贵州省原煤中微量元素的组成特征

THE CONCENTRATIONS OF TRACE ELEMENTS IN COAL IN GUIZHOU PROVINCE

研究了贵州省各主要煤田中主采煤层的As,B,Ba,Be,Cd,Co,Cr,Cu,Hg,Li,Ni,Pb,Sb,Se,Sr.Tl,V,Zn等微量元素的组成特征.贵州省原煤中微量元素的含量总体上和世界范围内的一致,但Sb,As,Hg等有害元素则明显富集.由于煤炭成因上的特殊性,其微量元素的组成除受成煤植物的影响外,后期成煤作用对其有决定性的影响.

Concentrations of.As, B, Ba, Be, Cd, Co, Cr. Cu, Hg, Li, Ni, Pb. Sb, Se, Sr, Tl, V, Zn have been determinated in channel samples collected at main active mines in Guizhou province. By world standards ,mean concentrations of main trace elements are consistent with world coals, while concentrations of Be, Cu, Zn, Sb, Se are relatively high. Moreover, contents of harmful elements, such as As, Hg, Sb, are more higher than their Clarke values, and being in enrichment states. Besides the coal forming plants effects on trace elements in coal,the subsequent diagenesis and metamorphism,including paleogeography and paleoenvironment, also have definitive effects on trace elements distribution. Based on correlation analysis, the trace elements can be devided as two groups. The first is characterized by detrital original elements. The major in the second group is volatile and harmful elements.