CAJ | 학술논문

松辽盆地发育我国最好的白垩纪地层，岩石地层系统早已确立，但年代地层系统仍存不少争议。泉头组时代的确定是解决盆地内上、下白垩统界线的关键。泉头组上部孢粉化石丰富，孢粉组合以频繁出现Quantonenpollenites crassatus,及Schizaeoisporites, Asterisporites, Foraminisporis, Cibotiidites 等属孢子，Quantonenpollenites tarimensis及被子植物花粉Cranwellia, Scollardia, Lythraites, Xinjiangpollis等少量出现为主要特征，与塔里木盆地库克拜组上段的孢粉组合可以比较，时代应为土仑期。泉头组为一套连续沉积，与其下的登楼库组（阿尔必期）为平行不整合关系。泉头组下部的孢粉组合中被子植物花粉的分异度尚低，但已有相当含量（最高达30.3%），可与塔里木盆地库克拜组中、下段的孢粉组合比较，时代为赛诺曼期。孢粉化石的研究表明，松辽盆地上、下白垩统的界线应在泉头组的底界，即泉头组与登楼库组之间，而不是在泉头组的顶界。文内描述1新种：Interulobites radialimbosus sp. nov.， 5新组合： Neoraistrickia rareverrucosa (Chlonova) comb. nov., Asterisporites montanensis (Tschudy) comb. nov.，Cranwellia striatella (Mtschedlishvili) comb. nov.， Quantonenpollenites causea (Stover) comb. nov., Quantonenpollenites tarimensis (Zhang et Zhan) comb. nov., 并修订Yichangsporites和Quantonenpollenites属的特征。
송료분지발육아국최호적백성기지층，암석지층계통조이학립，단년대지층계통잉존불소쟁의。천두조시대적학정시해결분지내상、하백성통계선적관건。천두조상부포분화석봉부，포분조합이빈번출현Quantonenpollenites crassatus,급Schizaeoisporites, Asterisporites, Foraminisporis, Cibotiidites 등속포자，Quantonenpollenites tarimensis급피자식물화분Cranwellia, Scollardia, Lythraites, Xinjiangpollis등소량출현위주요특정，여탑리목분지고극배조상단적포분조합가이비교，시대응위토륜기。천두조위일투련속침적，여기하적등루고조（아이필기）위평행불정합관계。천두조하부적포분조합중피자식물화분적분이도상저，단이유상당함량（최고체30.3%），가여탑리목분지고극배조중、하단적포분조합비교，시대위새낙만기。포분화석적연구표명，송료분지상、하백성통적계선응재천두조적저계，즉천두조여등루고조지간，이불시재천두조적정계。문내묘술1신충：Interulobites radialimbosus sp. nov.， 5신조합： Neoraistrickia rareverrucosa (Chlonova) comb. nov., Asterisporites montanensis (Tschudy) comb. nov.，Cranwellia striatella (Mtschedlishvili) comb. nov.， Quantonenpollenites causea (Stover) comb. nov., Quantonenpollenites tarimensis (Zhang et Zhan) comb. nov., 병수정Yichangsporites화Quantonenpollenites속적특정。
In the Songliao Basin of northeastern China is well-developed a non-marine Cretaceous sequence composed of 10 lithological formations (see Li Wen-ben and Liu Zhao-sheng, 1994, fig.16). Although all the formations are rich in fossils including bivalves, gastropods, conchostracans, ostracods, fishes, reptiles, charophytes, sporomorphs and plant megafossils, researchers on different fossil groups have not yet reached a consensus to chronological problems for each formation. Unfortunately, the divergence of view-points even exists among the palynologists. For the Upper-Lower Cretaceous boundary, palynologists have given two different proposals: between the Quantou and Denglouku formations (Li Wen-ben and Liu Zhao-sheng 1994) and between the Qinshankou and Quantou formations (Gao Rui-qi, 1982; Gao Rui-qi et al., 1999). Obviously, the dispute is mainly caused by the different datings of the Quantou Formation.