DISTRIBUTION OF Ge, Ga,As,S IN THE COAL METAMORPHIZED BY HEAT OF SUB-VOLCANICS

Wumuchang Area is a local bituminous coal district metamorphized by sub-volcanics in Yiming Coal Field which is located in northeast China. In the coalification process, Ge,S migrated from the coal with higher coal ranks, moved with thermal water to upper part, precipitated and enriched in the coal with lower coal ranks. Ge,S As corelated positively and Ga negatively with organic matter of coal, but the corelation coefficiency decrease with increase of coalification of the coal.