摘要
对山西晋城矿区3号无烟煤层进行了实地观测,采集了一定数量的标本,通过显微镜下鉴定、差热分析、X射线粉晶衍射分析、红外吸收光谱分析等一系列测试手段对无烟煤层中泥岩夹矸的岩石矿物学特征进行了研究,对其主要成分高岭石发生变化的主要原因及影响因素进行了探讨。结果发现,无烟煤层中泥岩夹矸的主要成分高岭石因受不同因素的影响而向不同方向发生转化,主要表现在高岭石向伊利石转化,并有伊利石-蒙脱石(I/S)混层矿物及蒙脱石出现。造成这种煤的变质程度升高而其夹矸成分转化的主要原因可能是区域变质作用及周围介质条件影响所致。
The paper deals with the petromineralogical features of tonstein contained in anthracite coal measures and the main reasons and factors affecting the composition of kaolin, the main component of tonstein. A series of approaches, such as microscopic identification, differential thermal analysis, X-ray powder diffraction analysis, infrared absorption spectral analysis, were used to study the samples collected from the working field. It has been found that having been influenced by different factors, kaolin was transformed toward different directions. The results suggested that kaolin was transformed toward illite, accompanied by the appearance of I/M and montmorillonite. The rise of coal metamorphic grade and its sloam transformation is attributed to regional metamorphism and medium conditions around it.
出处
《矿物学报》
CAS
CSCD
北大核心
2003年第3期235-240,共6页
Acta Mineralogica Sinica
