云南省昭通地区宣威组C_5煤层硫分分布特征

Sulfur Distribution Characteristics in Xuanwei Formation Coal Seam C_5,Zhaotong Area,Yunnan Province

对云南省昭通地区晚二叠世C5煤层硫分和灰分进行测试及资料分析,编制了C5煤层硫分分布等值线图,分析了硫分、灰分分布特征及相关关系等。结果表明:研究区硫分大于1%的硫分赋存状态主要为硫铁矿硫,有机硫次之,硫酸盐硫最少;硫分分布主要受到成煤环境的控制,自西向东逐渐由陆相过渡为滨海相,硫分含量呈逐渐增加的趋势,而灰分分布与硫分呈负相关关系。在研究区中部陆相向滨海相过渡地带的洛旺向斜,硫分与灰分相对适中,是优质煤炭资源的有利勘探开发区。

After sulfur and ash content tests and data analysis for late Permian coal seam C5 in the Zhaotong area,Yunnan Province,compiled C5 coal sulfur content isogram and analyzed sulfur,ash content distribution characteristics and dependency relation between them.The result has demonstrated that： the sulfur occurrence of coal with sulfur content 1% is mainly pyritic sulfur,organic sulfur the second,and sulfate sulfur the least.Sulfur distribution is mainly controlled by coal-forming environment-terrestrial facies transiting to littoral facies from west to east,with a gradually increasing trend of sulfur content,while ash distribution is negatively correlated with sulfur.The middle study area Luowang syncline in a terrestrial to littoral transitional zone has relatively proper sulfur and ash content is the favorable exploration and exploitation area for high quality coal resources.