Study on coal sulfur content features and sedimentary environment of Permian seams in northern Guizhou Coalfield

In order to discuss sulfur features and sedimentary environment of coal, the theory and method of sedimentology and geochemistry were applied to stud y on the major mining seams (C12, C8 and C5 seams) of the Upper Permian Longtan Formation of Wujiazhai Anticline in Renhuai, Guizhou Province.The study results s howed that Longtan Formation could be divided into three level sequences and the relationship between the sulfur features and sedimentary environment of each seam were compared.The C12 seam was a high sulfur coal and sedimentary environment mainly was lagoon-tidal flat facies.The Seam C8 was a low sulfur coal and sediment ary environment mainly was the Delta Plain Facies.The Seam C5 was a medium high sulfur coal and the sedimentary environment mainly was the Carbonate Platform F acies.The sedimentary environment would play a decisive role to sulfur content of coal.In the Deltaic sedimentary environment, less influenced by sea water, the sulfur content of coal was low and the primary sulfur content mainly was sulfur content of coal formatted plants.In the environment of Lagoon and Carbonate Platform, highly i nfluenced by sea water, the sulfur content of coal was high and sulfur mainly was iron sulfur of secondary sulfur.