松辽盆地白垩纪介形类生物地层学特征  

BIOSTRATIGRAPHIC CHARACTERISTICS OF CRETACEOUS OSTRACODA FROM THE SONGLIAO BASIN

作　　者：叶得泉[1] 徐静慧[1] 

机构地区：[1]大庆石油管理局勘探开发研究院

出　　处：《微体古生物学报》1994年第4期429-438,共10页Acta Micropalaeontologica Sinica

摘　　要：本文详细论述了松辽盆地白垩系介形类属、种数量及壳饰变化在纵向上的分布规律和介形类组合特征的生物地层学意义。认为介形类属的分布是岩石地层组划分的重要依据，种的分布控制了岩石地层段的划分，并可将萨尔图油层、葡萄花油层和高台子油层进一步细分。同时指出松辽盆地介形类的盛衰与湖盆的发育关系密切，介形类的演化周期与湖盆的发育、收缩和沉积旋回相一致，在湖盆最发育的时期，也是介形类繁盛的高峰，湖盆发育的初期和末期，往往是介形类的发生和衰退期。This paper discusses in detail the quantitative patterns in vertical distribution of the Cretaceous Ostracoda genera and species,the variations of shell ornaments,and the biostratigraphic significance in the characteristics of Ostracoda assemblage.It is considered that the distribution of Ostracoda genera provides an important basis for the division of lithostratigraphic formations, while the distribution of species controls the division of lithostratigraphic members,and thus a subdivision can be made on the subsequent oil layers,namely the Sarto,Putaohua and Gaotaizi layers.In addition,the authors point out that the prosperity or adversity of the Ostracoda in the Songliao Basin is closely related to the development of the lake basin.The developmental cycle of the Ostracoda agrees with the development of the lake basin and the cycle of sedimentation.When the basin was fully developed,they were at the climax of prosperity;on the contrary,when the basin was at the initial stage and the terminal stage,the ostracods were often poorly developed with low diversity.

关 键 词：介形类 生物地层学 松辽盆地 白垩纪 

分 类 号：Q915.819.6[天文地球—古生物学与地层学]