贵州六枝、水城煤田晚二叠世煤的微量元素特征

通过对六枝和水城煤田 10个煤矿主要可采煤层的 45个煤样品的常量和微量元素系统研究 ,概括了这两个煤田煤中常量和微量元素的丰度和分布特征 ;阐述了煤中微量元素的亲合性。这两个煤田煤中的全硫含量在受海水影响的煤层中较高 (最高达 7.5 % ) ,而在非海水影响的煤层中较低 ( 0 .3% )。六枝煤田的全硫含量明显高于水城煤田。Ca-Mn-Ge的平均含量在六枝煤田较低 ,而在水城煤田相对较高。在这两个煤田和不同的煤层之间 ,煤中微量元素含量的变化较小。与世界烟煤中一般含量范围相比 ,这两个煤田的特征是 Mn,V,Cu,L i,Zr,Nb,Ta,Hf,T1,Th和 U的含量相对高。

TRACE ELEMENTS OF THE LATE PERMIAN COAL IN THE SHUICHENG AND LIUZHI COAL FIELDS,GUIZHOU

This study focuses on the trace elements of 45 coal samples from 10 coal mines in the Shuicheng and Liuzhi coal fields, and generalizes the concentration and distribution of the major and trace elements in the coal. The total sulphur content of the coal studied is higher in the marine influnced coal seams(up to 7.5%), and lower in the nonmarine influenced ones(as low as 0.3%).The total sulphur content of the Liuzhi coal is higher than that of the Shuicheng coal. The mean content of Ca Mn Ge is lower in the former coal field. Trace elements in coals from both coal fields show narrow variations in their concentrations among coal seams and coals. These coals are characterized by relativly high contents of Mn, V, Cu, Li, Zr, Nb, Hf, Ta, Tl and Th, when compared with the usual concentration ranges in bituminous coals. Three major trace element affinities(aluminium silicates, sulphides, and carbonates) are determined.