Abstract:

Based on the detailed interpretation of the seismic profiles,the activities of the main faults in the east area of Linqing depression are analyzed by using the fault activity velocity,furthermore,the development characteristics of the faults are discussed.Based on the research above-mentioned,combined with the lateral distribution characteristics of the main structural layers of Mesozoic and Cenozoic,the fault controlling on the deposition of the strata is analyzed.The results show that the faults are the most important structure styles in Mesozoic and Cenozoic in the area of Linqing depression.According to the fault activities in each period,the development of the faults can be divided into four periods,late Jurassic to early Cretaceous,late Cretaceous,Paleogene and Neogene to Quarternary.The development characteristics of the faults are different in different periods,and the present pattern finalized in Paleogene.From late Jurassic to early Cretaceous,the east area of Linqing Sag was a large NE rift

lacustrine basin The characteristic of the remnant strata is the superimposed

outcome of the deposition controlled by the extension faults from late Jurassic

to early Cretaceous,the denudation was controlled by the regional rise,the thrust

faulting in late Cretaceous and the extension faults in Cenozoic.The NE and EW

distribution and the thinner thickness of the Paleogene strata are the outcome of

the deposition controlled by the extension faults in Cenozoic.

Key words: fault, development characteristic, stratigraphic deposition, Mesozoic and Cenozoic, Linqing depression, Bohai Bay