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利用野外资料、地震资料、煤田钻孔资料以及古生物资料,对松辽盆地外围探区敦化盆地的代表性地层划分方案进行了梳理,通过敦化盆地与周缘盆地之间的对比和分析,得出下列认识:(1)明确了珲春组的时代为始新世—渐新世;(2)指出白垩系上统龙井组地层在敦化盆地内可能是不存在的;(3)将原帽儿山组上段和下段分别划归泉水村组和长财组;(4)认为大砬子组、泉水村组、长财组和屯田营组在敦化盆地内是存在的,并通过盆间岩性地层和古生物地层对比指出大砬子组的时代可能为早白垩世阿普特期(Aptian)—阿尔布期(Albian),长财组时代可能为早白垩世贝利阿斯期—阿普特期;(5)对敦化盆地内几个地方地层名称的使用进行了修正;(6)建立了敦化盆地内目前可供参考使用的地层序列。
Based on the field data, seismic data, coal drilling data and palaeontological data, the representative stratigraphic subdivision scheme of Dunhua Basin in the periphery of Songliao Basin is reviewed. Based on the comparison and analysis between the Dunhua Basin and the peripheral basins, the following results are obtained (2) It is pointed out that the Upper Cretaceous Longjing Formation strata may not exist in the Dunhua Basin; (3) the original Mao’ershan Formation (4) It is considered that the Dashijizu group, the Quanshuncun group, the Changcai group and the Tuntianying group exist in the Dunhua basin, and that through the lithological stratigraphy and paleontology in the basin, The stratigraphic comparison shows that the age of the Dadukizu Formation may be the Early Cretaceous Aptian-Albian period, that of the Changzuci Formation may be the Early Cretaceous Belize-Aptian period, ) Amended the use of stratigraphic names in several places in the Dunhua Basin; (6) Established stratigraphic sequences currently available for reference in the Dunhua Basin.