黄骅坳陷古近纪地震事件沉积研究

Eogene Seismite of Huanghua Depression

震积岩是地层中具有古地震事件记录的岩石.通过岩心观察和描述,在黄骅坳陷古近系中识别出震积岩,主要标志为同沉积变形构造,包括小规模阶梯状正断层、微褶皱纹理、振动液化砂泥岩脉、负荷构造、火焰构造等,通过单井岩心分析,建立了震积垂向序列.震积岩在单井岩心中重复出现,表明裂陷活动具有周期性和幕式特点.黄骅坳陷震积岩的发现为陆相断陷湖盆构造演化研究和震积岩的识别和描述提供了重要的依据,同时也具有一定的油气地质意义.

By the observation of drilling cores, the seismite is recognized in Tertiary in Huanghua Depression. Many Kinds of syn-sedimentary deformation structures have been found in seismite, including stepmicro-faults, micro-corrugated laminations, vibrational liquefaction sandstone and clay veins,loadingstructure, flamboyancy structure and so on. By the analysis of seismite of single well,seismite sequence have been put forward. The repeated emergence of seismite in strata section shows that the faulting activity has periodicity and episodicity. The research provides theoretical foundation for the continental rift lacustrine basin, and also have certain tectonic evolution studies and seismite recognization in oil-gas geology meaning.