断层活动速率研究方法及应用探讨

Research on Fault Activity Ratio and Its Application

李勤英,罗凤芝,苗翠芝

Li Qinying，Luo Fenhzhi, Miao Cuizhi

中原石油勘探局地调处

Geologic Investigation Company , Zhongyuan Petroleum Exploration Bureau , Henan 457001 , P. R. China

东濮凹陷的形成与发育过程非常复杂,经历了多期构造运动,为了对其断层作进一步研究,提出断层生长指数不能正确反映断层的实际活动强度,从而引入断层活动速率这一概念,由此更好地分析、研究断层的发育与形成情况,进一步探讨东濮凹陷的构造形成与发育。通过对兰聊、长垣及黄河断裂带断层活动速率的统计、分析,认为东濮凹陷二级断层及其所派生的次级断层从古至今都经历了弱—强—弱—较强的螺旋式发展过程。

Dongpu depression , which formation and development are very comlicated , underwent multistage tectonization. In order to further research on it , at first ,it was illustrated that the fault growth index can not precisely reflect the actual fault activity strength then the conception of fault activity rate. The procedure fit s to better analysis and study of the formation and development of the fault s. So it is clear to study the formation and evolution of structure of Dongpu depression. By means of the statistics , analysis and research on the Lanliao fault zone , Changyuan and Huanghe fault activities ,we believe that the secondary fault s and it s derived secondary fault s have been experienced weak —strong —weak — stronger spiral developing process from ancient times to the present .