东濮凹陷构造样式及其演化规律

Structural Style and Evolution in Dongpu Sag

从伸展盆地形成和演化的构造背景出发,以构造几何学的基本概念为依据,主要对东濮凹陷的伸展、走滑、变换以及底辟构造样式进行了分析,认为古近纪东濮凹陷是伸展和走滑作用双重机制下演化和形成的。而在伸展作用基础上叠加的走滑作用、南华北盆地对东濮凹陷南部的影响以及盆地中部岩盐底辟作用等是形成两个横向变换构造带,从而形成复杂的构造样式和组合的主要因素。

According to structural setting in formation and evolution of stretching basin, this paper presents the analysis of the stretching, strike-slipping, transforming and diapiric structural styles in Dongpu sag in terms of structure geometry. It is suggested that Palaeogene Dongpu sag was evolutive and formed under the setting of both stretching and strike-slipping processes. Such a stretching process superimposed with the strike-slipping one, the effect of south North China basin on southern Dongpu sag and the salt rock diapiric process in middle of the basin are the main factors for forming two lateral transforming structural zones, thus forming complex structural styles and structural combinations in this sag.