ga和Zn等元素的富集与物源区内受峨眉山玄武岩影响的早期岩层风化剥蚀产物的供给有直接关系；As、Sb、Tl等低温热液元素的异常富集则表明煤层可能受到了后期热液活动的影响。M2煤层中稀土元素总量较低，轻稀土元素相对富集，球粒陨石标准化后的稀土元素配分模式均呈缓右倾的“V”型曲线且存在明显的Eu负异常，反映出稀土元素与陆源碎屑岩关系密切。

英文摘要：

The ICP-MS and ICP-AES were applied to analyze the geochemical characteristics of microelements and rare earth elements （REE） of three representative coal samples and one gangue sample from No. M2 coal seam of late Triassic in Longtoushan Coal Mine in Zhenfeng county in Guizhou province. The results showed that the elements such as Be, As, Sb, Tl, U, Mo, V, Ga and Zn enriched obviously, the enrichment of elements such as V, Ga and Zn was di- rectly related to the supply of weathering and denudation products of early stratum which influ- enced by basalt of Mount Emei; the abnormal enrichment of epithermal elements such as As, Sb and Tl indicated that coal seam might influenced by the late hydrothermal activity. In coal seam of No. M2, total REE content was low and light REE enriched relatively, the partition pattern of chondrite-normalized REE was a smooth curve looked like the letter V and there was the negative anomaly of Eu, which reflected REE were closely related to terrigenous clastic rock.