东濮凹陷断裂体系及其意义

Rift system of Dongpu sag and its meaning.

断裂是断陷盆地的一种普遍地质构造现象 ,因此 ,研究断裂的规律性十分重要。人们通常将平面上延伸方向相同或相近的一组断层称为一个断裂系统 ,它是对断裂的一种平面静态描述 ,强调的是断裂的平面走向。本文将同一成因、同一时期、不同级别、不同倾向、不同走向断裂的集合体称为一个断裂体系 ,一个断裂体系可以包括几个断裂系统。断裂体系是对断裂的立体特征、时间性的四维描述和分析。与张文佑先生针对大地构造提出的断裂体系不同 ,本文所阐述的断裂体系是针对凹陷级别的断陷而言的。

The faults is common geologic structural phenomenon in faulted basin,therefore,studying the rule of faults is of great importance.The people usually call a group of faults that have same extension direction or similar extension direction on the plane as a “fault system”,which is static description of faults on the plane and highlights the strike of faults on the plane;The paper calls an assemblage of faults that have same cause of formation,same age,different scales,trends and strikes as a rift system,one rift system can include several fault systems.The rift system is 4-D description and analysis that include stereo nature and timeliness of faults.Different from the rift system of tectonics presented by Mr.Zhang Wen-you,the rift system expounded in the paper is related to sag,the analysis of this rift system is helpful to study the faults and appreciate the relation with oil/gas reservoir.