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内蒙大青山煤田ＣＰ２煤段含粘土岩夹矸多达４０余层。与上覆ＣＰ３砾岩段冲刷接触的煤段顶板和顶部粘土岩夹矸，为伊利石或伊利石－高岭石粘土岩。其下煤段中夹矸及底板为高岭石粘土岩，均发生了不同程度的铵云母化和一水硬铝石化。鳞片状、纤维状、条片状及晶粒假象铵云母沿粘土岩夹矸的节理裂隙呈脉状产出；微、细晶一水硬铝石沿碳质碎屑条带及富有机质的高岭石基质条带分布。这些特征表明，在有Ｋ＋离子带入的开放条件下，粘土岩中的高岭石向伊利石转化；在煤层封闭的粘土岩夹矸中，高岭石向铵云母转化，ＮＨ＋４离子主要可能来自深部
Inner Mongolia Daqingshan coalfield CP2 coal clayey rock with more than 40 layers of debris. The top and top clay rocks of the top of coal blocks washed with the overlying CP3 conglomerate sections were illite or illite-kaolinite clay. The coal gangue in the gangue and bottom of the kaolinite clay rock, occurred in varying degrees of ammonium mica and a diasporic. Flake-like, fibrous, strip-like and grain pseudo-ammonium mica along the clay rock gangue fracture was vein-like output; micro, fine grained diaspore along the carbonaceous debris bands and organic matter high Ling stone matrix strip distribution. These features indicate that the kaolinite in clay rocks is converted to illite under open conditions with K + ions, and that kaolinite is converted to ammonium micas in coal-bound clay rocks. NH + 4 ions may mainly come from Deep