华蓥山矿区煤系底部粘土岩的矿物岩石学

运用偏光显微镜、化学分析、X射线衍射(XRD)和扫描电子显微镜(SEM)等分析方法,对四川华蓥山矿区煤系底部的粘土岩进行了矿物岩石学研究。结果表明,该层粘土岩高岭石含量高达90%以上,粘土岩中的高岭石呈结晶鳞片状,粒度为0.5~10μm,结晶程度较好,晶格内杂质元素混入物较少,具有较高的资源化开发利用价值。粘土岩中的杂质元素Fe和S以独立矿物黄铁矿赋存在粘土岩中,这对粘土岩资源化利用过程的分选富集是有利的。

A mineralogical investigation to clay occurrence on the bottom of coal system in Huayingshan coalfield

By means of various methods such as polarized microscopy,chemical analysis,X-ray diffration(XRD) and scanning electronic microscopy(SEM),systematic mineralogical and petrological studies on the clay which is in ocurrence at the bottom of coal system in Huayingshan coalfield,in Sichuan,China,were carried out.The result reveals that the clay is mainly composed of kaolinite with high quality,and the non-clay minerals are simply composed of pyrite only, this is favourable to the minerals seperation during making use of the clay in industrial exploitation and application.