THE EOCENE STRATIGRAPHIC DIVISION AND CORRELATION OF THE CHALUHE DEPRESSION IN THE YITONG BASIN

The Caluhe Depression of the Yitong Basin is a extension rift basin,due to the complex tectonics,particular morphology,sedimentary source from several directions,several depocenter and subsidence center and the rapid facies transition,there is much difficulty in the stratigraphic division and correlation.Based on the data of predecessor research,involved some methods and data of well lithology,geophysical,paleontology,combined with sequence stratigraphy,this paper deals with the Eocene stratigraphic division and correlation of the Chaluhe Depression in the Yitong Basin.It is suggest that Eo-cene is made of the Shuangyang Formation,the Shelin Formation and the Yongji Formation,and indicate the evidences of strata division and correlated,and analysis the correlation between the Yitong Basin and the Bohai Bay Basin.