松辽盆地南部梨树断陷登楼库组孢粉组合

A SPOROPOLLEN ASSEMBLAGE FROM THE DENGLOUKU FORMATION OF THE LISHU DEPRESSION IN SOUTHERN SONGLIAO BASIN

本文系统研究了松辽盆地南部梨树断陷登楼库组孢子花粉化石，计３９属６０种，描述１０属１６种。根据孢粉组合特征及对包括被子植物花粉在内的主要孢粉类型地质地理分布的分析，认为登楼库组时代应为早白垩世Ａｌｂｉａｎ期。这一孢粉组合的研究，对于登楼库组地质时代的进一步确定及我国东北地区白垩纪孢粉组合序列的建立、完善与地层划分对比有较重要意义。

Cretaceous strata are well-developed in the Lishu Depression, which is situated on the middle-lower reaches of the eastern Liaohe River in southern Songliao Basin. The Denglouku Formation is a suite of sedimentary rocks composed of mudstone and conglomerate, with a thickness possibly attaining 1000- 1500m in this district. Although there is an opinion on the Early Cretaceous age of these strata, the age still remains in doubt and needs further consideration due to the lack of systematic studies on the fossil contained therein. The materials under study were obtained from the Denglouku Formation in Well Lishu-1 of the Lishu Depression, with rich pollen grains and spores found, which may be assigned to 39 genera and 60 species, including 16 species in 10 genera described here.