枣庄煤田太原组煤中微量元素地球化学特征  

TRACE ELEMENTS GEOCHEMISTRY OF THE COALS IN THE TAIYUAN FORMATION FROM ZAOZHUANG COAL FIELD

作　　者：黄文辉[1] 杨起[1] 汤达祯[1] 康西栋[1] 刘大锰[1] 

机构地区：[1]中国地质大学能源系,北京100083

出　　处：《现代地质》2000年第1期61-68,共8页Geoscience

基　　金：国家自然科学基金项目!(项目号 :4963 2 0 90;49872 0 5 4);中国博士后科学基金

摘　　要：采用中子活化法测定了山东枣庄煤田晚古生代太原组高硫煤层中的微量元素质量分数 ,用数理统计方法取得了高硫煤中微量元素的浓度分布范围、平均值和变异系数 ,用逐步聚类分析法和相关分析法分析了微量元素的共生组合关系 ,并用扫描电镜 -能谱分析了不同煤岩组分的微量元素浓度 ,在此基础上结合形态硫分析结果和沉积相分析结果 ,讨论了高硫煤中微量元素的富集因素、聚集机理和成因背景 ,指出受海水影响的沼泽沉积环境不但对煤中形态硫的分布和含量有控制作用 ,同时对煤中微量元素的浓度和共生组合特点也有影响。太原组高硫煤中的微量元素按其成因可分成两组 ,一组是陆源碎屑富集型 ,其含量直接与煤中灰分产率呈正相关关系 ;另一组为盆地内部沉积 -生物作用富集型元素 ,海水的入侵和盆地介质的停滞还原条件和陆源碎屑物质输入量的减少最有利于沉积 -生物作用型元素的富集 ,并以有害元素 Cu、As、 U、 Pb、 Mo、 Sr和 Co的富集为特征。煤中黄铁矿及其他硫化物是许多有害元素的重要载体 ,充分凝胶化的富氢镜质体比其他组分承载和吸附有更多的有害元素。深入研究不同煤层的有害元素的有机亲和性有利于指导煤的合理利用和采用有效的有害元素的去除措施 。On the basis of the analysis results of the trace elements of coals in the Taiyuan Formation from Zaozhuang coal field with INAA(Instrumental Neutron Activation Analysis),the trace element distributions,fraction mass,coefficient and cluster diagram are obtained.The trace element distributions in different macerals of coal are determined with the help of SEM EDX.It is concluded that the strong reducing condition in peat swamp due to sea waters influence was favortite to the concentration of some toxic elements in coal,meanwhile some minerals such as pyrite were formed under such condition.Two groups of elements are distinguished according to the cluster analysis,one of them is the detritus element group,and another is the chemical organism group,to which the most hazardous elements belong,such as elements Cu,As,U,Pb,Mo,Sr and Co.In the Taiyuan Formation the coal hazardous elements exit in two components,i.e.pyrite as inorganic matter and vitrinite as organic material.Due to the fact that many hazardous elements have strong correlation with organic matter and are difficult to be separated from coal,they exit greater risk to human being and environment from the usage of the coals.If the gravity separation were carried out to remove sulfur and ash,a lot of the hazardous elements in high sulfur content coals could also be eliminated.\;

关 键 词：枣庄煤田 太原组 煤 微量元素 地球化学 

分 类 号：P618.110.4[天文地球—矿床学] P595[天文地球—地质学]