准格尔煤中镓的分布特征和富集机理分析

Analysis on Distribution Characteristic and Enrichment Mechanism of Elements Ga in Junger Coalfield

在对准格尔煤田4个矿区大量地质勘探(钻孔)资料与煤质资料分析的基础上,结合实采煤样的XRD测试结果,分析了该研究区煤中镓(Ga)的分布特征、赋存状态和富集机理。研究发现:镓在该研究区明显富集,且显示不同的富集特征。镓主要赋存在勃姆石中,还可能赋存在高岭石中,与硫酸盐硫在成因上有一定的联系。镓的富集成因主要与物源区母岩的成分,沉积环境和古气候条件有关,后生淋滤作用和地下水的活动也是造成镓富集的另一因素。

Based on the geological exploration data of four mining districts from the Junger Coalfield and XRD techniques used on the sam- ples from the districts, the distribution characteristics, and mode of occurrence and enrichment mechanism of the elements Ga in the districts was discussed in the paper. The results showed that the element Ga was notably enriched in the coal of the study area, and show different enrich characteristics. The elements Ga mainly occur in boehmite, may occur in kaolinite, and have something to do with sulfured on origin. The enrichment of the elements Ga was mostly in relation to the composition of parent rocks, and the advantaged depositional environment and geologic climate environment caused boehmite creating and enrichment. Epigenesist and the activity of groundwater was another factor of enrichment of the elements Ga.