论文部分内容阅读
通过对蔚县煤田下花园组煤中植物残体——分散角质层、半丝炭化木材等研究,结合非煤层中植物化石和孢粉组合特征分析,认为泥炭沼泽植物群落主要由松柏类、银杏类、苏铁类和蕨类组成,它们都是本区成煤的重要物质来源。这种森林体系代表了一种温暖潮湿、雨量充沛的古气候条件。煤中丝炭及半丝炭化组分含量丰富是泥炭堆积速度快于盆地基底沉降速度,并最终导致泥炭沼泽覆水浅,泥炭层多处于相对干燥、氧化环境的表现。不同煤层中丝炭及半丝炭化组分含量的差异,为煤层对比提供了新的依据。
Based on the study of plant residues - disperse stratum corneum and semi-wire carbonized wood in coal of Xiahuayuan group in Yuxian coalfield and the characteristics of plant fossils and sporopollen assemblages in non-coal seam, it is considered that the community of peat swamp mainly consists of coniferous species, Cycas, Cycas and Ferns, all of which are important sources of coal in this area. This forest system represents a warm, humid, abundant paleoclimatic conditions. The enrichment of char and semi-filamentary carbonized coal in coal is faster than that of basal sedimentation in peat and eventually leads to shallow peat swamp and relatively more peat layers in a relatively dry and oxidizing environment. The differences of the contents of carbonized and semi-filamentary carbonized components in different coal seams provide a new basis for the comparison of coal seams.