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本文以布郎意－蒙索盆地厚度达４０ｍ的第一煤层为单元，根据煤样光片光泽、色彩及组构划分出八类煤相。用有机岩石学方法及热解分析法详细研究了这些煤相。结果表明该煤层主要为微异地－异地沉积，生源输入以木本植物为主；煤层内部也存在类似煤系地层那样的旋回沉积，其原因推测为泥炭非均一性引起差异压缩；煤相的变化主要由水动力条件及水平面高低引起．这种变化明显影响了显微组合的物理一化学性质，如镜质体反射率、孢子体荧光及煤相的氢指数。该研究还指出了各种沉积环境标志物的可靠性。关键词
In this paper, the first seam of 40m in Blangyi-Mengso basin is taken as a unit, and eight types of coal facies are classified according to the gloss, color and texture of the coal sample. These coal phases were studied in detail using organic petrology and pyrolysis methods. The results show that the coal seam is mainly micro-alien-off-site sedimentation, and the biomass is dominated by woody plants. There is also a sedimentary deposit similar to coal-bearing strata within the coal seam, which is presumed to cause differential compression of heterogeneity of peat. Mainly caused by hydrodynamic conditions and water level. This change significantly affects the physico-chemical properties of the microscopy, such as vitrinite reflectance, sporophyte fluorescence, and the hydrogen index of the coal phase. The study also identified the reliability of various sedimentary environmental markers. Key words