华北东部太原组镜质组中超微类脂体和太原组煤性质异常性的原因

SUBMICROLIPTINITE IN VITRINITE FROM TAIYUAN FORMATION IN EASTERN PART OF NORTH CHINA AND THE REASONS OF ANOMALOUS COALS

利用超薄切片透射电镜分析技术，对采自华北东部鲁南和苏北１８个矿区的太原组和山西组煤中镜质组的超微结构和组分进行了分析，确认太原组镜质组中含有较丰富的超微类脂体，且超微类脂体主要来自菌藻类。山西组和太原组镜质组中超微类脂体在数量上存在明显差异，证实镜质组中超微类脂体数量与其化学工艺性质紧密相关。从超微组分层次的角度解释了山西组和太原组镜质组性质差异性的原因，并分析讨论了镜质体类型、太原组煤性质异常性的原因，提出成煤过程中明显的菌藻类低等生物贡献是太原组煤性质异常的一个重要原因。

Ultrathin sections of a series of vitrinite concentrates from Carboniferous Taiywan Formation and Permian Shanxi Formation in the eastern part of North China were examined Using transmission electron microscopy. The results revealed that vitrinites of Taiyuan Formation were relatively abundant in submicroliptinite, which was domi nately derived from bacteria and algae. There were significant difference in the concentrations of submicroliptinites in vitrinite between Taiyuan Formation and Shanxi Formation. The chemical properties and behavior of vitrinites in technical processes are related to the concentrations of submicroliptinite in vitrinite. The reasons of differences of vitrinite properties between Taiyuan Formation and Shanxi Formation,vitrinite type, the reasons of anomalous coal properties of Taiyuan Formation have been explained in the level of maceral, submaceral and submicromaceral. The results suggest that abundant algae and bacteria contribution in original plant materials, in the forms of liptinite, liptodetrinite, submicroliptinite and molecular level lipoid materials incorporated in huminite/vitrinite, may be the one important reason for anomalous coal properties of Taiyuan Formation.