Dananhu coal field is an important large-scale coal field in China.Many scholars have found the enrichment of gallium,germanium and other key metals in the coal of Dananhu coal field.On the basis of previous studies,this paper systematically collected and sorted out the research results of key metals in coal,and combined with some test data,expounded the distribution and enrichment causes of key metal elements such as gallium and germanium in coal in Dananhu coalfield.Gallium and germanium are shown to have low content in the top and bottom,and are enriched in the middle coal seam.The relationship between gallium and Ge content in coal and ash yield,Al2O3 and Fe2O3 in coal ash is analyzed.It is concluded that gallium in the study area is a composite origin of inorganic minerals and organic matter,and germanium should be formed by weathering transport or groundwater dynamic transport of surrounding materials.It is inferred that gallium and Ge in Dananhu coalfield mainly comes from the southern Juelotage orogenic belt.
关键词
大南湖煤田/煤中金属/富集规律/成因机制/研究
Key words
Dananhu coalfield/metal in coal/enrichment pattern/formation mechanism/study
维普
万方数据