Research on grade variation regularity of paragenetic germanium deposit along uprightness in Shengli Coalfield,Inner Mongolia

The paragenetic germanium deposit of coal in Shengli Coalfield was discovered in recent years and provided with autocephaly exploitation value in China.Through the analysis of 200 coal samples from 29 boreholes 6 variation patterns of germanium grade within coal-seams along uprightness have been discovered.Especially,germanium grade appeared pinnacle value in the middle of the coal-seams of majority bores in Shengli Coalfield.It is different with many research conclusion reported previously that pinnacle value of germanium grade only located in the top and bottom of coal-seams.Therefore,the author thinks that accumulating of germanium mostly took place in the peat formation stages,mostly process mechanism is sorption by organic matter from peripheral circulating solution,germanium enrichment intensity changed with original sedimentary environments and providing conditions of germanium.