GEOCHEMISTRY OF LATE TRIASSIC COAL IN CHANGHEBIAN COALFIELD, CHONGQING, CHINA

摘要

Research of trace element in coals mainly places on three aspects. Well understanding concentration, migration, transformation and occurrence of trace element in coal utilization offers basic formation for researches on environmental effect of coals. In addition, trace elements in coal are the indicator for geologic condition in coal-forming. What's more, some high enrichment trace element in coal could be exploited as mining resource, such as Ge, Ga and U. Xujiahe Formation are the main coal bearing strata in Chongqing, but previous research have less report on these coals. In this paper, we discuss the chemistry of coals, petrographic compositon of coals, the abundance of trace element and the element-enriching factor for Changhebian coal in ChongQing.