Structural Style and Evolution in Dongpu Sag

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.