济阳坳陷滋镇洼陷构造特征

Structural Characteristics of Zizhen Sag in Jiyang Depression

陈海红 张先平 叶加仁

CHEN Hai-hong ZHANG Xian-ping YE Jia-ren

中国地质大学 石油系, 湖北 武汉 430074

Petroleum Department, Chinese University of Geosciences, Wuhan 430074, China

济阳坳陷的滋镇洼陷勘探程度比较低, 文章从滋镇洼陷的形成演化、边界断层活动的时空差异性和沉降中心的迁移等三个方面来刻画其构造特征, 认为滋镇洼陷形成演化可分为四个阶段, 即孔店-东营阶段的三个断陷期及新近系-第四系的坳陷期;基山边界断层活动的时空差异性导致了沉降中心的迁移, 形成了东西两个次洼。

Zizhen sag, a small asymmetrical sag in Jiyang depression, is explored to a low degree. The paper describes the structural characteristics of Zizhen sag from three aspects as follows:formation evolution, the spatio-temporal differences of margin fault activity and the transference of subsidence center. Besides, four formation evolution phases of Zizhen sag are divided:three rifting stages in Kongdian-Dongyin formation and one subsiding stage in Neogene. The spatio-temporal differences of the Jishan fault activity lead to the transference of subsidence and form two secondary sag in the east and west respectively.