稀土元素在皖北卧龙湖矿岩-煤蚀变过程中的迁移机制

发布时间：2018-06-12 12:57

本文选题：稀土元素 + 变质作用　；参考：《稀土》2017年03期

【摘要】：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。
[Abstract]:In order to study the characteristics of rare earth element migration and enrichment in the process of rock-coal alteration near the surface, this study selected 8 coal seams of Wolong Lake Coal Mine in Huaibei as the research object. The total rare earth content, the ratio of light and heavy rare earth elements and the anomalous characteristics of europium were measured by ICP-MS. The results show that the total rare earth content decreases from bottom to top, the upper and lower part of the rock mass is light, the ratio of heavy rare earth elements is obviously different, and the anomaly difference of europium between rock mass and altered coal is significant. The analysis shows that the total rare earth and europium anomalies of altered coal are mainly derived from sedimentary inheritance, and the intrusions of rock mass have not changed their composition, but the lower alteration coal is probably the result of apatite enrichment in the upper altered coal of the rock mass. In this study, it is concluded that the total rare earth content, spatial distribution and europium anomaly of altered coal are not obviously altered or affected by magmatic emplacement activity, but only the local coal seam in the upper part of the rock mass is subjected to rock-coal alteration and slightly enriched in light rare earths.
【作者单位】：安徽大学资源与环境工程学院;中国矿业大学煤层气资源与成藏过程教育部重点实验室;
【基金】：国家自然科学基金项目(41602173) 安徽大学博士科研启动经费项目(J10113190091) 煤层气资源与成藏过程教育部重点实验室(中国矿业大学)开放基金资助项目(2015-002) 大学生创新创业计划项目(J18515303)
【分类号】：P618.11

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