淮南煤中矿物特征与成因分析  

Characteristics and Geological Genesis of Minerals in Coals of Huainan

作　　者：陈萍[1] 姜冬冬[1] 

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2012年第3期1-6,49,共7页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(40772092)

摘　　要：煤中无机成分主要以矿物的形式存在,矿物质作为煤中的组成部分,在煤地质、开发、洗选、燃烧、气液化等方面有十分重要的意义。运用偏光显微镜、X射线衍射(XRD和能谱扫描电镜(SEM-EDAX)等方法对淮南煤田煤中矿物做了分析。研究表明淮南煤中矿物含量占煤中显微组分的10%左右。常见矿物为硅酸盐矿物,其次为碳酸盐矿物、氧化物矿物及少量硫化物矿物等。硅酸盐矿物中主要为高岭石、伊利石、伊蒙混层等粘土矿物,少见有绿泥石和锆石,偶见钠长石和白榴石;碳酸盐矿物中除了常见的方解石和菱铁矿外,在潘一井田1 048 m的深部,发现了碳酸锶;氧化物矿物主要为石英和金红石,硫化物矿物主要有黄铁矿,磷酸盐矿物大类除磷灰石外,还鉴定出了煤中未曾发现过的磷铝钡石。结合沉积环境分析,硅酸盐矿物、磷酸盐矿物多为陆源碎屑成因,盐类矿物、氧化物矿物和碳酸盐矿物多为自生矿物,伴有铁白云石,石英与方解石的交代现象。By using optical microscope,scanning electron microscopy(SEM) and X-ray diffraction(XRD),the contents and geological genesis of minerals in coals of Huainan are analyzed.Results show that in general the inorganic components in coals of Huainan are less than 10%.The dominant type of minerals in coals is silicate,with secondary carbonate and oxide minerals,followed by small amount of pyrite and other minerals.The silicate minerals mostly include kaolinite,illite and illite montmorillonite mixed-layer clay minerals.In addition to calcite and siderite,strontianite also includes in the coal of Pan Yi Mine in the depth of 1 048 meter.The oxide minerals are mainly quartz and rutile.Besides apatite,we first found BaAl2(OH)2 in coal.Combined with the sedimentary environment analysis of the Huainan coal,it is suggested that the silicate minerals and phosphate mineral causes of terrigenous clastic.The carbonate minerals and oxide minerals are authigenic minerals,and there are ankerite,quartz and calcite metasomatism.

关 键 词：矿物 煤 成因 

分 类 号：TD167[矿业工程—矿山地质测量]