主要研究内蒙古东北地区上古生界各成岩—极低级变质强度带内黏土矿物的含量变化特征,以伊利石结晶度<0.25(浅变质带)、伊利石结晶度0.25~0.42(近变质带)和伊利石结晶度>0.42(晚期成岩带)分别讨论黏土矿物相对含量、混层黏土矿物混层比,黏土矿物组合等的变化趋势,进而探讨黏土矿物的成因意义。[1-2] This paper mainly studies the variation of clay mineral content in each diagenetic-ultra-low-grade metamorphic zone in the Upper Paleozoic of northeastern Inner Mongolia. Based on the variation of illite crystallinity <0.25 (superficial metamorphic zone), illite crystallinity 0.25-0.42 (near metamorphic zone) And the degree of illite crystallinity> 0.42 (late diagenesis zone), respectively, the relative content of clay minerals, mixed clay mineral mixing ratio, clay mineral assemblages and other trends are discussed, then the origin of clay minerals is discussed. [1-2]