腐植煤中的超细纹层

利用超薄切片透射电镜分析技术，在华北东部太原组和山西组、吐─哈盆地侏罗系腐植煤中检出了超细纹层。超细纹层在腐植煤中呈分散状、间隔状和密集状，前二者主要存在于无结构镜质体中，后者则存在于沥青质体或层状藻类体条带中。超细纹层来源于微藻类细胞的抗分解外壁，是藻类在超微层次的重要表现形式。腐植煤形成过程中藻类的贡献较藻类体数量所反映的要高。

ULTRALAMINAE IN HUMIC COALS

ltralaminaes were observed by Transmicssion Electron Microscopy analysis of ultrathin sections in a number of humic coals from late palaeozoic Taiyuan Formation and Shanxi Formation of Eastern part of North China, Jurassic coal measures of Turfan--Hami Basin respectively. Ultralaminae may occur as solitary, interval and aggregatein in humic coals, the two former are mainly in collinite matrix. The latter mainly in bituminite or lamalginite strands. Ultralaminae origins from selective preservation of the thin resistant outer walls of microalgae. Submicroseopically, Ultralaminae are important form of algae. Algae material certainly far more widely spread through the humic coals than is visible as alginite.