大庆石油地质与开发

1986, (02) 1-8

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松辽盆地白垩系嫩江组的介形类化石及演化特征
OSTRACODA OF NENJIANG GROUP,CRETACEOUS IN SONGLIAO BASIN AND ITS EVOLUTION FEATURES

叶得泉
Ye Dequan ;

摘要(Abstract):

嫩江组的介形美化石类型和数量都很发育,保存完整,壳饰特征明显,分带规律清楚,纵向上将其划分为16个化石带,并将相应的地层划分为17层,对黑帝庙油层的细分层研究很有意义。同时根据介形类化石属、种数量变化、壳饰特征研究了嫩江组的介形类化石的演化特征,及其与沉积环境的关系。认为嫩江组的介形类化石壳饰有两种类型,即:蜂孔—网状类型;小瘤状—刺状瘤—瘤状类型。壳饰的变化,明显地反映了生物生活环境的变化。
The Ostracoda of Nenjiang group is very well developed in types and wealth, preserved perfectly with clear shell-decorations, regular zonation and is subdivided into 16 fossil zones vertically. The corresponding strata are subdivided into 17 formations.Thus, it is of great significance for the study of subdividing Heidimiao oil-bearing formation. The evolution features of Cretaceous Ostracoda of Nenjiang group and the relation to its sedimentary environment are also studied bsaed on the variations in numbers of genera and species and the characteristics of shell-decorations.Two types of the fossil Ostracoda of Nenjiang group have been recognized. One is honeycomb-network, the other is nodule-spinous-tumour.The variations in shell-decoration indicated the changes of the living environment of the biota

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作者(Authors): 叶得泉
Ye Dequan ;

DOI: 10.19597/j.issn.1000-3754.1986.02.001

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