PRELIMINARY STUDY ON THE TRACE ELEMENTS IN COALS OF DONGSHENG MINING DISTRICT, SHENFU COALFIELD

732 core samples are sampled from five minable coal seams in Yan'an formation in Dongsheng Mining District,Shenfu coalfield.23 trace elements in coals are determined using spectroscopy,atomic fluoroscopy,atomic absorption methods.The contents and distributions of trace elements in coals and the enrichment coefficients of trace elements relative to the crust abundance are expounded,and the hazardous and useful elements are evaluated preliminarily.