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为深入探讨近地表岩-煤蚀变过程中稀土元素迁移、富集特征,本研究选取淮北卧龙湖煤矿8煤层为研究对象,通过ICP-MS测试其总稀土含量、轻重稀土比及铕异常特征。结果显示,总稀土含量自下而上依次降低,岩体上下部蚀变煤轻、重稀土比存在明显不同,岩体与蚀变煤铕异常差异显著。分析表明,蚀变煤总稀土和铕异常主要来自沉积继承,岩体侵入并未改其组成;而上、下蚀变煤轻重稀土分异很可能是岩体上部蚀变煤中磷灰石富集轻稀土的结果。本研究认为,蚀变煤总稀土含量、空间分布及铕异常特征均未明显遭受岩浆侵位活动改造或影响,仅岩体上部局部煤层遭受岩-煤蚀变改造而轻微富集轻稀土。
In order to investigate deeply the migration and enrichment of REE during near-surface rock-coal alteration, this study selected 8 coal seam of Wolonghu coal mine in Huaibei as the research object, and measured its total RE content, LREE and Eu anomalies by ICP-MS . The results show that the total rare earth content decreases from bottom to top, and the alteration of light and heavy rare earths in the upper and lower parts of the rock mass is obviously different. The analysis shows that the anomalies of total rare earth and europium in the altered coal mainly come from sedimentary succession and the intrusion of rock mass does not change its composition. The variation of light and heavy rare earths in the upper and lower alteration coal is probably the result of apatite rich Set light rare earth results. The study shows that the total rare earth content, spatial distribution and anomalous Eu anomalies in the altered coal are not significantly altered or affected by the magmatic emplacement activity. Only the upper part of the rock mass is altered by rock-coal alteration and slightly enriched in light rare earth.