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利用岩石薄片和扫描电镜观察以及Ｘ－衍射资料研究了吐鲁番坳陷中上侏罗统碎屑岩中的自生粘土矿物特征，发现碎屑岩中的自生粘土矿物主要有五种类型，即蒙脱石、伊利石－蒙脱石混层、伊利石、绿泥石和高岭石。自生粘土矿物的形成和转化取决于碎屑岩原始矿物组分及其成岩环境。蒙脱石的迅速转化和高岭石的大量析出与碎屑岩的大规模溶解有着密切的关系。根据自生粘土矿物的组合特征，可以有效地确定碎屑岩的成岩阶段及其孔隙发育特征。
The characteristics of authigenic clay minerals in the Middle-Upper Jurassic clastic rocks in the Turpan Depression have been studied by means of thin rock slices, scanning electron microscopy (SEM) and X-ray diffraction (XRD) data. It is found that there are mainly five types of authigenic clay minerals in the clastic rocks, Stone, illite-montmorillonite, illite, chlorite and kaolinite. The formation and transformation of authigenic clay minerals depend on the original mineral composition of clastic rocks and their diagenetic environment. The rapid conversion of montmorillonite and the massive precipitation of kaolinite are closely related to the large-scale dissolution of clastic rocks. According to the combined characteristics of authigenic clay minerals, the diagenetic stage of clastic rocks and their pore development characteristics can be effectively determined.