Sequence Stratigraphic And Sedimentary Features Of Carboniferous-Permian System In Juyanhai Depression Of Yin'e Basin

In this thesis,directed by sedimentology and sequence stratigraphy,combining previous geological understanding with research results,a comprehensive study on the development characteristics of Carboniferous-Permian sequence strata and sedimentary facies in Yin'e basin were carried out by using core data,logging data,thin slice data and other geological data.The sequence stratigraphic framework of Carboniferous-Permian in the Juyanhai depression of the basin has been established.The Carboniferous-Permian in Juyanhai depression of Yin'e basin can be divided into two third-order sequences.The contour map of the sequence stratigraphic plane was drawn.The sedimentary center in the Sq₁period was located in the Lujing depression,while the sedimentary center in the Sq₂period migrated to the Tiancao depression in the southeast direction.The overall sedimentary environment of the Carboniferous to Permian in the Juyanhai depression of the Yin'e basin is shallow sea,which can be divided into alluvial fan facies,braided river delta facies,tidal flat facies and shallow sea shelf facies.There are mainly alluvial fan facies and braided river delta facies in Wuzhu'er depression and Lujing depression in the northwest of the study area.Tiangcao depression and Jigeda depression near the southeast mainly develop tidal flat facies and shallow sea shelf facies,which is the best location for the development of source rocks.