论文部分内容阅读
在总结松辽盆地白垩系层序地层特征的基础上，阐述了密集段的地质学和地球物理学标志．经分析，大多数重要反射层与密集段相关而并非是层序边界．根据扫描电镜分析结果，在密集段中首次发现了钙质超微化石，为区内白垩纪海水进侵提供了新的证据．由稳定同位素分析，密集段形成于缺氧、相对可容纳空间最大及水体最深时期
On the basis of summarizing the characteristics of the Cretaceous sequence stratigraphy in the Songliao Basin, the geology and geophysical markers of the intensive sections are expounded. After analysis, most of the important reflection layers are related to the dense sections and not to the sequence boundaries. According to the results of SEM, the first calcareous microfossils were found in the intensive section, which provided new evidences for the invasion of the Cretaceous seawater in the area. By stable isotope analysis, dense segments formed in hypoxia, relative to the largest space and water depth of the deepest period