乌达矿区高硫煤层的聚积环境与煤中硫的分布

DEPOSITIONAL ENVIRONMENT AND SULFUR DISTRIBUTION OF HIGH-SULFUR COAL IN WUDA MINING AREA

摘要: 对乌达矿区高硫煤层的沉积相、煤相和煤中硫在平面上的分布进行了研究。结果表明,10煤层泥炭聚积时的古水系对煤中硫的分布有明显的影响,9煤层泥炭聚积时的古环境决定了煤中硫的分布,浅水陆棚或分流间湾环境中形成的煤层具有较高GI、V/I值和硫含量,在障壁砂坝中形成的煤层具有高的硫含量、低的GI、V/I值,在泻湖中具有高GI、V/I值和相对较少的硫含量。

Abstract: The horizontal distrbution of depositional facies,coal facies and sulfur of high-sulfur coals in Wuda coal mining area are analyzed in this paper.The results show that there was a distinct influence of paleodrainage pattern on the sulfur distribution during the peat accumulating of coal seam No.10.The sulfur distribution of coal seam No.9 was influenced by the paleoenvironment during peat accumulation.The coal formed in shallow shelf or interdistributary bay has high values of GI,TPI and sulfur content,whereas the coal formed in barrier sand bar has high content sulfur and low values of GI and V/I,and the coal formed in lagoon has high values of GI and V/I and relatively low sulfur content.