PRELIMINARY DISCUSSION ON GENETIC GEOCHEMISTRY OF PARAGENETIC GERMANIUM DEPOSIT IN SHENGLI COALFIELD,INNER MONGOLIA

Abstract

By using statistic and constructive analytical method,the relationship between germanium grade and volatile matter, ash yield and sulfur content of coals was studied. The result indicated that germanium grade is positive correlation with volatile matter,negative correlation with ash yield of raw coal, positive correlation with ash yield of cleaning coal. The coals as a whole show moderate in sulfur content.Germanium grade is positive correlation with sulfur content of raw coal and cleaning coal.Ash yield exponent of coals is 3.579,it is relatively low.The germanium distributed inhomogeneously.The rich germanium paragenetic deposit of coal belongs to the edge sediment of fault depression.High germanium grade at one time or singly exists in the top, center and bottom of coal-seams.The maximum of germanium grade are mostly appeared in the center of seam.It is different with many research conclusions reported formly that pinnacle value of germanium grade only located in the top and bottom of coal-seams.Therefore,germanium has been mainly found to be incorporated with organic matter in Shengli coalfield,favorable conglomeration condition of germanium is weaker water power,lower water table and high reductive stagnant swamp condition.The principal mechanism of germanium accumulation during the peat-forming stage is adsorption of organic matter.