[关键词]
[摘要]
自1987年辽河油田分公司在内蒙古自治区开鲁盆地钻探第一口钻井——陆参1井开始,至今已完成各类钻井150余口,对20余口探井1500余块样品进行了分析后,获得了大量保存精美的孢粉化石,积累了丰富的第一手资料。文中通过对近20年地层古生物资料的系统整理和研究,建立了3个早白垩世孢粉组合,自下而上为九佛堂组Cicatricosisporites-Concavissimisporites-Classopollis组合、沙海组Cicatricosisporites-Abdiverrucospora-Piceaepollenites组合、以及阜新组Cicatricosisporites-Laevigatosporites-Pilosisporites-Asteropollis组合,叙述了组合特征,并与国内外孢粉组合进行对比,确立了本区早白垩世生物地层层序及地质时代。
[Key word]
[Abstract]
The Liaohe Oil Company has more than 150 wells of different kinds drilled in the Kailu Basin, and the first well, Lushen 1 was drilled there in 1987. The author has made laboratory analysis on more than 1500 core samples from more than 20 wells, obtained a large quantity of sporopollen fossils with first hand data accumulated. In the study, systematic integration and research has been done on the palaeobiological data for the recent 20 years, three sporopollen assemblages of the Early Cretaceous have been established with their features listed, in ascending order they are the cicatricosisporites-cancovissimisporites-Classopollis Assemblage of the Jiufutang Formation,the Cicatricosisporites-Abdiverrucospora-Piceaepollenites Assemblage of the Shahai Formation,and the Cicatricosisporites-Laevigatosporites-Pilosisporites-Asteropollis Assemblage of the Fuxin Formation.In addition, comparisons are made with foreign and other domestic sporopollen assemblages. Based on the above, the Early Cretaceous biostratigrapgic sequence and geological datings have been established in the study area,and they have important significances for the hydrocarbon exploration and the studies on the Cretaceous sequence, biota and age assignment.
[中图分类号]
Q913.84
[基金项目]
本文承蒙中国地质科学院余静贤研究员、沈阳地质矿产研究所吴洪章研究员、北京大学王宪曾教授审阅,笔者谨此致谢.