阿刀亥矿区CP2煤段粘土岩夹矸研究

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

STUDY ON TONSTEINS OF COAL MEMBER CP 2 IN ARDAOHE COAL DISTRECT

The coal member CP 2 of Daqing Mountain coalfield,and has more than 40 beds of tonsteins at most.There are illite of illite kaolinite clayrocds(or tonsteins) at the seam roof or in the tonsteins near the top of coal member being in scour contact with the conglomerate member CP 3 ,and,downwards,are all kaolinite clayrocks(tonsteins)in both the seam and seam floor.The kaolinites have in different degree been alterad into tobelites and diaspores.The former were distributed along the joint fissures of the tonsteins in the shape of scaly and fibrous aggregates,ribbon of the pseudomorph of the kaolinite crystal grains.The latter occurred in the banding with rich organic matter taking the form of the microcrystalline or fine crystalline aggregates.The features as above show that kaolinite in the clayrocks and tonsteins was trasformed into illite on open condition which K +ions can be got or trasformed into tobelite on enclosed condition.The NH + 4 ions can stem form deep underground.