Abstract: The identification marking of three terrigenous sequences in the upper member of Eh of Biyang fault-depression is distinct not only on seismic profile and electric log curve,but also in lithologic-geochemical features.Particularly,the lithologic-geochemical features to identify terrigenous sequence boundary include lithological types marking,clay-mineral and cement characteristics in coarse fragments,chemical constituent,C and O isotope.

Key words: terrigenous sequence, sequence division, boundary identification, lithologic-geochemistry, Biyang fault-depression

摘要： 泌阳断陷双河-赵凹地区下第三系核三上段所划三个陆相层序不仅在地震剖面、电测曲线上有显着的识别标志,而且它们在岩石地球化学特征上,亦有明显反映.具体地,识别陆相层序界面的岩石地球化学标志包括:①岩石类型标志;②砂砾岩中粘土矿物及胶结物特征;③化学成分标志;④碳氧同位素特征.

关键词: 陆相层序, 层序划分, 界面标志, 岩石地球化学, 泌阳断陷