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依据煤炭资源勘探资料,探讨了山西古交矿区邢家社勘探区石炭-二叠系煤中镓的分布状况及其地质影响因素。结果显示:研究区煤中镓的加权平均质量分数为15.87×10-6,比全球平均值要高0.5～3倍;煤层层位降低,镓含量呈明显的递减趋势。同时,煤中镓含量与灰分产率、灰分组成、硫含量及煤层厚度之间也有明显的相关关系。这些特征表明,区内煤中镓的矿物载体主要为粘土矿物,水动力较强和还原性较弱的泥炭沼泽条件可能有利于镓在煤中富集,且成煤期地壳的稳定程度也可通过一定方式影响到煤中镓的富集。
Based on the exploration data of coal resources, the distribution of gallium in the Carboniferous Permian coals from the Xingjiashe Exploration Area, Gujiao Mining Area, Shanxi, and its geological influencing factors are discussed. The results show that the weighted average mass fraction of gallium in coal is 15.87 × 10-6, which is 0.5 to 3 times higher than the global average. The coal seam layers decrease and the gallium content shows a decreasing trend. At the same time, there is also a clear correlation between gallium content and ash production, ash composition, sulfur content and coal seam thickness. These characteristics indicate that the mineral carriers of gallium in the coal are mainly clay minerals, and the peat swamp conditions with stronger hydrodynamic force and weaker reducibility may facilitate the enrichment of gallium in the coal and the stability of the crust during the coal-forming period may also be Through a certain way to affect the enrichment of gallium in coal.