登封煤田山西组黏土矿物类型及沉积环境

为了对豫西登封煤田山西组黏土矿物类型及沉积特征进行研究，以岩石学、沉积学等方法为依据，运用X射线—衍射分析、差热分析、扫描电镜及能谱分析对豫西登封煤田山西组黏土矿物类型进行了鉴定。结果显示，区内黏土矿物以高岭石、伊利石为主，其次为蒙脱石及绿泥石，表明山西组的沉积环境是以温暖潮湿的酸性介质为主，次为温暖干燥的碱性介质条件。该成果可为豫西登封煤炭资源的开发利用提供重要的基础地质资料。

Clay minerals and sedimentary environment of Shanxi Formation in Dengfeng coal field

To study the types of clay minerals and sedimentary environment of Shanxi Formation in Dengfeng coal field，on the basis of the petrology and sedimentology，the clay minerals were identified by the X-ray diffraction analysis，differential thermal analysis，scanning electron microscopy and energy spectrum analysis. The result shows that，the clay minerals are mainly consist of kaolinites and illites indicating warm and humid environment，while the warm and dry environment is supported by the secondary components of montmorillonites and chlorites. The result can provide important and essential geological data for the coal development and exploitation in Dengfeng coal field.