On thebasis of describing mineralogy characteristics such as combination electron minro-form, crystallinity of clay minerals, the relationship between coal series clay minerals in theMesozoic Era in Ningxia Area and coal metamorphism was analyzed.

• 在概述粘土矿物组合、电子显微形态和结晶度等矿物学特征的基础上，探讨了宁夏地区中生代煤系粘土矿物与煤变质的关系。